Articles de revues : « SOFT STOREY BUILDING »

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Mali, A. A., et P. M. Mohite. « Seismic Behaviour of Building with Soft Storey : Review ». International Journal for Research in Applied Science and Engineering Technology 11, n^o 1 (31 janvier 2023) : 227–32. http://dx.doi.org/10.22214/ijraset.2023.48499.

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Abstract: The high-rise building in which ground storey consists of open space is known as building with soft floor. Such floor plays an important role in seismic performance of the building. This is due to the abrupt changes in lateral stiffness and strength caused by such storey. In the present era there is increase in population, finding parking for flats in congested areas has become a significant issue. As a result, erecting multistory structures with an open first floor is now a widespread practice. These Buildings that have all upper storeys enclosed by masonry walls but no infill masonry walls in the ground story are referred to as "Soft Storey" or "Open Ground Storey Buildings." Compared to regular buildings, irregular structures the drift is observed to be effectively reduced by larger columns, while the shear force and bending moment on the first floor are increased. During a violent earthquake, the Soft Storey buildings function poorly. Understanding the behavior of is this study's primary goal to the building in a seismically active area and to assess the effects of Storey overturning moments, Storey drift, displacement, and design Base shear. For comparison, G-15 story building with five completely distinct shapes a square, an L-shaped building, a Tshaped building, a plus shape building and a C-shaped building is used. ETABS 2018 version is used to analyze the entire set of models. Dynamic Analysis has been examined in the current work to assess the deformation of all five-shape building with and without soft storey considering at different level. When the soft story is offered at a higher level, displacement is reduced. Several studies on this subject that have been done in the past are reviewed in this paper. Reviewing research papers let us know about the conclusive results, which served as the basis for the objective of our future study.

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Shilpa S and Navith K B. « Behavioural Study of Infill’s Walls on Soft Story Building ». September 2021 7, n^o 09 (27 septembre 2021) : 79–83. http://dx.doi.org/10.46501/ijmtst0709013.

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Open ground storey or soft storey is a typical feature in multistory structures in urban areas. This open storey is provided to accommodate parking, reception lobbies, office, communication hall etc. Many of structure having soft storey suffered major damage and collapsed in recent earthquakes. During an earthquake, because of variation in stiffness in soft story and its adjacent floors the inter story drift can occur and the lateral forces cannot be well distributed along the height of building. Lateral forces concentrate on soft story causes large displacement. In this work, an attempt has been made to observe the behavior of gradual decrease in stiffness of building, by using different types of infill material. This work discusses Optimum Earthquake response of tall buildings by response spectrum method as per IS 1893:2002 (Part- I) in ETAB’S software. Seismic parameters like storey stiffness and storey displacement are checked out.

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Sudhakar, Waghmare. « A Review : Dynamic Analysis for Controlling Seismic Response of R.C. Frame Structure by Virtual Work ». International Journal for Research in Applied Science and Engineering Technology 10, n^o 11 (30 novembre 2022) : 866–69. http://dx.doi.org/10.22214/ijraset.2022.47464.

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Abstract: The Performance of The RCC Building During Earthquake Depends Upon the Distribution of Stiffness Amongst The Storeys. If The Distribution Is Non- Uniform To A Large Extend, The Performance of The Building is Poor. The Storey Stiffness is Contributed By The Columns As Well As The Brick Infill. If The Effective Storey Stiffness of A Floor is Less Than 70% of the Storey Above Or Below It , Then It Is Called The Soft Storey. It Is Learnt From The Past Earthquakes That Soft Storey Are More Vulnerable To Failure. The Study of Building Performance During Past Earthquakes Has Revealed That Maximum Failures Have Occurred In The Parking Storey. Most of the buildings were damaged and collapse during in strong earthquake hence we will have to confirm safety against the earthquake force that are affecting the structure, and determine seismic responses of such building. In this project we will analyse the G+5 building through response spectrum analysis to develop the economic design. Computer software’s are also being used for the calculation of forces, bending moment, stress, strain & deformation or deflection for a complex structural system.

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Suresh Kannan, S. « Seismic Analysis of Soft Storey Building in Earthquake Zones ». IOP Conference Series : Earth and Environmental Science 1130, n^o 1 (1 janvier 2023) : 012023. http://dx.doi.org/10.1088/1755-1315/1130/1/012023.

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Abstract In this paper (G+8) building is modeled like a bare frame, a bare frame with the shear wall, and a bare frame with X bracing by changing the soft storey to different floors. The static analysis effect is determined for all three models with zone IV and zone V using Staad pro-V8i software. The main objective of the research was to assess the impact of a soft storey in various earthquake zones and by varying places of the soft storey from first to the top floor and for frames with different column shapes by seismic analyses in staad pro. The results of variable building models are obtained from the research regarding various parameters such as displacement, storey drift, and base shear. More significantly, comparing different structural systems revealed a reduction in lateral displacement and story drift. The shear wall reduced the Storey Displacement by 98.838% and storey drift by 99.86%. The Steel bracing reduced the Storey Displacement by 97.846 % and storey drift by 92.6%. Finally, it has been found that the Shear wall reduces lateral displacement and storey drift, thus significantly contributing to greater structural stiffness. The analysis results recommended that the shear wall use reinforced concrete frames for the seismic hazard zones and the Steel bracing recommended for the low seismic zones.

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Bhavani Chowdary, T., G. Pujitha et N. Srujana. « Non linear static analysis of stiffness irregular RC structures ». IOP Conference Series : Earth and Environmental Science 1086, n^o 1 (1 septembre 2022) : 012004. http://dx.doi.org/10.1088/1755-1315/1086/1/012004.

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Abstract Vertical structures exhibit flexibility than ordinary structures and also they show sensitivity in earthquake excitation. As per the safety standards of construction, structures are built with simple and uniform configurations. Focusing on aesthetic view of these vertical structures, discontinuity in stiffness occurs there by resulting in soft storey. this feature is highly undesirable in buildings especially in seismic active zones. However soft storey cause large deformations at the junction of building lead a greater failure for life and property. An attempt has been made to predict seismic performance of these structures considering G+ 14 storeys. Developing soft storey at base and mid level of G+14 structure and evaluating its seismic performance under non linear static analysis by using SAP2000. A comparative study is made based on, with and without soft storey of G+14 structure and results are tabulated.

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Singh, Aparna, Sunita Tolani, S. D. Bharti et T. K. Datta. « Seismic Analysis of Flat Slab Buildings on Hilly Ground ». Proceedings of the 12th Structural Engineering Convention, SEC 2022 : Themes 1-2 1, n^o 1 (19 décembre 2022) : 775–79. http://dx.doi.org/10.38208/acp.v1.580.

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In India, hilly region especially northern part is more seismically active region. Flat Slab systems are widely popular in multi-storey buildings. Flat slab building has more advantages than a regular building like fast construction, free design space, reduced floor to floor height and economical. Flat slab buildings are also being built in high seismicity region. Buildings on hilly ground are vulnerable due to their vertical and horizontal irregularity and they undergo high shear and torsion during the earthquake. Further due to short column and soft storey on uphill side has higher lateral forces that are cause to failure of buildings. In this paper, an attempt has been made to assess the seismic behavior of flat slab resting on hilly slope with soft storey and set back configuration. The methodologies have been adopted are linear dynamic analysis i.e. response spectrum analysis. Building is analyzed and designed by Etabs software. Maximum displacement, maximum inter-storey drift and storey shear are determined as response quantities. It is observed from the study that for flat slab buildings on hill slopes the storey shear is very high in the bottom columns at higher ground level, therefore extra care should be taken to design these columns for earthquake load.

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Nakum, Amit R., et Dr K. B. Parikh. « To Evaluate the Seismic Response of a Building Having Stiffness Irregularity and Plan Irregularity with Quintuple Friction Pendulum System ». International Journal for Research in Applied Science and Engineering Technology 10, n^o 6 (30 juin 2022) : 375–80. http://dx.doi.org/10.22214/ijraset.2022.43707.

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Abstract: Quintuple friction pendulum (QFPS) bearing is a new generation sliding isolation system having multiple spherical sliding surfaces. The friction isolation system with single sliding surface is designed for a specific level of ground shaking, which may prove ineffective in case of other hazard levels. The QFPS bearing on the other hand, exhibits adaptive behavior and imparts greater amount of flexibility to the designer for various levels of earthquake shaking. Here, the effectiveness of Quintuple Friction pendulum system is carried out to study the seismic demands of base-isolated building frames with stiffness irregularities and plan irregularities subjected to various earthquake ground motions i.e. Far field ground motion, near field ground motion with fling step and near field ground motion with forward directivity by comparing their estimates with the benchmark responses obtained by the Non-Linear Time History Analysis (NLTHA). SAP 2000 Software has been used for the same. The two soft storey buildings and two buildings with plan irregularity will be modelled and analyzed. The seismic demands namely, Inter story drift, peak storey acceleration, maximum base shear are considered for the study.The reduction in absolute acceleration is found more in case of PI as compared to SS for all the considered time histories. The reduction in Maximum Base-Shear is found more in case of Plan irregularity as compared to Stiffness Irregularity (Soft Story) in all the considered Time History. In isolated structure, the Inter-storey drift is found to be maximum in case of structure having soft storey as compared to plan irregularity 1 and 2. Keywords: Multi storied RC structures, Plan irregularities, Soft storey, Quintuple Friction Pendulum, Non linear Time History Method(NLTHM)

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Tomer, Sahil, et Mohit Bhandari. « Evaluation of Seismic Response of Irregular Buildings : A Review ». IOP Conference Series : Earth and Environmental Science 1110, n^o 1 (1 février 2023) : 012012. http://dx.doi.org/10.1088/1755-1315/1110/1/012012.

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Abstract The modern design and construction of buildings have led to the adoption of irregular shapes buildings which can attract large seismic forces and induce stress concentrations in the building itself. To investigate this fact a large number of research studies have been carried out. This study presents a review summary of seismic performance of irregular buildings considering vertical irregularity subjected to earthquake loadings. The seismic performance can be found by using linear and nonlinear time history analysis. Different types of irregular buildings are analyzed to review the seismic performance of the structure. It was found that the buildings with the soft story having variation in the storey stiffness yield large inter-storey drift values showing more damage as compared to types of building irregularities.

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Bhatta*, Krishna Prasad, et Gurpreet Singh. « Dynamic Response of Vertical Irregular Building As Per IS 1893(Part 1):2016 ». International Journal of Innovative Technology and Exploring Engineering 9, n^o 4 (28 février 2020) : 1957–63. http://dx.doi.org/10.35940/ijitee.c1215.029420.

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Nowadays highly increases in the high rise building with architectural requirement in modern city. The purpose of the study is to understand the response of the building due to vertical irregularities. In this paper the incorporated irregularities are as per IS1893 (Part )1:2016 and study response of 12 story building frame 13 models with mass irregular, stiffness irregular and vertical geometric irregularities are analyze in ETABS 2017 by linear dynamic analysis i.e. Response spectrum Analysis. The various structural response parameters such as maximum storey displacement, inter story drift and storey shear are taken to compare the result. Mass irregularity is placed in fourth story, stiffness irregularity is provided in first storey and vertical geometric irregularity is provided in different upper floor. It is concluded that the soft story at bottom highly increases the lateral displacement of that floor, mass irregular at fourth story highly increases the storey shear below that storey and vertical geometric irregularity effect on the relative displacement of building. Combined irregularity highly effect performance of the building therefore chance of collapse also increases as increases in irregularities. All the comparison are represented graphically.

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Mundaware, Akash D., Chaitanya M. Mahale, Gunvant S. Magar et Mahendra S. Shelke. « Seismic Behavior of RC Frame Building and Its Analysis with Improving Measures ». International Journal of Advance Research and Innovation 4, n^o 2 (2016) : 52–65. http://dx.doi.org/10.51976/ijari.421609.

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The infill masonry walls are seldom included in analysis of reinforced concrete structural systems, since masonry panels are generally considered as non-structural components. However, these panels affect the structural response, although the complexity they introduce to analysis. The effects of masonry infill on the global seismic response of reinforced concrete structures arethe part of study. Recently, it becomes important to determine the earthquake behavior of structures with infill walls in earthquake engineering. Parametric analyses on a large variety of multi-storey infill reinforced concrete structures show that, due to the hysteretic energy dissipation in the infill, if the infilling is uniform in all storey, drifts and structural damage are dramatically reduced, without an increase in the seismic force demands. Presence Soft-storey effects due to the absence of infill in the bottom storey in building is a measure problem in earthquake, as soft storey is significantly less strong or more flexible, a large portion of the total building deflection tends to concentrate in that floor with consequent concentration of stress at the second floor connections and in that case collapse is unavoidable. Open first storey is a typical feature in the modern multistory constructions in urban India. Such features are highly undesirable in buildings built in seismically active areas; this has been verified in numerous experiences of strong shaking during the past earthquakes. The present study highlights the seismic performance of RC frame building with soft stories at first as well as at different floor level. A parametric study is performed on an example building with soft storey and it is intended to describe the performance characteristics such as stiffness, shear force, bending moment, drift. The effects of masonry infill and cross bracing on above parameters have been studied for a building with soft storey. The modeling and post-processing is carried out using ANSYS software. The comparisons of different parameter of models have also been presented in the study.

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Akhtar, Javed, et Dr Samyak Parekar. « Seismic Performance of Vertical Irregular Steel Frame Structure under Mainshock-Aftershock ». International Journal for Research in Applied Science and Engineering Technology 11, n^o 5 (31 mai 2023) : 4662–88. http://dx.doi.org/10.22214/ijraset.2023.52413.

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Abstract: The majority of the structures are involved with architectural importance and it is highly impossible to achieve uniform structural properties in all directions. Hence earthquake resistant design codes considered it as irregular frames based on relative difference in the story properties. In many cases these irregularities are responsible for structural collapse of buildings under earthquake ground motions. The seismic response of buildings with irregular distribution of stiffness along the height may be differentfrom that ofregular building. Also, past earthquakes showed that structure may be subjected to sequence of ground motions but current codes do not have guidelines for such cases. It is considered that aftershock do not cause any more damage to damaged structure by the preceding mainshock ground motion. In this study steel moment resisting frame buildings are evaluated to understand the seismic response of vertical stiffness irregular frames subjected to mainshock-aftershock ground motions. The 9-story steel moment resisting frame building situated in Los Angeles is used in this study was originally developed as part of the SAC steel project. In this study soft and stiff storey case was considered at three different locations along the height, i.e., at bottom storey, mid-height storey and top storey. The single modification factor is used for irregularity. For comparison purpose dynamic properties of regular and irregular frames are kept same. Two sets of 6 records were selected representing a seismic hazard level of 2% and 10% probability of exceedance in 50 years respectively as mainshock. Two sets of 30 mainshockaftershock ground motion are considered for the study. These ground motions were developed using randomized approach. A non-linear time history analysis of regular and irregular building is carried out separately under mainshock and mainshockaftershock. The effect of building irregularity was studied for single storey modification at bottom storey, mid-storey and top storey with comparison to regular building. The comparison of a regular and irregular building is carried out in terms of maximum roof displacement and interstorey drift ratio. Also, comparison of frames under mainshock and mainshock-aftershock is done.

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Thinley, Kinzang, et Hong Hao. « Seismic response analyses and performance assessment of masonry-infilled reinforced concrete frame buildings in Bhutan without and with soft storey ». Advances in Structural Engineering 20, n^o 5 (26 juillet 2016) : 822–39. http://dx.doi.org/10.1177/1369433216661336.

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Bhutan locates in a high seismicity region but has no seismic design code of its own. Recent devastating earthquake in Nepal, which is located in the same region as Bhutan and with similar construction types, raises the concern on the seismic safety of building structures in Bhutan. This study is aimed at assessing the performance of masonry-infilled and soft storey reinforced concrete frame buildings in Bhutan under the 475- and 2475-year return period ground motions predicted from the Probabilistic Seismic Hazard Analysis. A nonlinear strut model is used to model the infill wall, and the influence of openings and soil–structure interaction are considered in the analyses. The result suggests that the masonry-infilled reinforced concrete frame buildings in Bhutan could suffer repairable and irreparable damages under the 475-year return period ground motions and severe damages and even collapse under the 2475-year return period ground motion. The buildings with the soft storey are found to be more vulnerable than the normal masonry-infilled reinforced concrete buildings. The design recommendation of Indian Seismic Code improves the performance of soft storey buildings but cannot fully negate the soft storey effect. This study is the first such effort in assessing the performance of general building stocks in the high seismicity Bhutan. The results can guide the seismic strengthening options and can be used for further loss predictions for seismic preparedness of the country.

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., Md Rihan Maaze. « SEISMIC EVALUATION OF MUTISTOREY BUILDING WITH SOFT STOREY ». International Journal of Research in Engineering and Technology 02, n^o 13 (25 novembre 2013) : 459–64. http://dx.doi.org/10.15623/ijret.2013.0213087.

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Wibowo, Ari, John L. Wilson, Nelson TK Lam et Emad F. Gad. « Collapse Behaviour Assessment of Precast Soft Storey Building ». Procedia Engineering 125 (2015) : 1036–42. http://dx.doi.org/10.1016/j.proeng.2015.11.159.

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Migda, Wojciech, et Robert Jankowski. « Numerical Analysis of a Steel Frame Building with Soft-Storey Failure under Ground Motion Excitation ». Key Engineering Materials 525-526 (novembre 2012) : 481–84. http://dx.doi.org/10.4028/www.scientific.net/kem.525-526.481.

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t has been observed during earthquakes that the soft-storey failure of an upper floor of a building results in large impact load acting on structural members of the lower storeys. It may further lead to progressive collapse of the whole structure substantially intensifying human losses and material damages. The aim of this paper is to show the results of a numerical analysis focused on the behaviour of multi-storey steel frame building that suffers from a soft-storey failure under ground motion excitation. A numerical model of the structure was created in FEM computer software and was exposed to an impact that would have been generated after a soft-storey failure due to falling of the upper floors. During the analysis, the whole structure was exposed to ground motion excitation and different moments have been chosen for the impact so as to estimate the most critical moment for the structure. The results of the study show that not only the value of the impact force is crucial but also the moment when the impact occurs. This is due to the fact that horizontal deflection of the supporting members (steel columns) varies during the time of the excitation. It has been observed that the most critical moment for the building for being subjected to a vertical impact is when the horizontal deflection is close to its peak.

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Iduwin, Tommy, et Dicki Dian Purnama. « Perilaku Gedung Dengan Perbedaan Kekakuan Antar Lantai ». FORUM MEKANIKA 8, n^o 1 (27 mai 2019) : 1–9. http://dx.doi.org/10.33322/forummekanika.v8i1.410.

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Abstract Earthquake is one of the most frequent disasters in Indonesia. This is due to the location of Indonesia which is located between 3 active plates, namely the Pacific Plate, the Indo-Australian Plate and the Eurasian Plate. While from 2018 to date the biggest and worst earthquake in the Lombok Earthquake that occurred with magnitude reached 7 on the Richter Scale and hammer earthquakes with magnitude 7.4 on the Richter Scale. One of the frequent failures caused by the earthquake is the soft store. Soft story mainly occurs in office buildings, hotels or apartments which generally have a lobby or area that is intentionally made without walls / dividers, either on the ground floor or the upper floors so that inter-floor fuss will be different. In designing and modeling structures, buildings are generally designed with open frame type port without walls. The height of the column can also cause a difference between different floors. This study will compare between the wallless portal model with a higher level at the bottom of the building, the middle of the building and the top of the building, where a high level with smaller stiffness has the potential to be soft (soft story). In this study using ETABS 9.7.2 program with spectrum response dynamic load based on the 2017 earthquake map. Results The structure period of the results of the analysis with the program in the crack cross section condition was obtained at 2.01 seconds. The shape mode for the three PPKBB, PKBT and PKBA building types has met the requirements where in shape 1 and 2 building models are translating towards the x or y axis while in shape 3 mode they are twisted. The required mass participation ratio value is reached at the 90% percentage reached at the 8th shape mode for the PKBB and PKBT buildings. While for PKBA it is reached in the 5th shape mode. Deviation values for the three types of building PKBB, PKBT and PKBA are still within the permit limit. Keywords: earthquake, soft storey, spectrum response

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Chanu, Ningthoujam Monika, et Radhikesh Prasad Nanda. « A Proposed Rapid Visual Screening Procedure for Developing Countries ». International Journal of Geotechnical Earthquake Engineering 9, n^o 2 (juillet 2018) : 38–45. http://dx.doi.org/10.4018/ijgee.2018070103.

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Many earthquakes in the past had shown that major damage to structures took place in the absence of proper design, construction, and quality control. Based on the extent of damages caused by earlier earthquakes and the building vulnerability parameters that has caused the damages, a statistical analysis was carried out to develop a vulnerability score sheet. In this score sheet, a vulnerability score is computed considering building attributes such as soft storey, substantial overhang, re-entrant corners, the age of buildings, apparent material and construction quality, eccentric staircase location with respect to building plan, maintenance, soil type and a number of storeys. This score sheet will be a very helpful technique for assessing huge building stocks.

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Yadav, Abhishek, Shobhit Bhardwaj, Zenia Karam et Madhuri Kumari. « Analytical Design of Irregular Buildings founded on soft soil ». IOP Conference Series : Materials Science and Engineering 1197, n^o 1 (1 novembre 2021) : 012015. http://dx.doi.org/10.1088/1757-899x/1197/1/012015.

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Abstract In modern day, due to the need of unique architectural appearance or aesthetics of building, irregularities in mass, stiffness and symmetry may get disturbed, making the whole structure vulnerable to certain damages either minor or major. Some of the functional considerations of these structures are use of ground floor as car parking in residential buildings, use of basement as car parking in malls, etc. Seismic range is one the most important factors to be considered to analyze any irregular structure. In this study, the design of different G+6 structures having vertical regularity was done. These irregular structure models were compared with a regular G+6 structure having similar properties as other structures. For the designing and analysis of these structures, use of StaadPro software was done. It is one of the most used software, whenever it comes to the digital analysis of any structure. Different types of Vertical irregularities like mass irregularity, Vertical Setback Irregularity, Stiffness Irregularity (Discontinuous Column, Middle weak storey and Bottom Weak Storey) were considered for the analysis. The Seismic Zone for the structure is considered to be Delhi (Seismic Zone IV) with a Seismic Factor of 0.24. All the model structures were compared for the parameters of their Storey Drift and Storey Displacement. For irregular buildings though, certain damages/fatigue may be observed in some structures but the structures will not fail and will be serviceable for a long time with proper care. It was observed that the structures with stiffness irregularity showed the most increase in storey displacement and storey drift values.

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T. Sharaf, O. M. Ramadan et S. Elshazly. « Utilizing Steel Brace for Seismic Retrofitting of Old School Buildings with Open Ground Storey ». Electronic Journal of Structural Engineering 19 (1 décembre 2019) : 60–70. http://dx.doi.org/10.56748/ejse.19236.

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This paper investigates the seismic performance of an old school building with open ground storey. The building was designed according to an old Egyptian design code that did not consider the earthquake load; thus, the building is vulnerable to sudden lack of stiffness in the open ground storey (soft storey effect). The first check showed that the building is unable to resist the loads from earthquakes in both longitudinal and transverse directions. Therefore, two retrofitting options were suggested and investigated: using steel bracings; and changing the thickness of some ground floor infill walls. Pushover analyses were conducted to evaluate the building seismic performance. For these analyses, the FEA was applied considering both material and geometric nonlinearities. Both retrofitting methods helped to make the building capable to resist the earthquake loads according to the current Egyptian codes. In particular, retrofitting increased the lateral resistance by up to 55% and 25% in longitudinal and transverse directions, respectively. The research findings facilitate an economical and practical upgrading of many old school buildings without violating their function. Based on authors’ expe-rience, there are hundreds of such school buildings in Egypt alone.

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Ingle, Pradnyanand. « Study of Vertically Irregular Building with Ground Floor Soft Storey ». International Journal for Research in Applied Science and Engineering Technology 8, n^o 6 (30 juin 2020) : 713–19. http://dx.doi.org/10.22214/ijraset.2020.6115.

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Wibowo, A., J. L. Wilson, E. F. Gad, N. T. K. Lam et P. Collier. « Drift Capacity of a Precast Soft-Storey Building in Melbourne ». Australian Journal of Structural Engineering 11, n^o 3 (janvier 2010) : 177–93. http://dx.doi.org/10.1080/13287982.2010.11465065.

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Shaik, mahaboob subhani*, et Budda Beeraiah. « Seismic Evaluation of Multi Storey Building with Ground Soft Story and with Infill Action ». International Journal of Innovative Technology and Exploring Engineering 10, n^o 6 (30 avril 2021) : 22–27. http://dx.doi.org/10.35940/ijitee.f8726.0410621.

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The improvements in (3D) three–dimensional underlying examination and processing assets have permitted the effective and safe plan of taller constructions. These constructions are the outcome of expanding metropolitan densification and financial suitability. The pattern towards continuously taller constructions has requested a move from the conventional strength based plan approach of structures to an emphasis on obliging the general movement of the design. Presently a day's supported cement (RC) divider outline structures are generally suggested for metropolitan development in zones with high SE danger. Presence of shear dividers bestows an enormous solidness to the sidelong power opposing arrangement of the RC building. Appropriate specifying of shear dividers can likewise prompt bendable conduct of such constructions during solid quake shaking. One of the remarkable boundaries impacting the shear divider (SD) SE (SE) conduct outline structures is the SD region proportion. In this manner a scientific examination is performed to assess the impact of Shear Wall Area to floor zone proportion (SW/FZP %) on the SE conduct of multistoried RC structures with delicate story at ground floor. For this reason, 12 structure plans that have Five, Eight and Twelve stories with SW/FZP % going somewhere in the range of 0.70% and 1.31% in the two ways are created. Here, the conduct of these plans under quake stacking is evaluated via doing Response Spectrum Analysis and Linear Time History Analysis utilizing primary examination programming E-TABS. Reaction Spectrum Analysis is finished by SE code IS 1893:2002. Straight Time History Analysis is completed by considering the three ground movement records to be specific Bhuj, Chamba and Uttarkasi. The primary boundaries considered in this investigation are the connection SW/FZP % has with base shear and rooftop dislodging, story uprooting and story float. The logical outcomes demonstrated that building plans with SW/FZP % equivalent to 1% acted sufficiently under tremor loads. Furthermore when the SW/FZP % expanded past 1% it is seen that the improvement of the SE presentation isn't as huge.

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Vignan, G. S., et K. Vasugi. « NON LINEAR ANALYSIS OF DIFFERENT TYPES OF BUILDING WITH SOFT STOREYAND WITHOUT SOFT STOREY ». International Journal of Engineering Applied Sciences and Technology 4, n^o 2 (30 juin 2019) : 186–89. http://dx.doi.org/10.33564/ijeast.2019.v04i02.034.

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Gajbhiye, Akshay. « Comparative Study of RC Multistorey Building with Floating Column and Shear Wall Subjected To Seismic Load ». International Journal for Research in Applied Science and Engineering Technology 9, n^o 9 (30 septembre 2021) : 528–35. http://dx.doi.org/10.22214/ijraset.2021.38011.

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Abstract : In modern multistorey building construction, irregularities like the soft storey, vertical and plan irregularities, floating columns etc are very common. Building with an open ground storey for parking is a common feature that results in floating columns. Floating columns provide column free space and a good aesthetic architectural view of the building. floating column means the end of any vertical element that rests on the beam which leads to discontinuity of columns such that the path of load distribution in multi-storey buildings is disturbed. The use of a floating column also tends to increase the moment in the column, storey shear etc which highly undesirable in seismically active areas. So, the study of the best location where the floating column needs to be provided to reduce the impact due to seismic loads is of primordial importance. Shear wall is a vertical member which is provided from foundation to top storey. In this study shear wall is used in the direction of orientation so that it provides additional strength and stiffness to the buildings. In the present analysis, 8 models are studied. The first model considers a multi-storeyed building without any shear wall and floating column. Other models analysed are with shear wall and by varying the location of floating columns. The analysis and design are done by STAAD.pro V8i SS6 version software and the method used is response spectrum analysis in earthquake zone 4. The effect of floating column location on parameters such as Base shear, Displacement, Maximum moment, storey shear and percentage of steel reinforcement are discussed. The comparison of results of different models is also carried out in detail using graphs and bar charts in this study. The suitable location for providing a floating column with the shear wall is also discussed. Keywords: Floating column, Shear wall, Seismic load, STAAD.pro.v8i, Response Spectrum Analysis.

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Fatahi, Behzad, et S. Hamid Reza Tabatabaiefar. « Effects of Soil Plasticity on Seismic Performance of Mid-Rise Building Frames Resting on Soft Soils ». Advances in Structural Engineering 17, n^o 10 (novembre 2014) : 1387–402. http://dx.doi.org/10.1260/1369-4332.17.10.1387.

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In this study, the effects of Plasticity Index (PI) variation on the seismic response of mid-rise building frames resting on soft soil deposits are investigated. To achieve this goal, three structural models including 5, 10, and 15 storey buildings are simulated in conjunction with a clayey soil representing soil class Ee according to the classification of AS1170.4–2007 (Earthquake actions in Australia) and then varying the Plasticity Index. Structural sections of the selected frames were designed according to AS3600–2009 (Australian Standard for Concrete Structures) after undertaking dynamic analysis under the influence of four different earthquake ground motions. The frame sections are modelled and analysed, employing finite difference method adopting FLAC 2D software under two different boundary conditions: (i) fixed base (no Soil-Structure Interaction), and (ii) flexible base considering soil-structure interaction. Fully nonlinear dynamic analyses under the influence of different earthquake records are conducted and the results in terms of maximum lateral displacements and inter-storey drifts for the above mentioned boundary conditions are obtained, compared, and discussed. Base on the results of the numerical investigations, it becomes apparent that as the Plasticity Index of the subsoil increases, the base shears of mid-rise building frames resting on soft soil deposits increase, while the lateral deflections and corresponding inter-storey drifts decrease. It is concluded that reduction of the Plasticity Index could noticeably amplify the effects of soil-structure interaction on the seismic response of mid-rise building frames.

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Işık, Ercan, Hakan Ulutaş, Ehsan Harirchian, Fatih Avcil, Ceyhun Aksoylu et Musa Hakan Arslan. « Performance-Based Assessment of RC Building with Short Columns Due to the Different Design Principles ». Buildings 13, n^o 3 (13 mars 2023) : 750. http://dx.doi.org/10.3390/buildings13030750.

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Many factors affect the earthquake vulnerability of reinforced concrete (RC) structures, constituting a large part of the existing building stock. Short column in RC structures is one of the reasons for earthquake damage. Significant damages may occur due to brittle fractures in structural elements when the shear resistances are exceeded under the effect of high shear stress in short columns formed due to architectural and topographic reasons. This study created structural models for three situations: the hill slope effect, band-type window and mezzanine floor, which may cause short column formation. The structural analyses by SAP2000 were compared with the reference building model with no short columns. Structural analyses were performed separately according to strength-based and deformation-based design approaches in the updated Türkiye Building Earthquake Code (TBEC-2018). Short column formation; the effects on soft-storey irregularity, the relative storey drifts, column shear force, plastic rotation in columns, roof displacement, base shear force and column damage levels were investigated. As a result of the analysis, it was determined that the relative drifts from the first floor of the building decreased significantly due to the band-type window and slope effect, which caused the second storey to fall into the soft-storey status. In addition, short-column formation caused a significant increase in both plastic rotation demand and shear force in short columns.

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V. Raut, Akshay, et Prof RVRK Prasad. « Pushover Analysis of G+3 Reinforced Concrete Building with soft storey ». IOSR Journal of Mechanical and Civil Engineering 11, n^o 4 (2014) : 25–29. http://dx.doi.org/10.9790/1684-11412529.

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Furtado, André, Hugo Rodrigues, Humberto Varum et Aníbal Costa. « Evaluation of different strengthening techniques’ efficiency for a soft storey building ». European Journal of Environmental and Civil Engineering 21, n^o 4 (28 décembre 2015) : 371–88. http://dx.doi.org/10.1080/19648189.2015.1119064.

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Wibowo, Ari, John L. Wilson, Nelson T. K. Lam et Emad F. Gad. « Collapse modelling analysis of a precast soft storey building in Australia ». Engineering Structures 32, n^o 7 (juillet 2010) : 1925–36. http://dx.doi.org/10.1016/j.engstruct.2010.03.003.

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Banik, Rupak, et Kalai Vani .M. « Analytical Study on Seismic Response with and Without Soft Storeys in Multi-Storey RC Building ». International Journal of Civil Engineering 4, n^o 4 (25 avril 2017) : 19–27. http://dx.doi.org/10.14445/23488352/ijce-v4i4p104.

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TAN, K. H., et T. BALENDRA. « RETROFIT OF EXISTING BUILDINGS FOR EARTHQUAKE RESISTANCE ». Journal of Earthquake and Tsunami 01, n^o 02 (juin 2007) : 161–69. http://dx.doi.org/10.1142/s1793431107000110.

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Buildings sited on soft soils are sometimes subjected to tremors due to earthquakes occurring some 400 to 700 kilometers away as a result of the amplifying effect of soft soils on low-frequency, long-distance waves. This study focuses on the seismic vulnerability of existing reinforced concrete (RC) buildings in Singapore that are designed primarily for gravity loads, and examines the use of externally bonded glass fiber-reinforced polymer (FRP) systems in retrofitting these buildings to resist lateral forces due to seismic action. Two case studies were considered: (1) a four-story frame building, representing typical low-rise buildings; and (2) a 25-story shear wall-frame building, representing typical high-rise buildings. Pushover tests were carried out correspondingly on 1/2-scale sub-frames and 1/5-scale shear walls. The one-and-a-half bay, two-storey frame specimens represent the critical part of the low-rise building while the I-shaped wall specimens represent the lower critical 2.6 stories of the high-rise building. Test results revealed a strong column–weak beam failure mechanism for both the un-retrofitted and retrofitted frames. The retrofitted frame was 30 percent higher in ultimate strength but 12 percent lesser in ultimate drift ratio compared to the un-retrofitted frame. For the wall specimens, sudden failure of the un-retrofitted shear wall was observed at the base of the side walls due to shear. Failure of the retrofitted wall was however more ductile with FRP debonding, followed by concrete crushing and FRP rupture at the compressive base of the side wall. The ultimate load capacity and lateral displacement of the retrofitted wall increased respectively by 45 and 66 percent.

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Patidar, Gaurav, et Ankur Pandey. « Dynamic Analysis of Multi-Storey Buildings of Different Shapes ». International Journal for Research in Applied Science and Engineering Technology 10, n^o 3 (31 mars 2022) : 239–41. http://dx.doi.org/10.22214/ijraset.2022.40595.

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Abstract: The construction of high-rise reinforced concrete buildings, mainly in major cities, is on the flow. So, as the structure becomes tall, it becomes sensitive to lateral loads like wind load and earthquake load. So, it is very important that the building should be safe in dynamic loads because it varies in magnitude with time. This paper presents a summary of research work already done in the seismic & wind analysis of multi-storied buildings with different irregular and complex plan shapes. The effect of shear wall, variation of seismic zone & wind speed also considered along with it. Methods used in the analysis of the seismic & wind analysis for different shaped buildings by different researchers are studied. The Effect of plan shape are studied in this paper in terms of storey drift, lateral displacement, base shear, storey shear, soft storey, axial force, moments, etc. Keywords: Plan irregularity, conventional RC framed, Seismic loading, ETABS, STAAD Pro.

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Swati Nigdikar et V. S. Shingade. « A seismic behavior of RCC high rise structure with and without outrigger and belt truss system for different earthquake zones and type of soil ». World Journal of Advanced Engineering Technology and Sciences 9, n^o 1 (30 juin 2023) : 159–65. http://dx.doi.org/10.30574/wjaets.2023.9.1.0156.

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In the present era, there is more demand for high-rise buildings. The growing de- mand for high-rise buildings brings new difficulties and comes up with new safety precautions. With an increase in height of the structure, its rigidity reduces, making it difficult to withstand earthquake and wind effects, hence some preventative structural systems must be used. Some of them are bracings, shear walls, outrig- ger systems and belt truss systems etc. The outrigger and belt truss system is investigated in this study since it is the most effective method for high-rise buildings and skyscrapers. To prevent story drift and the rotational action of the core caused by seismic and wind forces, the external columns in an outrigger system are attached to the main inner or outer core using outrigger beams, walls, and trusses etc. at various floor levels. All external columns that are situated at the peripheral are connected together with truss elements in a belt truss system. This study investigates the comparison of the behavior of high-rise buildings with and without an outrigger system, and belt truss system for all seismic zones (zone II, III, IV and V) with different types of soil (hard, medium, soft). This study is carried out for 40 story buildings using response spectrum analysis. Analysis of the building is carried out by using ETABS 2018 software. The results are in the form of seismic responses like storey displacement, Storey drift, base shear are studied. Results show that the provision of an outrigger and belt truss system reduces the story displacement of the structure. After analysis and comparing the seismic responses of the structure, the building provided with the combination of outrigger and belt truss system perform better as compared to the only outrigger and belt truss system.

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Kulkarni, Shantanu, et M. V. Waghmare. « Effectiveness of Lateral Load Resisting Systems for Open Ground+20 Storied RC Framed Structure ». International Journal for Research in Applied Science and Engineering Technology 10, n^o 7 (31 juillet 2022) : 4284–92. http://dx.doi.org/10.22214/ijraset.2022.45970.

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Abstract: In a highly populated country like India, problem of parking of the vehicles arises, this problem leaves no option for design of open ground storey buildings. Since there are no infill walls in ground storey, stiffness in the upper storey is much more than the ground storey. The columns in the ground storey are heavily stressed, therefore it is required that the ground storey columns must have sufficient strength and adequate ductility, the increased base shear is resisted entirely by the columns of ground storey only. These buildings are vulnerable due to the sudden lowering of stiffness and strength in the ground storey. This results in the attraction of more earthquake forces for the lower time periods, which also results in snapping of lateral ties in column, crushing of core concrete, buckling of longitudinal bars and finally shear failure in open ground storey columns due to lateral earthquake forces. Solution for this problem is to prevent the failure of open ground storey columns due to lateral earthquake forces by providing the lateral load resisting system. Many times, stiffness of walls is not considered while designing, this results in inaccurate designing of elements. An Open Ground +20 storied RC frame subjected to strong motion earthquakes viz. Duzce in Turkey (12/11/1999), Erzincan in Turkey (13/03/1992), Imperial valley at El-centro (19/05/1940), Landers (28/06/1992) and Nahanni in Canada (23/12/1985) creating soft storey effect at ground storey so it should be provided with lateral load resisting systems viz, Shear wall, steel bracing, lead rubber bearing base isolator with different configurations. Performance of equivalent diagonal strut provided to structure is compared with brick work modelled as actual brick work, equivalent diagonal struts, and considering only the mass of brick work. Time History Analysis is used in a RC framed building using ETABS Version18 and SAP2000 Version20 software in comparison with Response quantities Roof displacement, soft storey check, Base shear, overturning moment and storey drift. In this research, equivalent diagonal struts are provided as brick masonary, which shows accurate behavior of structure under strong ground motions as mass and stiffness both are considered during analysis. When Open ground storied structure is subjected to strong ground motions, stiffness at ground storey is drastically reduced. When structure is assigned with Lateral Load Resisting Systems, shear wall with configuration shear wall at ground storey and 1st storey, stiffness at ground storey is increased to 81% and 82% in X and Y direction respectively within permissible limits. Hence it can be concluded that when there is soft storey effect at open ground, structure becomes hazardous in presence of strong ground motions. When structure is subjected to strong ground motions, the vulnerability condition is high. Since we have performed non-linear dynamic time history analysis, more accurate results can be obtained as non-linear analysis considers vertical irregularities

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Krishna, T. G. N. C. Vamsi, V. Amani, P. S. Sunil Kumar*, CH Naveen Kumar et M. Srinivas. « Dynamic Seismic Analysis and Design of R.C.C Multi Purpose Building (G+15) By using E-Tabs ». International Journal of Innovative Technology and Exploring Engineering 10, n^o 10 (30 août 2021) : 84–91. http://dx.doi.org/10.35940/ijitee.j9418.08101021.

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An earthquake is a sudden, rapid shaking of the earth caused by the breaking and shifting of rock beneath the earth’s surface. Earthquakes are among the most powerful events on earth, and their results can be terrifying. In0general for0design of tall0buildings both0wind as well0as earthquake0loads need0to be0considered. Governing0criteria for0carrying out0dynamic analyses0for earthquake0loads are different0from wind0loads. However many tall buildings are not so resistant in lateral loads due to earthquake. Reinforced concrete multi-storied buildings in India were for the first time subjected to a strong ground motion shaking in Bhuj earthquake. It has been concluded that the principal reasons of failure may be attributed to soft stories, floating columns, mass irregularities, poor quality of construction materials faulty construction methods, unstable earthquake response, soil and infrastructure, which were determined to cause damage to the attached structure. High-rise buildings are in high demand due to global urbanization and population growth, and high-rise buildings are likely to suffer the most damage from earthquakes. Since earthquake forces are irregular and unnatural in nature, engineering tools need to be sharpened to analyze the structure in the work of these forces. In this study, to understand the behaviour of structure located in seismic zones III for G+15 Multi-Purpose storey building model is considered for study. Performance of frame is studied through Response Spectrum analysis and comparison is made on shear force, storey drift, storey displacement and storey stiffness.

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., Bhakti N. Harne. « REVIEW ON SEISMIC PERFORMANCE OF MULTI-STORIED RC BUILDING WITH SOFT STOREY ». International Journal of Research in Engineering and Technology 04, n^o 05 (25 mai 2015) : 411–14. http://dx.doi.org/10.15623/ijret.2015.0405076.

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Ilyichev, Vyacheslav, Nadezhda Nikiforova et Artem Konnov. « Construction of high-rise building with underground parking in Moscow ». E3S Web of Conferences 33 (2018) : 02057. http://dx.doi.org/10.1051/e3sconf/20183302057.

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Paper presents results of scientific support to construction of unique residential building 108 m high with one storey underground part under high-rise section and 3-storey underground parking connected by underground passage. On-site soils included anthropogenic soil, clayey soils soft-stiff, saturated sands of varied grain coarseness. Design of retaining structure and support system for high-rise part excavation was developed. It suggested installation of steel pipes and struts. Construction of adjacent 3-storey underground parking by “Moscow method” is described in the paper. This method involves implementation of retaining wall consisted of prefabricated panels, truss structures (used as struts) and reinforced concrete slabs. Also design and construction technology is provided for foundations consisted of bored piles 800 MM in diameter joined by slab with base widening diameter of 1500 MM. Experiment results of static and dynamic load testing (ELDY method) are considered. Geotechnical monitoring data of adjacent building and utility systems settlement caused by construction of presented high-rise building were compared to numerical modelling results, predicted and permissible values.

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Wahid, Chowdhury Mohammad Shams, Uwe E. Dorka, Md Jahir Alam et Md Rafiqul Islam. « APPLICATION OF HYDE SEISMIC PROTECTION SYSTEM IN MEDIUM RISE RC BUILDINGS WITH SOFT STOREY IN BANGLADESH ». Malaysian Journal of Civil Engineering 34, n^o 2 (27 juillet 2022) : 29–36. http://dx.doi.org/10.11113/mjce.v34.18372.

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Bangladesh has a long history of earthquakes and the largest one that occurred here is of 8.7 magnitudes Great Indian Earthquake. Several international researchers showed the possibility of large earthquake to occur in this area in near future, which will cause damages of infrastructures resulting in loss of human lives. It has been observed that most of the existing medium rise reinforced concrete (RC) buildings in the urban areas of Bangladesh have soft ground floor which have been designed without following proper seismic design code, hence do not full fill the demand strength required against an earthquake. These existing medium rise RC buildings with soft ground floor need to be retrofitted with a suitable technique. In this study the performance of Hysteretic Device (HYDE) system in a medium rise RC building selected from an urban area of Bangladesh is checked by SAP 2000v15 software. HYDE is a passive control system especially developed for soft storey seismic control of medium rise building structure. A nonlinear time history analysis is performed using three earthquake data developed from normalized acceleration response spectra to check the performance of HYDE. From the analysis, design HYDE force is achieved as 6300 kN. It has been observed from the generated HYDE curve that, the overall horizontal displacement against the seismic force is reduced from 0.176 m. to 0.035 m. Which means, by the application of HYDE system, 80% of displacement can be reduced.

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Jiménez, Guillermo A. López, et Daniel Dias. « Dynamic Soil–Structure Interaction Effects in Buildings Founded on Vertical Reinforcement Elements ». CivilEng 3, n^o 3 (27 juin 2022) : 573–93. http://dx.doi.org/10.3390/civileng3030034.

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Pile foundation is an effective technique to support buildings in the presence of soft soil and seismic areas. More recently, the rigid inclusions system has also been utilized for founding buildings. Both systems increase the bearing capacity of the soil and allow reducing the total and differential settlements in the structure. However, the study of these systems in a complete and accurate way implies the consideration of the soil–structure interaction (SSI). In order to investigate the impact of different pile toe conditions (including the placement on hard soil, an anchorage and floating piles) in the response of mid-rise buildings, numerical models with a 5-storey frame building founded on the inclusions system (soil–inclusion–platform–structure) are analyzed and compared with the pile system (soil–pile–structure). Fully coupled finite difference numerical models were developed using Flac 3D. The influence of the dynamic characteristics of the structure was considered analyzing buildings with different heights (3 storeys to 7 storeys). The linear elastic perfectly plastic model with a Mohr–Coulomb failure criterion is used to represent the behavior of the soil. Values of the maximum lateral displacements, of the inter-storey drifts and of the shear forces distribution in the buildings, as well as the rocking of the foundation, are presented. Concerning the foundations, efforts and displacements are compared for the different systems. The results show that the type of support condition influences the seismic response of the building and the efforts and displacements in the rigid elements, depending on the foundation system. The efforts at the toe level in the rigid elements are highly influenced by the support conditions, but there is only a slight influence from the head connection.

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Y.M. Abdlebasset, E.Y. Sayed-Ahmed et S. A. Mourad. « Seismic Analysis of High-Rise Buildings with Transfer Slabs : State-ofthe- Art-Review ». Electronic Journal of Structural Engineering 16 (1 janvier 2016) : 38–52. http://dx.doi.org/10.56748/ejse.16209.

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In many high-rise buildings, architectural requirements may result in a variable configuration for the vertical structural elements between the stories of the building. To accommodate such vertical elements’ discontinuity, a “transfer” floor conveying vertical and lateral loads between upper and lower stories must be introduced. A drawback of the transfer floor is the sudden change in the building's lateral stiffness at its level: the structure becomes susceptible to the formation of a soft-storey mechanism under moderate to severe earthquakes. These buildings generally showed conventional elastic behavior for frequent earthquake but suffer extensive crack in the vicinity of transfer floors for rare earthquake. In this paper, a state of the art review is presented on recent publications dealing with the seismic behavior of high rise buildings with transfer floor.

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Sayeed, Md Moavia, Dr Abhay Kumar Jha et Barun Kumar. « Study of Structural Performance of Multi-Storey Regular and Irregular RC Buildings Located in Zone III Under Seismic Loads ». International Journal for Research in Applied Science and Engineering Technology 10, n^o 8 (31 août 2022) : 845–47. http://dx.doi.org/10.22214/ijraset.2022.46283.

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Abstract: this analysis shows it is based on carrying the foundation of the shear and the level of performance of the building under the Indian severe zone. The result marks the conclusion that, in the case of a building with poorly constructed strength, it provides stability and attracts the storey shear. The soft computer software and commercial software CSI-ETABS is used for modeling and analysis

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Saidi, Taufiq, Teuku Budi Aulia, Bambang Setiawan, Nora Abdullah et Muttaqin Hasan. « Spectral displacement (SD) of banda aceh’s soft soil for seismic vulnerability assessment ». MATEC Web of Conferences 197 (2018) : 10001. http://dx.doi.org/10.1051/matecconf/201819710001.

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Reliable spectral displacement (SD) in a wide range of response periods is crucial in seismic vulnerability assessment for Banda Aceh-Indonesia as the city is founded on a thick-soft soil. This SD is excellent for estimating building drift ratio from which the vulnerability of building is assessed. SD can be obtained from conversion of the acceleration spectra (converted SD) and site response analysis (analyzed SD). In this paper, both converted- and analysed-SDs are developed for Banda Aceh’s soft soil case using three historical seismic events of the 2012 Simeulue II, the 2013 Mane-Geumpang, and the 2013 Bener Meriah earthquakes and three soil models from which acceleration-displacement response spectrum (ADRS) of Banda Aceh’s soft soil is proposed. This proposed ADRS is compared to the generic response spectra of Centre of Research and Development of Housing and Settlement (PUSKIM) Indonesia. It can be concluded that the Proposed ADRSs can be used as another source in determining the performance of a building beside the PUSKIM ADRSs. Furthermore, the developed SDs were used to calculate the drift of 2-, 3-, and 4-storey typical shop-house buildings at Banda Aceh-Indonesia.

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Zengin, Başak. « Evaluation of the period and soft story conditions of reinforced concrete buildings with and without infill walls ». Challenge Journal of Structural Mechanics 7, n^o 3 (15 septembre 2021) : 151. http://dx.doi.org/10.20528/cjsmec.2021.03.004.

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Since the ground floor of most of the buildings in our country is designed as a shop or ground floor (in the buildings created as a workplace), there is very little infill wall ratio on the ground floors due to architectural and functional reasons, and some of them do not even exist at all. However, infill walls significantly increase the horizontal rigidity and strength of the structure, thus causing a decrease in the period value that determines the earthquake loads that will affect the structure. However, the infill wall meets the first destructive forces of the earthquake, and during this time, it cracks and absorbs some of the earthquake energy. The structural system elements of the building (columns and shear walls) start to meet the earthquake forces only when the infill walls are damaged and fail. In this direction, the aim of this study is to investigate to what extent the amount of infill wall on the ground floor affects the period of the building, and whether there are soft storey irregularities in the building according to the change in the amount of infill wall on the ground floor. In this study, while there are infill walls on all floors and all axes of buildings of various heights (3, 6, 9 and 11 floors), the amount of infill walls in the x and y directions on the ground floors is reduced to a certain extent, and many models are created until the ground floor is completely without infill walls. All these models created were analyzed with the support of the SAP2000 program, and the period values were determined and examined according to the soft storey problems and compared with the case of the entire building with and without infill walls. In addition, it was examined whether the period formulas determined as a result of the studies and taking into account the infill wall give realistic results for the situation examined in this study.

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Song, Rong Fang, Ling Yun Lang et Jing Wang. « Application of Long-Short-Pile Composite Foundation of High-Rise Building in Soft Soil ». Applied Mechanics and Materials 256-259 (décembre 2012) : 57–60. http://dx.doi.org/10.4028/www.scientific.net/amm.256-259.57.

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A case of the long-short-pile composite foundation in liquefied soft soil under a 30-storey high-rise building is presented, in which the long and short piles are made of cement-flyash-gravel (CFG) and lime. A new design calculation method of bearing capacity and settlement of composite foundation is introduced, and the calculated value is compared with the actual measurement. The results show that the liquefaction of soft ground is eliminated and the demand of load and settlement for upper building is met. At the same time, it is proved that the design method is feasible.

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Ye, Yan Xia, Hua Huang et Dong Wei Li. « Analysis on the Effect of Filler Wall to the Dynamic Characteristics and Storey Displacement of RC Frame Structure ». Advanced Materials Research 255-260 (mai 2011) : 644–48. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.644.

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Comparative analyses of twenty-eight finite element structures with filler walls were established to study dynamic characteristics of RC frame structures under seismic waves. The results of these analyses show that filler walls have little influence on vibration modes of the structure. But as a result of soft storey in the bottom of building caused by reduction of the filler walls, vibration modes have a great influence. As the stiffness of filler wall decrease, the stiffness of soft storey decrease shapely, vibration mode curve becomes much smoother. Considering the filler wall has influence on the vibration periods of framework, the reduction factor of 0.7 should be taken. The influence of filler wall to the value of lateral drift and storey displacement angle of frame can not be ignored. The main effect factors to the dynamic characteristics of framework are included quantity, location, material of the fill wall and the selection of seismic waves.

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Gómez, Lucía Valentina Díaz, Oh-Sung Kwon et Mohammad Reza Dabirvaziri. « Seismic fragility of steel moment-resisting frames in Vancouver and Montreal designed in the 1960s, 1980s, and 2010 ». Canadian Journal of Civil Engineering 42, n^o 11 (novembre 2015) : 919–29. http://dx.doi.org/10.1139/cjce-2014-0492.

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Typical steel moment-resisting frames (MRF) of six-storey buildings in Vancouver and Montreal were designed for three different provisions of the National Building Code of Canada (1960s, 1980s, and 2010). Numerical models were developed in OpenSees to understand the seismic performance of the structures. These models accounted for strength and stiffness degradation through appropriate representations of the beam–column connection behaviours, which were calibrated against experimental results available in the literature. The behaviour of the buildings was evaluated through pushover and nonlinear time history analyses. The pushover analysis results showed that the 1960s and 2010 steel MRFs of both cities exhibited strong-column-weak-beam failure mode. The 1980s steel MRFs of both cities showed soft-storey mechanism. Fragility curves were developed for the steel MRFs based on the seismic demands evaluated using nonlinear time history analyses, which can be used for regional seismic impact assessment studies in the future.

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Goswami, Pranamee. « Behavior of Drift in a Soft Storey Building with Masonry and Steel Bracings ». International Journal for Research in Applied Science and Engineering Technology 8, n^o 9 (30 septembre 2020) : 972–80. http://dx.doi.org/10.22214/ijraset.2020.31631.

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Kapase, Rahul, Mukund Pawar, M. M. Deshmukh et S. B. Talavara. « Effect of Seismic Retrofitting on R.C. Building with Soft Storey and Floating Column ». International Journal of Engineering Trends and Technology 46, n^o 7 (25 avril 2017) : 367–71. http://dx.doi.org/10.14445/22315381/ijett-v46p262.

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Satyanarayana, K. Vamsi, et Vinodh kumar. « Seismic Response of Rc Frame Building With Soft Storey At Different Floor Levels ». International Journal of Engineering Trends and Technology 42, n^o 4 (25 décembre 2016) : 201–7. http://dx.doi.org/10.14445/22315381/ijett-v42p240.

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Amrapali Kasabe et Vaibhav Shelar. « Pushover analysis of building using soft story at different levels ». World Journal of Advanced Engineering Technology and Sciences 9, n^o 1 (30 juin 2023) : 203–10. http://dx.doi.org/10.30574/wjaets.2023.9.1.0160.

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In India the enormous loss of life and property perceived in the last couple of decades, attributable to failure of structures instigated by earthquakes. Responsiveness is now being given to the assessment of the sufficiency of strength in framed RCC structures to resist solid ground motions. The seismic reaction of RCC building frame in terms of performance point and the earthquake forces on Reinforced building frame with the help of pushover analysis is carried out in this project. In this method of analysis a model of the building is exposed to a lateral load. Pushover analysis can afford a substantial insight into the weak links in seismic concert of a structure and we can know the weak zones in the structure. In this project effort has been made to investigate the effect of Shear Wall and Structural Wall on lateral displacement and Base Shear in RCC Frames. RCC Frames with G+13 are considered, one with soft storey and other with normal building in L- shape. The pushover analysis of the RCC building frame is carried out by structural analysis and design software ETABS.

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Articles de revues sur le sujet « SOFT STOREY BUILDING »

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