Journal articles: 'IRREGULAR REINFORCED CONCRETE STRUCTURE'

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Zhang, Fang. "The Modal Analysis of a Multilayer Concave-Convex Irregular Reinforced Concrete Frame Structures before and after Seismic Isolation." Applied Mechanics and Materials 339 (July 2013): 632–34. http://dx.doi.org/10.4028/www.scientific.net/amm.339.632.

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It used lead core type laminated rubber pad as a base isolation device. Using the ANSYS software, it analyzed the modality of a multilayer concave-convex irregular reinforced concrete frame structures before and after seismic isolation. Comparison of the cycle, frequency and modal participation mass coefficient of the multilayer concave-convex irregular reinforced concrete frame structure before and after isolation in Kobe wave. It concluded that the lead laminated rubber bearings for multilayer concave-convex irregular reinforced concrete frame structures have seismic isolation effect.

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Men, Jin Jie, Qi Zhou, and Qing Xuan Shi. "Fragility Analysis Method for Vertically Irregular Reinforced Concrete Frame Structures." Key Engineering Materials 400-402 (October 2008): 587–92. http://dx.doi.org/10.4028/www.scientific.net/kem.400-402.587.

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This paper concentrates on the fragility analysis method for vertically plan reinforced concrete frame structures. The weakness story inter-story drift ratio is selected as the fragility variable for vertically plan structures. Five states are established to distinguish the structural seismic performance levels, which are expressed with inter-story drift ratio. Then through the nonlinear dynamic analysis and linear regress, the exceeding probability function of seismic response is obtained and a new fragility analysis method is put forward for vertically irregular frame structures. Two kind of unit models, two kind of hysteretic models and forty earthquake records are chosen to established structure-earthquake system samples. Thus one hundred and twenty structure-earthquake system samples are obtained for irregular reinforced concrete frame, which take into account the uncertainty of member materials, structures systems, numerical simulation models and earthquake motions adequately. Then example is presented to demonstrate the applicability and utility of the proposed methodology. Seismic performances of a vertically irregular reinforced concrete frame structure are evaluated in detail. It is concluded that fragility curves are more abrupt in low input earthquake motion intensity and they are influenced much by the structural performance levels.

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B M, Gagan. "Progressive Collapse Analysis of Irregular Reinforced Concrete Framed Structure." International Journal for Research in Applied Science and Engineering Technology 7, no. 5 (May 31, 2019): 2175–80. http://dx.doi.org/10.22214/ijraset.2019.5365.

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Datta, D., and A. L. Nanda Gopal. "Behaviour of Irregular Reinforced Concrete Frames under Seismic Loading." Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2 1, no. 1 (December 19, 2022): 941–51. http://dx.doi.org/10.38208/acp.v1.605.

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The present world demands the multi storey buildings due to lack of space availability in the urban areas to accommodate the increased population with their proposed requirements. Multi-storey building’s behaviour during high seismic action depends mainly on Structural configuration. Structural configuration having any discontinuities in plan or in elevation are termed as building with irregularities. When these irregularities are present in the structure, buildings suffer much more damage during strong earthquake excitations which was recorded in the past. The Irregularities are defined as per IS:1893 (Part 1)-2016 code. This paper is concerned about the various types of plan, vertical and combined irregularities and their effect under seismic loading. The objective of the present study is doing linear static and dynamic analysis i.e., ESA and RSA on various irregular building frames and calculating their response using some seismic parameters like displacement response, storey drift, inter storey drift ratio and base shear for which the frames are designed using IS 456-2000 and special detailing for fulfilling the ductility requirement is done as per IS: 13920-2016. Comparison of the results of analysis in X and Y directions of irregular structures is done with regular structure. The scope of the present study also includes the maximum and minimum effect on the various types of irregular structures under seismic loading and to know if the presence of irregularities always amplifies the response or not.

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Yolanda, Ardian, Zulfikar Djauhari, Ridwan, and Enno Yuniarto. "Progressive collapse of regular and irregular reinforced concrete moment frame." MATEC Web of Conferences 276 (2019): 01035. http://dx.doi.org/10.1051/matecconf/201927601035.

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A technique to evaluate the potential progressive collapse of reinforced concrete structure was conducted in this study. The analysis involved the removal of several columns on critical location of the building according to General Services Administration (GSA) 2013 provision. In each analysis, the demand-capacity ratios (DCRs) of structural elements were examined and compared to the defined acceptance criteria. To avoid structural building collapse progressively, DCR ratio of regular and irregular buildings should be less than 2 and 1.5, respectively. The result showed that the structure did not collapse with the removal single column only. Further to this finding, several columns need to be removed so that it collapsed progressively. In the case of regular structure, progressive collapse occurred after removing five columns on the side of the regular structure, with the maximum DCR of 4.66. In the case of irregular structure, progressive collapse occurred after removing four columns on the horizontal side in the middle of structure with the maximum DCR of 3.44.

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Hiwase, Prashant, Vipul V. Taywade, and Sharda P. Siddh. "Comparative analysis of vertical irregularities on high rise structure considering various parameters." IOP Conference Series: Materials Science and Engineering 1197, no. 1 (November 1, 2021): 012024. http://dx.doi.org/10.1088/1757-899x/1197/1/012024.

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Abstract Now, every day tall constructing structures constructed around the goal of residential and industrial cause etc. Layout of tall buildings both earthquake as well as wind loads got to be take into considered. An irregular structure, failure of structure starts at a point of its weakness and those weaknesses comesups withs separation of mass, stiffness and geometry of that models. The structures having this kinds of discontinuity are called Irregular structures. (H, J, & darshan, 2017) [2]. For example,Structures with the soft storey were the foremost remarkable fallen structures. Therefore, the impact of vertical alignment within the seismic structure of buildings is very significant. The changes in durability and size provide powerful features of those structures that are completely different from the standard structure. For this present evaluation ‘ETABS’ software package is employed. All Reinforced Concrete structural elements are follows as per ‘IS 456:2000 (Plane and Reinforce Concrete-Code of Practice, Bureau of Indian Standard)’. Seismic load follows with respect to IS 1893:2016 along with self-weight of modelles for analysis of the structure. Here 2 kinds of buildings of (G+15) were created one is regular structure and alternative one Mass irregular. To observe, Effect of lateral in both buildings using Seismic load and to check the results,most of maximum displacement for various models and various parameters.

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Sadat, Zakia, and Abdussamet Arslan. "Automatic Minimization of the Drift Performance of RC 3D Irregular Buildings Using Genetic Algorithm." Advances in Civil Engineering 2023 (April 27, 2023): 1–12. http://dx.doi.org/10.1155/2023/8275138.

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This study introduces the application of genetic algorithms for the optimal design of the seismic torsional drift performance of three-dimensional reinforced concrete buildings. Attempts have been made to achieve an optimal automatic design of the torsional drift of the storeys of reinforced concrete buildings with plan irregularities to build torsional balanced structures. The storey torsional drift response generated by static and dynamic loads can be clearly expressed in terms of vertical structure elements’ sizing design variables. Two examples are provided to demonstrate the efficiency and practicability of the proposed optimum design approach. The performance of the structures was assessed as per the procedure prescribed in modern seismic code languages. Mathematical and finite element modelling were used to perform seismic analysis on buildings. MATLAB® programming was used as a solution to the sizing optimization problem. The results confirmed the proposed genetic algorithm’s ability to find efficient optimum solutions to three-dimensional reinforced concrete structures through the problem of size optimization.

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Trivedi, Abhay, Dr Gunjan Shrivastava, and Kishor Patil. "Seismic Analysis of Irregular Diaphragm Reinforced Concrete Building with Fluid Viscous Dampers." International Journal for Research in Applied Science and Engineering Technology 11, no. 7 (July 31, 2023): 1970–76. http://dx.doi.org/10.22214/ijraset.2023.55029.

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Abstract: Fluid viscous damper is the most commonly used tool for controlling structures’ responses. Fluid viscous dampers with different construction technologies are applied in order decrease the responses of structures to the seismic vibrations. During the recent years, controlling structure has turned into a scientific technology to protect structures against wind and earthquake loads. In the present study linear dynamic and non-linear static analysis was adopted to assess the seismic performance of an irregular diaphragm building. Building with and without fluid viscous damper have been taken.The outcomes of the study will be beneficial to assess the performance of existing building vulnerable to seismic loads after the installation of fluid viscous dampers.

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Das, Satrajit, and James M. Nau. "Seismic Design Aspects of Vertically Irregular Reinforced Concrete Buildings." Earthquake Spectra 19, no. 3 (August 2003): 455–77. http://dx.doi.org/10.1193/1.1595650.

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Seismic building codes such as the Uniform Building Code (UBC) do not allow the equivalent lateral force (ELF) procedure to be used for structures with vertical irregularities. The purpose of this study is to investigate the definition of irregular structures for different vertical irregularities: stiffness, strength, mass, and that due to the presence of nonstructural masonry infills. An ensemble of 78 buildings with various interstory stiffness, strength, and mass ratios is considered for a detailed parametric study. The lateral force-resisting systems (LFRS) considered are special moment-resisting frames (SMRF). These LFRS are designed based on the forces obtained from the ELF procedure. The results from linear and nonlinear dynamic analyses of these engineered buildings exhibit that most structures considered in this study performed well when subjected to the design earthquake. Hence, the restrictions on the applicability of the equivalent lateral force procedure are unnecessarily conservative for certain types of vertical irregularities considered.

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Botis, Marius Florin, and Camelia Cerbu. "A Method for Reducing of the Overall Torsion for Reinforced Concrete Multi-Storey Irregular Structures." Applied Sciences 10, no. 16 (August 11, 2020): 5555. http://dx.doi.org/10.3390/app10165555.

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The uneven distributions of mass and stiffness in the case of multi-storey concrete buildings lead to a torsion sensitivity of those civil structures under dynamical loadings like earthquakes or wind and gusts. In order to minimize the overall torsion, it is imperatively necessary to reduce the distance between the centre of mass (CM) and centre of stiffness (CS) in the design stage. In this context, the main purpose of this paper is to present a theoretical method of reducing torsion by minimizing the distance between CM and CS at the level of each floor of the structure. Principal stiffness axes are also changed in convenient directions so that the movement of the structure leads to a favourable plastic mechanism in the fundamental mode of vibration. To achieve the goal, the main objective is to change the dimensions and orientations of the pillars located on the perimeter of the structures. The described method was used to study: irregular shaped structures in plan; structures with stairs or with central concrete core; structures with elevation retractions. The overall torsion reducing was achieved with Matlab programs, and the verification of the results was carried out by using the software ETABS 2016.

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Qin, Kai, and Fu Ma. "Reinforced Concrete Frame - Shear Wall Structure, Floor Open Hole Static Finite Element Analysis." Advanced Materials Research 788 (September 2013): 521–24. http://dx.doi.org/10.4028/www.scientific.net/amr.788.521.

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along with the diversification of architectural image and the construction of complicated functions, there are more and more irregular buildings. Floor open hole especially floor open hole is the typical representative of irregular buildings. Floor open hole lead to floor in-plane rigidity weakening that open hole level stiffness drop form weak layer, the structure of the center of mass and centroid offset weak layer is larger, so in the earthquake under the action of stress is more complicated. Large-scale finite element software ANSYS is applied in this article simplified single documents across the floor in the middle of the hole structure is simulated and analyzed under the static load of open hole plate, beam and column structure deformation and stress distribution, and will not open holes in the floor and open hole in the floor slab under the action of horizontal static stress were analyzed.

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Gao, Qiong Yao, and Hao Wei Kuang. "Structural Design of Gymnasium of Diannan Green Hotel." Applied Mechanics and Materials 584-586 (July 2014): 1885–88. http://dx.doi.org/10.4028/www.scientific.net/amm.584-586.1885.

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Gymnasium of Greenlake View Hotel, including all kinds of complicated function, is the key seismic precautionary category building. The structure is characteristic of over-length, irregular plane and irregular elevation. Reinforced concrete frame form is adopted according to plane form and use function. The weak areas have been found by analysis, comparison and review of calculation based on multiple structural analysis programs. Finally, we can guarantee the security of structure in two ways: one is strengthening the weak areas by adopting some measures; the other is executing strictly all indicators of standards.

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de Angelis, Fabio, and Donato Cancellara. "Seismic Vulnerability of Existing RC Buildings and Influence of the Decoupling of the Effective Masonry Panels from the Structural Frames." Applied Mechanics and Materials 256-259 (December 2012): 2244–53. http://dx.doi.org/10.4028/www.scientific.net/amm.256-259.2244.

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In the present work we discuss on the seismic vulnerability of reinforced concrete existing buildings. In particular we consider a reinforced concrete building originally designed for only gravitational loads and located in a zone recently defined at seismic risk. According to the Italian seismic code NTC 2008 a displacement based approach is adopted and the N2-method is considered for the nonlinear seismic analysis. In the analysis all the masonry infill panels in effective interaction with the structural frame are considered for the nonlinear modeling of the structure. The influence of the effective masonry infills on the seismic response of the structure is analyzed and it is discussed how the effect of the masonry infills irregularly located within the building can give rise to a worsening of the seismic performance of the structure. It is shown that in the present case a not uniform positioning of the masonry infills within the building can give rise to a fragile structural behavior in the collapse mechanism. Furthermore a comparative analysis is performed by considering both the structure with the effective masonry infills and the bare structural frame. For these two structures a pushover analysis is performed, the relative capacity curves are derived and it is shown that fragile collapse mechanisms can occur depending on the irregular positioning of the effective masonry infills. Accordingly it is discussed how in the present case a decoupling of the effective masonry infills from the structural frame can give rise to a smoother response of the capacity curves. For the examined case of an obsolete building with irregular positioning of the masonry panels, the choice of decoupling the effective masonry panels from the structural frame may facilitate the retrofitting strategies for the achievement of the proper safety factors at the examined limit states.

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de Angelis, Fabio, and Donato Cancellara. "Seismic Vulnerability of Existing RC Buildings and Influence of the Decoupling of the Effective Masonry Panels from the Structural Frames." Applied Mechanics and Materials 268-270 (December 2012): 646–55. http://dx.doi.org/10.4028/www.scientific.net/amm.268-270.646.

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In the present work we discuss on the seismic vulnerability of reinforced concrete existing buildings. In particular we consider a reinforced concrete building originally designed for only gravitational loads and located in a zone recently defined at seismic risk. According to the Italian seismic code NTC 2008 a displacement based approach is adopted and the N2-method is considered for the nonlinear seismic analysis. In the analysis all the masonry infill panels in effective interaction with the structural frame are considered for the nonlinear modeling of the structure. The influence of the effective masonry infills on the seismic response of the structure is analyzed and it is discussed how the effect of the masonry infills irregularly located within the building can give rise to a worsening of the seismic performance of the structure. It is shown that in the present case a not uniform positioning of the masonry infills within the building can give rise to a fragile structural behavior in the collapse mechanism. Furthermore a comparative analysis is performed by considering both the structure with the effective masonry infills and the bare structural frame. For these two structures a pushover analysis is performed, the relative capacity curves are derived and it is shown that fragile collapse mechanisms can occur depending on the irregular positioning of the effective masonry infills. Accordingly it is discussed how in the present case a decoupling of the effective masonry infills from the structural frame can give rise to a smoother response of the capacity curves. For the examined case of an obsolete building with irregular positioning of the masonry panels, the choice of decoupling the effective masonry panels from the structural frame may facilitate the retrofitting strategies for the achievement of the proper safety factors at the examined limit states.

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Oyguc, Resat, Cagatay Toros, and Adel E. Abdelnaby. "Seismic behavior of irregular reinforced-concrete structures under multiple earthquake excitations." Soil Dynamics and Earthquake Engineering 104 (January 2018): 15–32. http://dx.doi.org/10.1016/j.soildyn.2017.10.002.

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Neelavathi, S., K. G. Shwetha, and C. L. Mahesh Kumar. "Torsional Behavior of Irregular RC Building under Static and Dynamic Loading." Materials Science Forum 969 (August 2019): 247–52. http://dx.doi.org/10.4028/www.scientific.net/msf.969.247.

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In the present situation the growth of population is increasing rapidly. In view of this, the development of the buildings are changing its dimension to high rise structures further having trends of structural irregularities. These kinds of irregularities in the structure cannot be avoided as it is more vulnerable to the seismic actions. The structure fails by the uneven moments created by the seismic actions because of the irregularities in the structure which is based on the parameters like storey drift, displacement, torsional effects etc., In this paper the effects of the torsional irregularity is studied and the failure has been minimized by adding necessary elements like shear wall and bracings where ever required. In Present study we have considered the 20 storey building of reinforced concrete structure which includes five models of different regular and irregular shaped structures which are subjected to earthquake load and are modeled by using ETABS version 9. Analysis results elaborate the parameters like displacement, time period, storey drift and comparisons of the results among the set of models.

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Choudhury, Trishna, and Hemant B. Kaushik. "Component Level Fragility Estimation for Vertically Irregular Reinforced Concrete Frames." Journal of Earthquake Engineering 24, no. 6 (March 22, 2018): 947–71. http://dx.doi.org/10.1080/13632469.2018.1453413.

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Nady, Omar, Sameh Youssef Mahfouz, and Salah El-Din Fahmy Taher. "Quantification of Vertical Irregularities for Earthquake Resistant Reinforced Concrete Buildings." Buildings 12, no. 8 (August 3, 2022): 1160. http://dx.doi.org/10.3390/buildings12081160.

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In modern urban construction, irregular buildings are increasingly constructed to fulfill architectural and functional requirements. However, these buildings revealed unfavorable seismic performance during the past earthquake records. When the seismic design codes deal with the issue of building irregularity, little attention is paid to the location of irregularity. In the current study, a detailed structural analysis was performed to investigate the effects of the location of mass, stiffness, setback, and combined irregularities on the structural seismic response of twelve irregular building models. Based on the dynamic properties of the building, an irregularity index is proposed to quantify the effects of the magnitude and location of various types of vertical irregularities. The proposed index was able to successfully quantify all types of vertical irregularities.

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Bekele, Bereket Netsanet. "Effect Of Vertical Irregularity On Fundamental Period And Stability Of Reinforced Concrete Building." Journal of University of Shanghai for Science and Technology 24, no. 02 (February 9, 2022): 147–56. http://dx.doi.org/10.51201/jusst/22/0172.

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Now a day, many building have not regular configuration both in plan and in elevation due to different functional and aesthetic requirements. Hence, the evaluation of the seismic behavior of reinforced concrete building with plan and elevation irregularity is required. In this study the evaluation of the effect setback irregularity on fundamental and stability of reinforced concrete. The standards used for analysis of base case building and vertical irregular building using response spectrum analysis (RSA) method are adopted according to the provision of ES EN 1998-1:2015. The evaluation of fundamental period and stability based on the value of sensitive inter-story drift were assessed in detail using seven different building. Story eight and Story twelve reinforced concrete building with different setback irregularity were selected and their responses were compared with the ones of a corresponding base case was done using ETABS 2016.1.0 software. The setback of building is formed by the abrupt reduction in different floor area along the height of the building. The fundamental period and stability of setback buildings was found to be significantly different from the base case building, according to the findings of this study. It was discovered that the fundamental period of rigidity irregular buildings is longer than that of equivalent regular buildings. The fundamental period of a setback structure is shorter than that of a comparable regular structure. The findings reveal that the seismic response variation of setback building from the base case is dependent not only on the size of the irregularity, but also on the placement of the irregularity.

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Wang, Min, Dichuan Zhang, and Jainping Fu. "Experimental evaluation of seismic response for reinforced concrete beam–column knee joints with irregular geometries." Advances in Structural Engineering 19, no. 12 (July 28, 2016): 1889–901. http://dx.doi.org/10.1177/1369433216649388.

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Regular reinforced concrete beam–column knee joints are typically framed by beams and columns with similar heights. However, complexities in modern architecture layouts may result in irregular geometries for the knee joint. The irregular geometry refers to significant differences in the height for the beam and the column framing into the joint. For example, the height of the beam is considerably larger than that of the column, and vice versa. Seismic performance and behavior for the regular knee joint have been well examined through previous experimental research. However, the knee joint with irregular geometry (termed here as irregular knee joint) may have different seismic behaviors compared to the regular knee joint because the irregular geometry can produce different demands, stiffness, strength, and reinforcing bond conditions. Therefore, this article evaluates seismic behavior of the irregular knee joint including failure mode, strength and stiffness degradation, deformation capacity, bond-slip of reinforcement, and energy dissipation capacity through four large-scale static cyclic tests. The test results show that in general the irregular knee joint designed to the current code has low seismic capacity due to poor bond conditions of the reinforcement inside the joint.

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Rezavandi, Arash, and Chung C. Fu. "Response of irregular lightly reinforced concrete frame structures in low seismic zones." Advances in Structural Engineering 20, no. 4 (June 29, 2016): 519–33. http://dx.doi.org/10.1177/1369433216655921.

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This article evaluates the performance of lightly reinforced concrete frames in low seismic zones. The frames under evaluation contain vertical and/or plane irregularities and are designed for gravity loads only. Nonlinear time history analysis using scaled ground motions and pushover procedure as a supplemental method is performed in this study. With the adoption of plastic hinge method, damage levels are addressed according to FEMA 356 definitions. The pivot model is considered for hysteresis behavior. The damage stage and number of formed hinges are classified for the beams and columns. A comparison between models demonstrates while the first story height may suffer minor to moderate damage levels even under low seismic intensity, the severity of damage to the asymmetric plan models can be noticeable. The pushover method results are close to that of time history analysis only for the vertical irregular frames without plane irregularity.

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Alaaraji, Riyadh M. M., and Sofyan Y. A. Kashmola. "Evaluation of Damage Index for RC Frames with Irregular Geometrical Shape Subjected to Blast Loads." Tikrit Journal of Engineering Sciences 27, no. 2 (March 15, 2020): 54–64. http://dx.doi.org/10.25130/tjes.27.2.07.

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The present research focuses on studying the effect of architectural shape of reinforced concrete frames resulting from irregularity of geometrical shape of building frame. The reinforced concrete Frame, consisting of eight storey and three bays, was designed by the American Code ACI-14. SAP2000 (V.20) software was used for the purposes of design, analysis, of the structural response for behavior elasto-plastic under the effect of blast loading, through a number of variables, including the maximum displacement and plastic deformations at the tip of structure, number and status of plastic hinges formed, and damage index. The interaction diagram between axial force and bending moment was adopted as a yield surface to undergo the transition from elastic to plastic behavior for the columns, while the design yield moment was defined as a yield criterion for beams. The accumulated plasticity (Plastic hinge) at the ends of structural element was used to simulate the elasto-plastic behavior . Irregularity and unsymmetrical form of frame structure have a significant effect on increasing the deformations and plastic displacements in the elements more than 40% and increasing the damage index in structure more than 18%, that is calculated on the basis of dissipated energy by plastic deformations. The distance between centers of Mass (C.M.) and Stiffness (C.S.) significantly affects the response of structure, where the plastic deformations of structural elements are in the least damage zone in case of convergence between two centers, compared to other cases of heterogeneity irregularity of geometrical shape of structure that results in diverging of these centers.

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Bai, Xiao Hong, Lei Xie, and Tao Wang. "Experimental Study and Finite Element Analysis on Dynamic Property of the Reinforced Concrete Frame-Bent Structure." Advanced Materials Research 243-249 (May 2011): 5223–26. http://dx.doi.org/10.4028/www.scientific.net/amr.243-249.5223.

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Based on the R.C. frame-bent structure in a large-scale thermal power plant’s main building, a 1/7 scale model has been tested by man-excitaiton to determine its’ dynamic properties. The former three frequencies and vibration modes of the model are obtained, and the dynamic property of the original structure is studied based on model similarity theory. At last, modal analysis of plane model and spatial model of prototype are discussed by using ANSYS FEA software, and the spatial dynamic preperty of the irregular structure is analyzed.

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Abd Rahim, Siti Marissa, Mohd Zulham Affandi Mohd Zahid, Wan Mohd Sabki Wan Omar, Mohd Asri bin Ab Rahim, and Ade Faisal. "Assessment of Reinforced Concrete Building with Soil Structure Interaction Effect under Vertical Earthquake." Materials Science Forum 857 (May 2016): 331–36. http://dx.doi.org/10.4028/www.scientific.net/msf.857.331.

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In past investigation, most of studies on seismic analysis for soil structure interaction effect are small and generally design building were considered to be fixed at their support. In actual condition, flexibility of the bases soil medium were generate some deformation in foundation element and will be shows detrimental effects on the system behavior. This can make a beneficial result on the overall structure response if flexible bases were considered during seismic analysis. The present study attempts to compare the behavior of reinforced concrete medium rise building with soil structure interaction effect and fixed bases under vertical earthquake. The eight-storey irregular 2D frame models were subjected to ground motion from 4 stations with peak ground acceleration ratios vertical to horizontal (V/H) between ranges 0.95 to 1.16. During simulation of simplified model, Impedance Function has been applied to calculate the stiffness of such spring. The structural response quantities were considered displacement histories and axial load variation. The result shows that the consideration of soil structure interaction effect may increase such response behavior.

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Furtado, André, Hugo Rodrigues, and António Arêde. "Effect of the Openings on the Seismic Response of an Infilled Reinforced Concrete Structure." Buildings 12, no. 11 (November 18, 2022): 2020. http://dx.doi.org/10.3390/buildings12112020.

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The seismic behavior of the infill masonry infill walls has a significant impact on the global response of reinforced concrete frame structures. One factor influencing its behavior is the existence of openings in the walls, such as doors and windows, which are crucial for the infill seismic performance. Although the numerical simulation of the seismic behavior of RC buildings with infill walls has evolved significantly in recent years in terms of micro- and macro-modelling, most of the existing studies are only related to infill walls without openings. Based on this motivation, four main objectives were defined for this research work: (i) present a simplified modeling approach and its calibration to simulate the seismic behavior of infill walls with central openings such as windows; (ii) evaluate the impact of the openings on the global seismic response of an RC building; (iii) study the impact of the irregular distribution of the infill walls (vertical and in-plane) on the global seismic response of an RC building; and (iv) study the impact of the central openings ratio (i.e., relative percentage between opening and infill wall area) on the global seismic response of an RC building structure. A four-story infilled RC building was used as a case study to perform parametric analyses investigating the impact of the masonry infill walls’ irregular distribution (vertical and in-plan) and their openings ratio. The results are discussed in terms of natural frequencies and vibration modes, initial lateral stiffness, and maximum lateral resistance. This study found that the openings caused a reduction in the natural frequencies of about 20% compared with the full infill (without openings). The openings did not modify the vibration modes. In addition, the openings reduced the initial stiffness by about 20% compared with the model without openings. The maximum strength increased about 50% with the infill walls, but this was reduced by the openings by 20%.

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Aboutorabian, Elham, and Morteza Raissi Dehkordi. "Numerical study of seismic response of irregular multi-frame reinforced concrete bridges." Proceedings of the Institution of Civil Engineers - Structures and Buildings 173, no. 11 (November 2020): 783–98. http://dx.doi.org/10.1680/jstbu.18.00222.

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Ventura, Carlos E., and Norman D. Schuster. "Structural dynamic properties of a reinforced concrete high-rise building during construction." Canadian Journal of Civil Engineering 23, no. 4 (August 1, 1996): 950–72. http://dx.doi.org/10.1139/l96-901.

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This paper presents the results of a study on the variability of the dynamic properties of an irregular high-rise building during its construction. Most of the knowledge about structural dynamics of high-rise reinforced concrete buildings is based on uniform structures. Hence, there is concern about extrapolating this knowledge to the behaviour of nonuniform building that emerge from current architectural trends. A clear example of these trends is the building selected for this study. This 30-storey reinforced concrete building is representative of the type of current construction in Vancouver, British Columbia. The lateral force resisting system in this structure is uniform in plan and elevation, while the distribution of storey mass is asymmetrical owing to its geometry as well as a major setback at one corner. Dynamic characteristics were determined by analyzing ambient vibrations of the structure. The objectives of this study included determining natural frequencies and corresponding mode shapes, determining the effect of architectural components, assessing base motion, and assessing the manner of the core's deformation. In addition, a three-dimensional dynamic analysis was performed to assess the accuracy of modeling techniques. Finally, base shears and overturning moments during different stages of construction were assessed in accordance with current building codes. Key words: structural dynamics, ambient vibration measurements, earthquakes, building construction, mode shapes and frequencies.

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Babu, Suni Susan, and Manish Jose. "Seismic assessment of irregular reinforced concrete frame structures using triple friction pendulum bearing." IOP Conference Series: Materials Science and Engineering 396 (August 29, 2018): 012007. http://dx.doi.org/10.1088/1757-899x/396/1/012007.

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Vijayan, Anand, and Raiza Susan George. "Mid Rise Building having Oblique Column with and without Damper: A Review." International Journal for Research in Applied Science and Engineering Technology 11, no. 4 (April 30, 2023): 2533–35. http://dx.doi.org/10.22214/ijraset.2023.50706.

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Abstract: As the modern culture of living develops, conventional regular shaped buildings are getting outdated with new designs of complex irregular shaped structures. That irregularity became the new mode of measuring the modernity and development of that society. The complex shapes demands the need of designing irregular shaped structural elements too. One of that structural elements is oblique columns. The Oblique columns are inclined or slanted or rotated at an angle to reference line. Oblique columns are stiffer and the initial stiffness of the reinforced concrete frames largely depends upon the stiffness of oblique column. For oblique column of below 90°, there will be a decrease in plan dimensions and for above 90°, there will be increase in plan dimensions as we reach upper floors. It affects the lateral stiffness of these buildings. Compared to standard columns, oblique columns of below 90° have lesser storey shear values and oblique columns of above 90° have higher storey shear values. Stiffness of reinforced concrete frames with oblique columns depends on the distribution of oblique columns. The lateral loads are resisted by structure with oblique columns of below 90°, the highest storey displacement is less in oblique structure as compared to the easy RC Frame building. The building is analyzed with and without viscous dampers. In this review paper, attempts are made to review the previous studies related to buildings with oblique columns and dampers. It aims at consolidating the outcomes of several attempted kinds of research to improve the overall stability of the buildings with oblique column.

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Xu, Jin, Pin Li, and Dong Qiang Xu. "The Time History Analysis of the Frame Structure Component Considering Torsion Component of Earthquake." Applied Mechanics and Materials 90-93 (September 2011): 1526–30. http://dx.doi.org/10.4028/www.scientific.net/amm.90-93.1526.

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In this paper, both 一-shaped and L-shaped reinforced concrete frame structures are established in ANSYS, and then，the one-way seismic waves, bi-directional seismic waves and two-way plus torsion seismic wave are respectively input to the both of frame structural model, and carried out the torsion angle displacement analysis. Simulations show that: in both frame structures, the torsion angle of column under multidimensional seismic waves is around 20 % greater than it under the one-way seismic wave and corner column is particularly obvious, so we should considered multi-dimensional effects of the earthquake and pay attention to strengthening corner column in seismic design. And the torsion angle of asymmetric structure and increasing rate of it are about 2% larger than the corresponding symmetry structure. So we should pay attention to the torsion effect of irregular structure.

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31

Wang, Yu, Zongying Shu, Tianrong Huang, Yongyu Li, and Shihua Wang. "Underground Structure Inspection in Geological Groundwater Environment Base on Geologic Radar Technology." E3S Web of Conferences 236 (2021): 01046. http://dx.doi.org/10.1051/e3sconf/202123601046.

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How to accurately detect the anti-slide pile and the surrounding rock hole is the key to the correct application of the concrete quality treatment method, at the same time, it can ensure the control effect to a certain extent, and make the treatment project more economical and effective. The presence of water in the reinforced concrete layer, coupled with the void shape, and the irregular nature of the water in the hole, may be filled with air, mud, soil and other media factors, so there is considerable complexity. The number of abnormal bodies in the contrast enhancement diagram increases significantly, which is helpful for us to observe the loose area of anti-slide pile. We can find the pixel value corresponding to the feature by detecting the abnormal data of the pile one by one.

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32

Vadeo, S. D., and M. V. Waghmare. "Non-linear Dynamic Analysis of RC Structures Under Earthquake Sequences." Proceedings of the 12th Structural Engineering Convention, SEC 2022: Themes 1-2 1, no. 1 (December 19, 2022): 373–78. http://dx.doi.org/10.38208/acp.v1.524.

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Earthquakes in active seismic regions usually occur in a series of medium to strong intensity ground motions at small intervals of times. A large intensity mainshock (MS) is often followed by a series of aftershocks (AS) or even preceded by smaller foreshocks. This sequence type of mainshock-aftershock (MS-AS) ground motions with varying intensity pose major seismic hazard as there is limited scope of repair and retrofitting between seismic events. Due to continuous and repeated seismic ground motions over a brief period of time, the damages in the structure gets accumulated and structure collapse. This study navigates the behaviour of reinforced concrete structures under such seismic sequences. For this purpose, the nonlinear response of three 12 storey reinforced concrete buildings (regular plan, mass irregularity and diaphragm irregularity) is evaluated. The buildings are subjected to five real seismic sequences from previous earthquakes. Nonlinear dynamic analyses are carried out to study the response of buildings under MS and MS-AS sequences considering: a) material and geometric non linearities and b) irregularities. A single highest aftershock is considered in the present study. The results in this study indicates that MS-AS seismic sequence considering both material and geometric nonlinearities has significant effect on the response of structure. It also showed that seismic sequences significantly alter the response of irregular structure.

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Aldeka, Ayad B., Nikolaos I. Tziavos, Michaela Gkantou, Samir Dirar, and Andrew H. C. Chan. "Seismic design of non-structural components mounted on irregular reinforced concrete buildings." Journal of Building Engineering 46 (April 2022): 103783. http://dx.doi.org/10.1016/j.jobe.2021.103783.

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34

Akbari, Reza. "Seismic fragility analysis of reinforced concrete continuous span bridges with irregular configuration." Structure and Infrastructure Engineering 8, no. 9 (September 2012): 873–89. http://dx.doi.org/10.1080/15732471003653017.

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35

Kheira Camellia, Nehar. "Spectral modal modeling by FEM of reinforced concrete framed buildings irregular in elevation." International Review of Applied Sciences and Engineering 12, no. 2 (May 29, 2021): 183–93. http://dx.doi.org/10.1556/1848.2021.00229.

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AbstractThe irregular buildings constitute a large part of urban infrastructure and they are currently adopted in many structures for architectural or esthetic reasons. In contrast, the behavior of these buildings during an earthquake generates a detrimental effect on their regularity in elevation which leads to the total collapse of these structures.The objective of this work is essentially to model reinforced concrete framed buildings irregular in elevation subjected to seismic loads by the Finite Element Method (FEM). This modeling aims to evaluate several parameters: displacements, inter-storey drifts and rigidities, using two dynamic calculation methods; one modal and the other spectral modal. The latter is widely used by engineers.For this purpose, a detailed study of the frames which have several setbacks in elevation is carried out to validate the correct functioning of our FEM calculation code in both cases of modal and modal spectral analyses. The performance, accuracy and robustness of the FEM calculation code produced in this study is shown by the good correlation of the obtained results for the treated frames with those obtained using the ETABS software.

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LEITÃO, F. F., G. H. SIQUEIRA, L. C. M. VIEIRA JR., and S. J. C. ALMEIDA. "Analysis of the global second-order effects on irregular reinforced concrete structures using the natural period of vibration." Revista IBRACON de Estruturas e Materiais 12, no. 2 (April 2019): 408–28. http://dx.doi.org/10.1590/s1983-41952019000200012.

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Abstract The χT parameter, a simplified method recently presented, allows to estimate the global second-order effects on reinforced concrete frames using the natural period of vibration. This parameter was developed based on the fact that both natural period of vibration and global second-order effects depend essentially on the stiffness and mass matrices of the structure, being thus related. In this paper, numerical analyses are conducted on nine models with different patterns of irregularity in terms of geometry in plan and stiffness. The main purpose of these analyses is to evaluate the applicability of the χT parameter in asymmetric structures as well as that can present torsional modes as the fundamental mode of vibration. In addition, different hypotheses are tested in order to verify the influence of the different modes of vibration in the structural sensitivity to global second-order effects. Results of the simplified analyses were compared to the final bending moment values obtained through a nonlinear numerical analysis considering the P-Δ effect. It is observed that the parameter χT is a promising indicator for a simplified estimation of the global second-order effects for concrete frames, especially when higher modes of vibration are taken account in the analysis.

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Zavala, D. J., C. J. Torres, and J. D. Moreno. "Influence of the P-delta Effect and Stiffness Irregularity on the Structural Behavior of Reinforced Concrete Buildings." Journal of Physics: Conference Series 2287, no. 1 (June 1, 2022): 012047. http://dx.doi.org/10.1088/1742-6596/2287/1/012047.

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Abstract In this research, the influence of the stiffness irregularity and the p-delta effect on the structural behavior of a reinforced concrete building is analyzed. The main objective is to determine the impact of the stiffness irregularity and the p-delta effect on the structural behavior in regular and irregular buildings. First, the linear dynamic analysis procedure is performed in order to determine the structural response in terms of drifts, shear force and moments per floor. Subsequently, we proceed with the nonlinear static analysis procedure to obtain the capacity curve of the structure. The post elastic stiffness and the overall ductility of the structure are determined from the capacity curve. Finally, a comparative analysis of the responses from the linear and nonlinear analysis is carried out to determine the percentage variation of the results. When analyzing the structures that consider the stiffness irregularity and the p-delta effect, variations of up to 16.50%, 11.00% and 14.00% have been obtained in drifts, shear force and moments per floor respectively, which are considerable values. When the p-delta effect is considered in structures with the presence of stiffness irregularity, there is a variation in stiffness of up to 59.85%. With this result it is explained that the p-delta effect produces a greater degradation of the overall stiffness of the structure.

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38

Saatcioglu, Murat, Dan Palermo, Ahmed Ghobarah, Denis Mitchell, Rob Simpson, Perry Adebar, Robert Tremblay, Carlos Ventura, and Hanping Hong. "Performance of reinforced concrete buildings during the 27 February 2010 Maule (Chile) earthquake." Canadian Journal of Civil Engineering 40, no. 8 (August 2013): 693–710. http://dx.doi.org/10.1139/cjce-2012-0243.

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The paper presents observed damage in reinforced concrete buildings during the 27 February 2010 Maule earthquake in Chile. Performance of concrete frame and shear wall buildings are discussed with emphasis on seismic deficiencies in design and construction practices. It is shown that the majority of structural damage in multistorey and high-rise buildings can be attributed to poor performance of slender shear walls, without confined boundary elements, suffering from crushing of concrete and buckling of vertical wall reinforcement. Use of irregular buildings, lack of seismic detailing, and the interference of nonstructural elements were commonly observed seismic deficiencies. A comparison is made between Chilean and Canadian design practices with references made to the applicable code clauses. Lessons are drawn from the observed structural performance.

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Ghimire, Krishna, and Hemchandra Chaulagain. "Common irregularities and its effects on reinforced concrete building response." Structural Mechanics of Engineering Constructions and Buildings 17, no. 1 (December 15, 2021): 63–73. http://dx.doi.org/10.22363/1815-5235-2021-17-1-63-73.

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In most of the countries, the irregular building construction is popular for fulfilling both aesthetic and functional requirements. However, the evidence of past earthquakes in Nepal and the globe demonstrated the higher level of seismic vulnerability of the buildings due to irregularities. Considering this fact, the present study highlighted the common irregularities and its effect on reinforced concrete building response. The effect of structural irregularities was studied through numerical analysis. The geometrical, mass and stiffness irregularities were created by removing bays in different floor levels and removing the columns at different sections respectively. In this study, the numerical models were created in finite element program SAP2000. The structural performance was studied using both non-linear static pushover and dynamic time history analysis. The results indicate that the level of irregularities significantly influenced the behavior of structures.

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Rohmer, Ophélie, Maria Paola Santisi d’Avila, Etienne Bertrand, and Julie Regnier. "Rocking Motion Analysis Using Structural Identification Tools." Geotechnics 3, no. 3 (July 4, 2023): 601–23. http://dx.doi.org/10.3390/geotechnics3030033.

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This research investigates the convenience of structural identification tools to detect the rocking motion tendency, using as input the structural response to ambient vibrations. The rocking ratio and rocking spectrum are proposed as original tools to highlight the rocking motion and its frequency content. The proposed procedure allows the detection and quantification of rocking using only building vertical motion records in both cases of ambient vibration and earthquake. First, three-dimensional finite element models of reinforced concrete buildings are adopted to simulate the structural response to white noise vibration. Different low- and high-rise buildings are studied, having framed structure and frame–wall system, regular and irregular structure, shallow foundation and underground floors. The structural response obtained numerically is analyzed using different signal processing tools to obtain the dynamic features of buildings, and the rocking motion tendency is identified by comparison with a reference fixed base condition. Then, the reliability of the proposed methodology to detect rocking motion attitude, using only the structural motion, is verified and quantified using the proposed tools. Finally, the same approach is applied to real structural motion records of a high-rise reinforced concrete building.

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Bhile, Shubham S., and Uttam R. Awari. "Seismic Analysis of Unsymmetrical Buildings Compering with Regular Building." SAMRIDDHI : A Journal of Physical Sciences, Engineering and Technology 14, Spl-2 issu (June 30, 2022): 218–22. http://dx.doi.org/10.18090/samriddhi.v14spli02.3.

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Structural analysis of building is taken into account for finding out the behaviors of a structure when subjected to some external force acting on building. Building structural design for seismic loads is critical for structural safety during large ground movementsBuildings with symmetrical and unsymmetrical plan geometry, strength, and stiffness are also varied. During earthquakes, structures with a symmetric distribution of stiffness and strength in plan experience combined lateral and torsional motions.Previous earthquakes, in which many reinforced concrete structures were badly damaged or collapsed, highlighted the need to assess building seismic performance. Earthquakes can cause irregular distribution of mass, stiffness and strengths i.e., unsymmetrical buildings may cause heavy damage in structural members. Buy referring this paper it is concluded that symmetric buildings perform better than un-symmetric buildings when subjected to earthquake forces.

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Liu, Xuchen, Xiaojun Li, Xiaohui Wang, Ning Wang, and Zaixian Li. "Shaking Table Test of a Transfer-Purge Chamber in Nuclear Island Structure." Materials 15, no. 3 (January 20, 2022): 766. http://dx.doi.org/10.3390/ma15030766.

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The transfer-purge chamber is an operation room for nuclear fuel transport and purging in a nuclear power plant, which has a demand for structural reliability and radiation protection. The transfer-purge chamber has features such as large curvature, heavy concrete, long overhang, and irregular cross-sections, and it is constructed of double steel plates reinforced concrete (SC) structure. This study performed shaking table tests for a 1:4.5 scale model of the transfer-purge chamber. Three sets of ground motions were input in the scale model in the horizontal and vertical directions to study its structural reliability and seismic performance. Acceleration response and strain response of the structure were analyzed to evaluate the dynamic characteristics of the transfer-purge chamber under the ground motion. The results show that the transfer-purge chamber has great stiffness and short periods. The periods slightly increase with the rise of intensity of seismic ground motions. Under the excitation of ground motions, the dynamic response of the transfer-purge chamber is slight. No obvious deformation or damage occurred on the transfer-purge chamber, and cracking in concrete or buckling on steel plate did not appear. The transfer-purge chamber has excellent seismic performance, and it is sufficiently safe and reliable from a structural perspective.

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43

Aldwaik, Mais, and Hojjat Adeli. "Cost optimization of reinforced concrete flat slabs of arbitrary configuration in irregular highrise building structures." Structural and Multidisciplinary Optimization 54, no. 1 (May 27, 2016): 151–64. http://dx.doi.org/10.1007/s00158-016-1483-5.

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Men, Jinjie, and Qingxuan Shi. "ISCS method for the performance-based seismic design of vertically irregular reinforced concrete frame structures." Structural Design of Tall and Special Buildings 22, no. 11 (December 21, 2011): 887–902. http://dx.doi.org/10.1002/tal.759.

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45

Gil-oulbé, Mathieu, Fouad Adnan Noman Abdullah Al-Shaibani, and Abass Saad Lina. "Performance-Based Seismic Design for buildings." Structural Mechanics of Engineering Constructions and Buildings 16, no. 2 (December 15, 2020): 161–66. http://dx.doi.org/10.22363/1815-5235-2020-16-2-161-166.

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Structures are designed using current seismic design codes which are mostly based on Force-Based Design approach. The aim of the work is to implement the Performance-Based Seismic Design (PBSD) approach in concrete buildings. PBSD, which is a new concept in seismic design of structures, is a reliable approach capable of providing more detailed information on the performance levels of both structural and non-structural elements. Methods. In this study Performance-Based Seismic Design has been utilized on reinforced concrete irregular frame. In order to do this pushover analysis was done. Story drift ratios were chosen as deformation limits to define the performance levels for specific earthquake hazard levels. The results of this study show that Performance-Based Seismic Design gives a structure with better seismic load carrying capacity, thereby achieving the objective of performance as well as economy. It is also possible to conclude that PBSD obtained by above procedure satisfies the acceptance criteria for immediate occupancy and life safety limit states for various intensities of earthquakes.

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Landingin, Jaime, Hugo Rodrigues, Humberto Varum, António Arêde, and Aníbal Costa. "Comparative Analysis of RC Irregular Buildings Designed According to Different Seismic Design Codes." Open Construction and Building Technology Journal 7, no. 1 (December 30, 2013): 221–29. http://dx.doi.org/10.2174/1874836801307010221.

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The present paper presents a comparison of seismic provisions of three seismic design codes, the Philippine code, Eurocode 8 and the American code, to the most common ordinary residential frames of standard occupancy. Regular and irregular reinforced concrete frames were analyzed and compared for four storey building types. The response spectrum and the seismic parameters of NSCP 2010 were considered for the horizontal load action with different load combinations. Response spectrum analysis and equivalent lateral force analysis were performed using SAP2000 software package. Five representative columns for each RC frame structure were analyzed. Based on the results of column axial load - bending moment interaction diagrams, EC8 was found to be conservative when compared to NSCP 2010 and 2009 IBC. The conclusion is that for the design and analysis of ordinary RC residential buildings with certain irregularity, EC8 provisions were considered to be safer.

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Mercedes, Luis, Christian Escrig, Ernest Bernat-Masó, and Lluís Gil. "Analytical Approach and Numerical Simulation of Reinforced Concrete Beams Strengthened with Different FRCM Systems." Materials 14, no. 8 (April 8, 2021): 1857. http://dx.doi.org/10.3390/ma14081857.

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Fabric-reinforced cementitious matrices (FRCMs) are a novel composite material for strengthening structures. Fabric contributes to tying cross-sections under tensile stress. The complexity of the interfaces between the fabric and the matrix does not allow having a simple and accurate model that enables practitioners to perform feasible calculations. This work developed an analytical approach and a numerical simulation based on the reduction of FRCMs’ strength capabilities under tensile stress states. The concept of effective strength was estimated for different types of fabrics (basalt, carbon, glass, poly p-phenylene benzobisoxazole (PBO), and steel) from experimental evidence. The proposed models calculate the ultimate bending moment for reinforced concrete (RC) structures strengthened with FRCMs. The numerical models performed simulations that reproduced the moment–deflection curves of the different tested beams. Steel fabric showed the highest contribution to strength (78%), while PBO performed the worst (6%). Basalt and carbon showed irregular contributions.

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Bensalah, Mohamed Draidi, Mahmoud Bensaibi, and Arezou Modaressi. "Assessment of the Torsion Effect in Asymmetric Buildings under Seismic Loading." Applied Mechanics and Materials 256-259 (December 2012): 2222–28. http://dx.doi.org/10.4028/www.scientific.net/amm.256-259.2222.

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According to the recent earthquakes, the asymmetric buildings suffer from severe damages caused by increased torsional response. The new seismic codes try to take into account this effect and during the modeling it is difficult to assess all the parameters that have an influence on the behavior of this kind of structures. In this work, a study on the influence of the effects of torsion on the behavior of structure is done. The proposed structures consist of an irregular 3-storey reinforced concrete frame with infinitely rigid slabs. The uncertainties of input parameters, such as seismic Arias intensity, peak ground acceleration, predominant period and output ones such as, inter-story Drift, and dynamic eccentricity upon the torsion is investigated. Using a finite element code, dynamic linear and non linear time analysis and pushover analysis have been performed, based on 116 seismic records with a magnitude varying between 6.2 and 7.7.

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Hansen, Bryce, and Manik Barman. "New Procedure to Evaluate the Post-Crack Behavior of Fiber-Reinforced Concrete." Transportation Research Record: Journal of the Transportation Research Board 2673, no. 11 (June 16, 2019): 573–82. http://dx.doi.org/10.1177/0361198119848408.

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This study attempted to identify the challenges in testing and characterization of the post-crack behavior of structural fiber-reinforced concrete (FRC) for use in pavements. The benefits and challenges associated with three different FRC testing methods, ASTM C1550, C1399, and C1609 were discussed and compared. Two new parameters, post-crack toughness, and post-crack performance (PCP) index were proposed to characterize the post-crack behavior of FRC. These parameters are a function of the fibers’ contribution and are minimally influenced by the properties of the non-fiber ingredients of concrete such as aggregates, cement, and water. A laboratory study conducted on 10 different types of FRCs validated the applicability of the two proposed new parameters. Transportation agencies can use the PCP index to shortlist effective fibers and post-crack toughness to determine fiber dosage. The study found that fibers with irregular cross-section or geometry and high lateral stiffness provide a high post-crack contribution.

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Kong, Jingchang, Yuhan Su, Zhi Zheng, Xiaomin Wang, and Yukang Zhang. "The Influence of Vertical Arrangement and Masonry Material of Infill Walls on the Seismic Performance of RC Frames." Buildings 12, no. 6 (June 14, 2022): 825. http://dx.doi.org/10.3390/buildings12060825.

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This study presents a finite element (FE) model, the accuracy of which is verified by the comparison between the numerical and test results. The calibrated model is used to investigate the influence of vertical arrangement and masonry material of infill walls on the seismic performance of reinforced concrete (RC) frames through pushover analysis and time–history analysis. The lateral capacity, interstorey drift ratio, and plastic hinge distribution of structures is discussed. It was found that the damage of frames with irregular vertical infill arrangement is more serious than that of bare frames, which should be limited in the seismic design process. Moreover, the disadvantages induced by the elastic modulus of masonry material should be considered in the seismic design and assessment of the frames with vertical irregularly arranged infill.

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Journal articles on the topic 'IRREGULAR REINFORCED CONCRETE STRUCTURE'

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