Relevant bibliographies by topics / RC and masonry

Academic literature on the topic 'RC and masonry'

Author: Grafiati
Published: 1 April 2023

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Journal articles on the topic "RC and masonry"

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Han, Sang Whan, and Chang Seok Lee. "Cyclic behavior of lightly reinforced concrete moment frames with partial- and full-height masonry walls." Earthquake Spectra 36, no. 2 (February 20, 2020): 599–628. http://dx.doi.org/10.1177/8755293019899960.

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Existing lightly reinforced concrete (RC) moment frames are vulnerable to earthquakes. The seismic behavior of these frames could be affected by the presence of masonry infill walls. The objective of this study was to investigate the seismic behavior of gravity-designed RC frames having partial- and full-height masonry infill walls. For this purpose, experimental and numerical studies were conducted. Three one-story and one-bay gravity-designed RC moment frames with and without partial- and full-height masonry infill walls were made and tested under cyclic lateral loads. Numerical models for RC moment frames and masonry walls were proposed based on test data. Nonlinear static and incremental dynamic analyses (IDAs) were conducted for three-story RC moment frames with and without partial- and full-height masonry infill walls using the numerical models. Both experimental and numerical studies demonstrated that the masonry-infilled RC frames had larger lateral strength and stiffness than bare RC frames, whereas their drift capacity was less than that of bare frames. The partial-height masonry-infilled RC model frame had the least collapse strength among the frames.
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Lin, Kun, Yuri Z. Totoev, and Hong Jun Liu. "In-Plane Cyclic Test on Framed Dry-Stack Masonry Panel." Advanced Materials Research 163-167 (December 2010): 3899–903. http://dx.doi.org/10.4028/www.scientific.net/amr.163-167.3899.

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A new masonry system has been developed to improve the seismic behaviour of RC frame with masonry panels. In this system dry-stack masonry panels are built with masonry units capable of sliding in-plane of a panel. These masonry panels have reduced in-plane stiffness but increased frictional energy dissipation capacity compared with the traditional masonry panels. Under seismic or wind loads these panels do not detrimentally interfere with natural RC frame response but rather positively contribute to it mainly by increasing dumping. A cyclic test has been performed to evaluate the behaviour of this masonry system. Test results demonstrate that the new system can improve the seismic behaviour of RC frame structures with masonry panels.
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Filippou, Christiana A., Nicholas C. Kyriakides, and Christis Z. Chrysostomou. "Numerical Modeling of Masonry-infilled RC Frame." Open Construction & Building Technology Journal 13, no. 1 (June 30, 2019): 135–48. http://dx.doi.org/10.2174/1874836801913010135.

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Background: The behavior of masonry-infilled Reinforced Concrete (RC) frame structures during an earthquake, has attracted the attention of structural engineers since the 1950s. Experimental and numerical studies have been carried out to investigate the behavior of masonry-infilled RC frame under in-plane loading. Objective: This paper presents a numerical model of the behavior existing masonry-infilled RC frame that was studied experimentally at the University of Patra. The objective of the present study is to identify suitable numerical constitutive models for each component of the structural system in order to create a numerical tool to model the masonry infilled RC frames in-plane behavior by accounting the frame-infill separation. Methods: A 2D masonry-infilled RC frame was developed in DIANA Finite Element Analysis (FEA) software and an eigenvalue and nonlinear structural cyclic analyses were performed. It is a 2:3 scale three-story structure with non-seismic design and detailing, subjected to in-plane cyclic loading through displacement control analysis. Results: There is a good agreement between the numerical model and experimental results through a nonlinear cyclic analysis. It was found that the numerical model has the capability to predict the initial stiffness, the ultimate stiffness, the maximum shear-force capacity, cracking- patterns and the possible failure mode of masonry-infilled RC frame. Conclusion: Therefore, this model is a reliable model of the behavior of masonry-infilled RC frame under cyclic loading including the frame-infill separation (gap opening).
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Beyer, Katrin, and Alessandro Dazio. "Quasi-Static Monotonic and Cyclic Tests on Composite Spandrels." Earthquake Spectra 28, no. 3 (August 2012): 885–906. http://dx.doi.org/10.1193/1.4000058.

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In modern unreinforced masonry (URM) walls, the vertical piers are connected at the story levels by reinforced concrete (RC) ring beams—also known as bond beams—or RC slabs. Particularly, in the outer walls, the spandrel element also includes a masonry spandrel on top of the RC beam or slab (“composite” spandrel). Numerical simulations have shown that spandrels significantly influence the global behavior of the URM building when subjected to seismic loading. Despite their importance, experimental data on the cyclic behavior of composite spandrels were lacking. This paper presents the results of an experimental campaign on five composite spandrels. Each test unit consisted of an RC beam, a masonry spandrel and the adjacent masonry piers required for applying realistic boundary conditions to the spandrel. The investigated parameters included the type of loading, the brick type and the reinforcement content of the RC beam.
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Bose, Supratik, and Durgesh C. Rai. "Lateral Load Behavior of an Open-Ground-Story RC Building with AAC Infills in Upper Stories." Earthquake Spectra 32, no. 3 (August 2016): 1653–74. http://dx.doi.org/10.1193/121413eqs295m.

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Autoclaved aerated concrete (AAC) masonry infills in upper stories can be beneficial for improving the seismic response of open-ground-story (OGS), reinforced concrete (RC)–frame buildings. Two reduced 1:2.5-scale models of single-story, single-bay RC frames with and without AAC infill masonry were tested for resistance properties and hysteretic behavior. Low strength and stiffness of AAC masonry, about half of the conventional brick masonry, led to improved load sharing between the infill and the frame, which helped an early development of frame yield mechanism for enhanced energy dissipation. Test results were used to evaluate the reliability of using existing strength and stiffness relations of conventional masonry infilled RC frames for AAC infilled frames. Analytical models were developed to predict the observed hysteretic behavior of tested specimens. Nonlinear analyses of a five-story, four-bay OGS-RC frame were performed for conventional brick masonry infills and relatively softer and weaker AAC infills in upper stories. The results indicated that the undesirable effect of weak/soft ground story mechanism of OGS-RC frames can be reduced to an acceptable level by using AAC infills in upper stories.
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Pudjisuryadi, Pamuda, V. S. Prayogo, S. I. Oetomo, and Benjamin Lumantarna. "Seismic Performance of a Three-Story Reinforced Concrete Building with Masonry Infill Walls and Friction Base Support." Civil Engineering Dimension 23, no. 1 (April 20, 2021): 35–43. http://dx.doi.org/10.9744/ced.23.1.35-43.

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The stiffness of masonry infill walls is commonly neglected in design practice of Reinforced Concrete (RC) structures. In fact, the stiffness of masonry infill wall may significantly influence seismic performance and dynamic behavior of RC buildings. In this research, influence of masonry infill walls to the structural performance of a three-story RC frame is investigated. In addition, possible application of friction-based support is also studied. Full 3D non-linear time history analysis is conducted to observe behavior of the structure under two-directional ground motion. In the analysis, any failed elements are removed subsequently from the model to avoid numerical analysis problem. The result shows that the placement of masonry infill walls can significantly influence the structural behavior of RC structure. Inappropriate placement of masonry wall may lead the building undergo soft-story mechanism. It is also found that the use of friction-based support can effectively improve the seismic performance of the building.
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Yang, Youfa, Feihu Li, and Feiyu Wang. "Analysis of the Seismic Performance of a Masonry Structure with an RC Frame on the First Story with a Concrete-Filled Steel Tubular Damper." Applied Sciences 13, no. 4 (February 13, 2023): 2408. http://dx.doi.org/10.3390/app13042408.

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The concrete shear walls of masonry structures with an RC frame on the first story are low-rise shear walls with a height–width ratio of less than 1. The strength, stiffness, and ductility of these low-rise shear walls are not matched, resulting in poor seismic performance. Based on the idea of the passive control theory and multi-seismic defensive lines, the scheme of a masonry structure with an RC frame on the first story with a concrete-filled steel tubular (CFST) damper is proposed in this paper. To explore the seismic mitigation effect of a CFST damper applied to a masonry structure with an RC frame on the first story, the seismic performance under low-reversed cyclic loading of the frame with the CFST damper is first compared with that of the energy-dissipated low-rise concrete shear wall proposed by previous researchers and the ordinary low-rise concrete shear wall. Furthermore, the response of the masonry structure model with an RC frame on the first story with a CFST damper and two other comparative structural models under earthquake action are discussed. The results show that a masonry structure with an RC frame on the first story with a CFST damper has a fuller hysteretic loop, lighter pinching, better energy dissipation ability, and better seismic performance. Compared with the other two structures, the energy dissipation capacity of the masonry structure with an RC frame on the first story with a CFST damper is significantly improved, by 1.25~1.5 times. The amplification effect of the deformation angle allows the CFST damper to play a significant role in energy dissipation, whereas the main structure still undergoes a small deformation. The CFST damper can dissipate more seismic energy to protect the main structure from damage and improve the seismic performance of masonry structures with an RC frame on the first story.
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Zhang, Yong Qun, and Tao Wang. "Numerical Simulation of Masonry Walls Retrofitted by Prefabricated Reinforced Concrete Panels." Applied Mechanics and Materials 351-352 (August 2013): 1514–18. http://dx.doi.org/10.4028/www.scientific.net/amm.351-352.1514.

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Assembly technology using prefabricated reinforced concrete (RC) members can effectively improve the seismic performance of existing masonry buildings. In this study, an existing masonry wall is enhanced by two pieces of prefabricated RC panels bonded on both surfaces of the wall. In order to guarantee the co-action between RC panels and the masonry wall, three techniques are employed, specifically, RC dowelling keys, grouting agent, and post-cast concrete bands. To investigate the interaction and force transmission between the two components, this study builds sophisticated finite element models and conducts nonlinear analyses to simulate the quasi-static cyclic tests. It is demonstrated that the proposed retrofitting technology effectively improves the seismic performance of existing masonry walls. The strength of existing walls increases 3-4 times and the stiffness increases 2-3 times, so that the requirement of current seismic design code is satisfied.
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Mucedero, Gianrocco, Daniele Perrone, Emanuele Brunesi, and Ricardo Monteiro. "Numerical Modelling and Validation of the Response of Masonry Infilled RC Frames Using Experimental Testing Results." Buildings 10, no. 10 (October 13, 2020): 182. http://dx.doi.org/10.3390/buildings10100182.

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Reinforced concrete (RC) frame buildings with masonry infills represent one of the most common structural typologies worldwide. Although, in the past, masonry infills were frequently considered as non-structural elements and their interaction with the structure was neglected, earthquakes occurring over the last decades have demonstrated the important role of these elements in the seismic response of all RC-infilled building typologies. In this regard, the selection of the most suitable numerical modelling approaches to reproduce the hysteretic response of the masonry infills—and their interaction with the RC frames—is still an open issue. To deal with this issue, in this study, a macro-classification based on different available databases of experimental tests on infilled RC frames, is firstly proposed to understand the variability in the infill properties and the corresponding numerical modelling uncertainties. Five masonry infill types are selected as representative for the typical existing configurations in Italy and other Mediterranean countries. Three of those masonry infill types are then selected to carry out a more detailed analysis, namely their numerical modelling validation using experimental testing results, considering and comparing the main formulations available in the literature for the definition of the hysteretic behaviour of infills. From such a comparison, the model that minimizes the prediction error, according to specific features of the selected masonry infill, is identified for each masonry infill type.
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Liu, Chunhui, Bo Liu, Xiaomin Wang, Jingchang Kong, and Yuan Gao. "Seismic Performance Target and Fragility of Masonry Infilled RC Frames under In-Plane Loading." Buildings 12, no. 8 (August 6, 2022): 1175. http://dx.doi.org/10.3390/buildings12081175.

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Masonry infilled RC frames are one of the most common structural forms, the damage of which, in earthquake events, usually cause serious losses. The determination of the seismic performance target is the key foundation of performance-based seismic evaluation and design for masonry infilled RC frames. In this paper, an extensive database of experimental tests on infilled RC frames loaded in an in-plane direction is collated. According to the crack propagation and elastic-plastic characteristics of infilled RC frames, the damage process is divided into four stages, and then the criteria of the damage states (DS) are proposed. In addition, the seismic performance targets expressed as inter-story drift ratio (IDR) for the four stages are suggested, which would support the performance-based in-plane seismic analysis of infilled RC frames. Finally, the proposed in-plane seismic performance target is utilized to analyze the fragility of two masonry infilled RC frame structures.
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Dissertations / Theses on the topic "RC and masonry"

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Wang, Chuanlin. "Retrofitting of infilled RC frames using collar jointed masonry." Thesis, University of Leeds, 2017. http://etheses.whiterose.ac.uk/15961/.

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Masonry is a composite material made of masonry units bonded together with mortar. A large number of historical buildings constructed using masonry can be found all over the world. Little or no seismic loading was considered when they were built. Therefore, masonry structures often need to be retrofitted or strengthened. This research proposed a new strengthening approach using a collar-jointed technique. Namely, the approach is implemented by building another masonry wall parallel to the existing single-leaf wall and bonding the two together using a mortar collar joint. Furthermore, collar-jointed masonry wall construction is also a popular construction system in reality. This thesis considers two different types of collar wall strengthening applications: pre- and post-damaged walls. The results found out that the pre-damaged strengthening could improve the lateral resistance by about 50% while the post-damaged retrofitting can only restore the initial strength. A simplified micro-scale finite element model for fracture in masonry walls was developed. The mortar joints and the brick-mortar interfaces are taken to have zero-thickness. The bricks were modelled as elastic elements while the brick-mortar interfaces were represented using a Mohr-Coulomb failure surface with a tension cut-off and a linear compression cap. One feature of the research was to identify the material parameters for the constitutive model. The material parameters were tuned by minimizing the difference between the experimental and numerical results of a single leaf wall panel. The model was then validated by assigning the parameters to the single-leaf masonry wall as well as to the double-leaf wall to predict its mechanical behaviour. Good agreement with experimental results was found. Furthermore, masonry is also widely used in the form of infill panels within RC frames. Therefore, the collar-jointed technique has also been extended and applied to the infilled RC frame. The numerical results showed that the collar-jointed technique could provide some benefits to the composite structure.
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Ouyang, Yi, and 欧阳禕. "Theoretical study of hybrid masonry : RC structure behaviour under lateral earthquake loading." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hdl.handle.net/10722/196090.

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A confined masonry (CM) wall consists of a masonry wall panel surrounded by reinforced concrete (RC) members on its perimeters. Low-rise CM structures are widely used in earthquake-risked (EQ-risked) rural or suburban areas all over the world. Most of these structures fail in shear pattern under lateral EQ loads, and some of them collapse under a severe or even a moderate EQ due to inappropriate design. On the other hand, buildings constructed of RC frames have much better performance in resisting EQs, since their RC members have larger dimensions and heavier reinforcing ratios than those in CM structures. Nonetheless, RC-frame buildings are normally too expensive for most inhabitants in less developed regions. In this study, as an improvement to the conventional CM buildings for EQ resistance and for the sake of post-EQ restoration, a hybrid masonry – RC (HMR) structure, whose working mechanism is different from that of a conventional CM structure, is proposed. The RC members (i.e. “tie beams” and “tie columns”), which function only as confinement in a CM building, will resist most of gravity load and part of lateral EQ load in an HMR structure, while the wall panels will take most of lateral EQ load and part of gravity load. This is achievable by slightly increasing the sizes and reinforcing ratios of RC members in HMR structures. Such buildings will not collapse in the absence of masonry wall panels because the gravity load bearing system is still intact. On the other hand, as the wall panels in the proposed HMR structure will absorb most of the energy induced by lateral EQ load, severe damages will be controlled within the wall panel region, so that only the wall panels need to be replaced instead of rebuilding the whole structure after the EQ event. To investigate the mechanical behaviours of masonry assemblages to be used in HMR structures, a series of experimental tests were conducted. Having established the relevant material properties for HMR structures, finite element (FE) simulation was performed to verify its work mechanism. Prior to applying the FE simulation to HMR structures, the FE technique was first applied to simulate the behaviours of two concrete-brick masonry panels under diagonal compression loading and a CM wall under cyclic lateral loading. The results show a good correlation between the experimental results and the simulated ones. This has validated the feasibility of using the FE software to study the proposed HMR structure. The theoretical simulation results show that in a properly designed HMR wall, depending on the masonry reinforcing details and the boundary conditions of simulated load cases, about 70% of the gravity load imposed on the RC beam will be transferred to the RC columns and more than 80% of the seismic energy (in terms of strain energy) will be absorbed by the masonry panel. Therefore, it is obvious that the proposed HMR structure is very feasible to replace the conventional CM structure in resisting EQ attacks with no risk of collapse.
published_or_final_version
Civil Engineering
Master
Master of Philosophy
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Loots, Jurie. "Computational assessment of seismic resistance of RC framed buildings with masonry infill." Thesis, Stellenbosch : Stellenbosch University, 2005. http://hdl.handle.net/10019.1/50299.

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Thesis (MScIng)--Stellenbosch University, 2005.
Some digitised pages may appear illegible due to the condition of the original hard copy.
ENGLISH ABSTRACT: Reinforced concrete (RC) frames with unreinforced masonry infill form the structural system of many buildings and this is also true for South Africa. It is common practice to consider the masonry infill as a non-structural component and therefore it does not contribute to the performance of the Re frame buildings under lateral loading such as earthquake loading. This is done by leaving a sufficient gap between the Re frame and the infill. This ensures that there is no contact between the frame and the infill during an earthquake event. However, it has been suggested that masonry infill can play a significant role in the performance of a Re frame building under lateral loading. The first part of the study focuses on the South African situation. The relevance of shear walls in these Re frame buildings as well as the size of the gap (between frame and infill) left in practice, are investigated. This is done by finite element analysis. The second part of the study focuses on the effects that the infill can have on the global performance of the structure when there is full contact between the Re frames and infill. The effect of openings in the infill to the response of the frame is also investigated. Finite element models of single span Re frames with infill is built and analyzed in order to investigate possible damage to the infill, frame infill interaction and to obtain the non linear stiffness of the frame with infill as a whole. This obtained non linear stiffness can be modelled in Diana as a non linear spring that will be used in the development of a simplified analysis method. The simplified method developed consists of a frame and two such non linear springs, placed diagonally, and which have the same force versus displacement behaviour as the original frame with infill. These single span frames can be added together to model a whole frame. In a first step to generalise the simplified method, various geometries of infills are considered, varying span and height, as well as opening percentage, representing windows and doors of varying total area and positioning. However, in this study a single masonry type, namely solid baked clay bricks set in a general mortar, is considered. To generalise the approach further, other masonry types can be considered in the same way. The use of these springs in a simplified model saves computational time and this means that larger structures can be modelled in Diana to investigate response of'Rf' frame buildings with infill. The work reported in this thesis considers only in-plane action. Out-of-plane-action of the masonry infill has been reported in the literature to be considerable, under the condition that it is sufficiently tied to the frame to prevent mere toppling over, causing life risking hazards in earthquake events. This matter should be studied in continuation of the current research to generalise the simple approach to three dimensions.
AFRIKAANSE OPSOMMING: Gewapende betonrame (GBR-e) met ongewapende messelwerk invulpanele (invul) vorm die strukturele ruggraat van vele geboue en dit geld ook vir geboue in Suid-Afrika. Dit is algemene praktyk om die invulpaneel in sulke geboue as 'n nie-strukturele komponent te beskou. Daarvolgens dra dit nie by tot die gedrag van 'n GBR gebou onderhewig aan 'n aarbewing nie. Dit word bereik deur 'n groot genoeg gaping tussen die betonraam en die invul te los. Die gevolg is dat daar geen kontak tussen die betonraam en die invul plaasvind indien daar 'n aardbewing sou voorkom nie. Dit is egter voorgestel dat invul 'n noemenswaardige rol kan speel in die gedrag van 'n GBR gebou onderwerp aan 'n horisontale las. Die eerste deel van die studie fokus op die Suid-Afrikaanse situasie. Die relavansie van skuifmure in GBR geboue asook die grootte van die gaping (tussen die raam en invul) wat in die praktyk gebruik word, word ondersoek. Dit word gedoen met behulp van eindige element analises. Die tweede deel van die studie fokus op die effek wat invul kan hê op die globale gedrag van 'n struktuur wanneer daar volle kontak tussen die GBR en die invul is. Die effek wat die teenwoordigheid van openinge in die invul kan hê op die gedrag van 'n GBR is ook ondersoek. Eindige element modelle van enkelspan GBR met invul is gemodelleer en geanaliseer om die moontlike skade aan die invul, die interaksie tussen die GBR en die invul asook die nie-lineêre styfheid van die raam en invul as 'n geheel, te ondersoek. Hierdie nielineêre styfheid kan in Diana as 'n nie-lineêre veer gemodelleer word en word gebruik in die ontwikkeling van 'n vereenvoudigde metode. Hierdie vereenvoudigde metode wat ontwikkel is, bestaan uit 'n raam en twee sulke nielineêre vere (diagonaal geplaas). Die raam met vere het dieselfde krag teenoor verplasingsgedrag as die van die oorspronklike raam met invul wat dit voorstel. Hierdie rame kan saamgevoeg word om 'n raam uit 'n gebou as 'n geheel te modelleer. Verskeie invul geometrieë word gebruik in die analises in 'n eerste stap om die vereenvoudigde metode te veralgemeen. Die span en hoogte asook opening persentasie van die invul word gevariëer om vensters en deure van veskeie grootte en posisie voor te stel. In die studie, 'n enkel messelwerk tipe, naamlik solied klei bakstene geset in algemene mortar, word gebruik. Ander messelwerk tipes kan gebruik word om die metode verder te veralgemeen. Die gebruik van die vere in die vereenvoudigde metode spaar berekenings tyd en dit beteken dat groter strukture in Diana gemodelleer kan word om die gedrag van GBR geboue met invul te ondersoek. Die werk gedoen in die tesis neem slegs in-vlak aksie in ag. Literatuurstudie dui daarop dat goeie uit-vlak-aksie van messelwerk invul bestaan, mits dit goed geanker is aan die raam om te verseker dat dit nie kan omval en 'n gevaar vir lewens in 'n aardbewing inhou nie. Dit behoort verder bestudeer te vord in die vervolging van die huidige ondersoek om die vereenvoudige metode na drie dimensies te veralgemeen.
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Stefani, Francesca <1987&gt. "Seismic retrofit of existing RC and masonry buildings using external aluminium alloy exoskeleton." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amsdottorato.unibo.it/9875/1/Stefani_Francesca_tesi.pdf.

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This thesis is the result of the industrial PhD carried out in collaboration with Aliva S.r.l. company that develops customized solutions for ventilated facades. The ventilated façade is a multi-layer protective system for the building envelope where the light bearing structure is usually made of aluminium alloy for its property of lightness, durability, corrosion resistance, workability thanks to the extrusion process and eco-sustainability. The scope of this thesis is to investigate the use of aluminium alloys in application fields different from that of the ventilated façade. The use of aluminium alloys in structural engineering is a quite recent activity, because this family of materials is relatively new. Nowadays, after the several research carried out in order to characterize the design of aluminium alloys structures and the publication of Eurocode 9 Design of Aluminium Structures, there are many applications of aluminium alloys in structural engineering. However, there is still a lack of information about the ductility of this material and its use in seismic zones. In fact to date there is no seismic regulations for aluminium alloys applications, only recently in the project for the development of the next generation of structural Eurocodes, it was decided to introduce the aluminium alloys among the new emerging materials for anti-seismic structures. This thesis aims to make a contribution to the study of the possible use of aluminium alloys in seismic areas and intends to study if it can be a competitive solution in the seismic retrofit field. This study is part of the European research project Pro-GET-onE in which the Aliva company is involved together with the university of Bologna and other members. This thesis shows the study and the development of the design of an external structural frame, also called exoskeleton, made of aluminium alloys.
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DI, TRAPANI Fabio. "RC Masonry infilled frames: Experimental results and development of predictive techniques for the assessment of seismic response." Doctoral thesis, Università degli Studi di Palermo, 2014. http://hdl.handle.net/10447/91783.

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La presenza di tamponamenti in muratura all’interno delle maglie di strutture intelaiate induce, in presenza di azioni laterali, una sostanziale modificazione della risposta globale rispetto a quella dei telai nudi in termini di rigidezza, resistenza e capacità di spostamento. La tesi presenta i risultati di una campagna sperimentale su telai tamponati con diverse tipologie di muratura soggetti a prove di carico cicliche. Successivamente viene proposto un criterio per la modellazione semplificata del comportamento ciclico attraverso un macromodello a puntone diagonale equivalente. Una ulteriore indagine numerica è eseguita per valutare l'entità degli effetti locali dovuti all'interazione fra telaio a tamponamento proponendo un criterio per la loro inclusone nella modellazione a puntone concentrico. Infine viene eseguita una calibrazione del puntone diagonale attraverso un modello a fibre. Tale modellazione è utilizzata per studiare il comportamento nel piano e fuori piano dei pannelli in presenza di azioni sismiche provenienti da qualsiasi direzione.
The presence of infill masonry in RC framed structures substantially modifies of the overall response in presence of seismic actions with respect of bare frames in terms of stiffness, strength and displacement capacity . The thesis presents the results of an experimental campaign on infilled frames with different kinds of masonry subjected to cyclic loading tests. Subsequently, a criterion for the simplified modeling of the cyclic hysteretic behavior through a macromodel equivalent diagonal strut is proposed. A further numerical investigation is carried out to assess the influence of local effects due to the interaction between infill a frame and a criterion for their inclusion when concentric strut models are used is developed. Finally calibration of the equivalent strut by means of a fiber model is performed. This approach is also applied to study the in plane-out of plane behavior of masonry infill panels when in the presence of seismic actions acting in any direction .
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Kirch, Nienkotter Rocha Bruna. "Intrinsic variations in geometric properties of nonlinear equivalent strut models for infill-RC frames." Thesis, Edith Cowan University, Research Online, Perth, Western Australia, 2019. https://ro.ecu.edu.au/theses/2187.

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Reinforced concrete frames infilled with unreinforced masonry are commonly used in structures worldwide. The interaction between the frame and the infill panel is usually ignored in engineering practice, and the masonry infill is not considered as a structural element. However, observations made after the occurrence of strong earthquakes have shown that the bare frame and infill-frame behave differently when subjected to in-plane lateral loads. Extensive research has been conducted on the behaviour of infill-frames when laterally loaded. This research focuses on the analysis of infill-frames using the equivalent strut modelling method, whereby an infill-frame is simplified, and the infill panel is replaced by one or more compressive strut elements. A large number of strut models have been proposed in the literature, but recent studies have demonstrated that it is not possible to apply one strut model to all infill-frame structures. It has been found that changing the properties of an infill-frame can also change the geometric properties of struts, namely width, location and number of struts in an equivalent strut model. For this reason, recent studies have proposed a case-specific strut modelling approach. In the current study, a macro script available in the literature that can be used to generate a detailed finite element (FE) model has been applied to construct and analyse a number of infill-frames with different material and geometric properties. Sensitivity analyses on some of these infill-frames have also been conducted by varying the material properties of the infill, and the amount and distribution of vertical loads on the frame. The results of detailed FE analyses, more specifically contours of the compressive principal stresses, have been used to define the geometric properties of the struts of case-specific strut models for each of the infill-frames. Equivalent strut models were then analysed and compared. Further, the proposed strut models were applied to other infill-frames selected for this study; two strut models from the literature were also applied to these infill-frames. It was concluded that the geometric properties of, and the vertical load on an infill-frame can be related to the geometric properties of its equivalent strut model. In contrast, a variation of up to 25% in the masonry material properties did not have a significant effect on the strut properties. It was shown that casespecific strut modelling is a versatile and generic technique that can adequately replicate the highly nonlinear behaviour of infill-frames regardless of their geometric or material properties. By expanding the current research, it is hoped that a rigorous classification of infill-frames and their relevant equivalent strut models can be developed to assist structural engineers in their everyday design tasks.
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Kožík, Jiří. "Objekt občanské vybavenosti." Master's thesis, Vysoké učení technické v Brně. Fakulta stavební, 2020. http://www.nusl.cz/ntk/nusl-410032.

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Subject of the solution master´s thesis is new civil building. It is five floors building with underground floor. The structual system is made by combination of RC frame and loadbearing masonry with monoplane roof. In underground floor is a garage. In First floor is designed for commercial and comunal activities. In next floors there is always 8 flats. Building is located in straight terrain in the development area of new houses in Zlin in area Bartosova.
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Bor-MinChang and 張博閔. "Backbone Model for Partially Confined Masonry Panels in RC Frames." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/69jxz3.

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碩士
國立成功大學
建築學系
106
A nonlinear push-over analytical model for Taiwan’s partially confined masonry in RC frames is re-established in this research, which is based on the existing analytical model and the inductive conclusions of the structural behavior observed in the experiments. By comparing the results of the new analytical model and those of studies at home and abroad, it is observed that theoretical curves and performance points’ strength can effectively reflect experimental results. Furthermore, the determination of both masonry panels’ failure mode and whether shear failure occurred in columns is also accurate.
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Manju, M. A. "Numerical Investigation of Masonry Infilled RC Frames Subjected to Seismic Loading." Thesis, 2016. http://hdl.handle.net/2005/3156.

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Reinforced concrete frames, infilled with brick/concrete block masonry, are the most common type of structures found in multi-storeyed constructions, especially in developing countries. Usually, the infill walls are considered as non-structural elements even though they alter the lateral stiffness and strength of the frame significantly. Approximately 80% of the structural cost from earthquakes is attributable to damage of infill walls and to consequent damages of doors, windows and other installations. Despite the broad application and economical significance, the infill walls are not included in the analysis because of the design complexity and lack of suitable theory. But in seismic areas, ignoring the infill-frame interaction is not safe because the change in the stiffness and the consequent change in seismic demand of the composite structural system is not negligible. The relevant experimental findings shows a considerable reduction in the response of infilled frames under reverse cyclic loading. This behaviour is caused by the rapid degradation of stiffness, strength, and low energy dissipation capacity resulting from the brittle and sudden damage of the unreinforced masonry infill walls. Though various national/international codes of practice have incorporated some of the research outcomes as design guidelines, there is a need and scope for further refinement. In the initial part of this work, a numerical modelling and linear elastic analysis of masonry infilled RC frames has been done. A multi-storey multi-bay frame infilled with masonry panels, is considered for the study. Both macro modelling and micro modelling strategies are adopted. Seismic loading is considered and an equivalent static analysis as suggested in IS 1893, 2002 is done. The results show that the stiffness of the composite structure is increased due to the obvious confinement effects of infill panels on the bounding frame. A parametric study is conducted to investigate the influence of size and location of openings, presence/absence of infill panels in a particular storey and elevation irregularity in terms of floor height. The results show that the interaction of infill panel changes the seismic response of the composite structure significantly. Presence of openings further changes the seismic behaviour. Increase in openings increases the natural period and introduce newer failure mechanisms. Absence of infill in a particular storey (an elevation irregularity) makes it drift more compared to adjacent storeys. Since the structural irregularities influence the seismic behaviour of a building considerably, we should be cautious while construction and renovation of such buildings in order to take the advantage of increased strength and stiffness obtained by the presence of infill walls. A nonlinear dynamic analysis of masonry infilled RC frames is presented next. Material non linearity is considered for the finite element modelling of both masonry and concrete. Concrete damage plasticity model is employed to capture the degradation in stiffness under reverse cyclic loading. A parametric study by varying the same parameters as considered in the linear analysis is conducted. It is seen that the fundamental period calculation of infilled frames by conventional empirical formulae needs to be revisited for a better understanding of the real seismic behaviour of the infilled frames. Enhancement in the lateral stiffness due to the presence of infill panel attracts larger force and causes damage to the composite system during seismic loading. Elevation irregularities included absence of infill panels in a particular storey. Soft storey shows a tendency for the adjacent columns to fail in shear, due to the large drift compared to other storeys. The interstorey drift ratios of soft storeys are found to be larger than the limiting values. However this model could not capture the separation at the interfaces and related failure mechanisms. To improve the nonlinear model, a contact surface at the interface is considered for a qualitative analysis. A one bay one storey infilled frame is selected. The material characteristics were kept the same as those used in the nonlinear model. Contact surface at the interface was given hard contact property with pressure-overclosure relations and suitable values of friction at the interface. This model could simulate the compressive diagonal strut formation and the switching of this compressive strut to the opposite diagonal under reverse cyclic loading. It showed an indication of corner crushing and diagonal cracking failure modes. The frame with central opening showed stress accumulation near the corners of opening. Next, the micro modelling strategy for masonry suggested by Lourenco is studied. This interface element can be used at the masonry panel-concrete frame interface as well as at the expanded masonry block to block interface. Cap plasticity model (modified Drucker – Prager model for geological materials) can be used to describe the behaviour of masonry (in terms of interface cracking, slipping, shearing) under earthquake loading. The blocks can be defined as elastic material with a potential crack at the centre. However, further experimental investigation is needed to calibrate this model. It is required to make use of the beneficial effects and improve upon the ill-effects of the presence of infills. To conclude, infill panels are inevitable for functional aspects such as division of space and envelope for the building. Using the lateral stiffness, strength contribution and energy dissipation capacity, use of infill panels is proposed to be a wiser solution for reducing the seismic vulnerability of multi-storey buildings.
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Hsiue, Kai-Yuan, and 薛凱元. "In-Plane Behavior of Slender Unreinforced Masonry Walls in RC Frames." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/27651443336417954198.

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碩士
國立成功大學
建築學系碩博士班
96
Slender unreinforced masonry (URM) walls can easily be found in typical RC school buildings in Taiwan, in-filled between RC frames and doors or windows due to the need for opening. Since the walls are only 60~100cm wide with a slenderness ratio more than 1 and lack of vertical boundary members, they are usually damaged by flexural bending in earthquakes. Based on the failing behavior investigated from in-site tests and the concept from former researches, an analytical model for flexural cracking and ultimate strength of slender URM walls is established in this thesis. From the observation in in-site tests for existing school buildings, it is found that when the slender URM wall is subjected to lateral loading comes from the top slab, horizontal flexural cracks appears along its top and bottom edges at once due to lack of tensile capacity. However, with sufficient vertical confinement by RC boundary frame, an inclined strut can form between the top and bottom compressive zones and provide lateral resistance by arching action. In the analytical model, the lateral resistance is derived from equilibrium of the couple by eccentric resultant compression at the top and bottom compressive zones and the moment resulted from lateral load. By assuming the wall is nearly rigid between cracked sections, the strain and depth of compressive zone can be derived geometrically. A stress-strain relationship for masonry is then employed to calculate the compressive stress and resultant compression. The lateral load-drift curve can be obtained by repeating the calculation for any given drift and the maximum load in the curve means the flexural ultimate strength of the wall. The model shows that analytical flexural ultimate strength of URM walls is proportional to its uniaxial compressive strength and almost inversely proportional to the slenderness ratio. The effect by simultaneously applied axial loading is also considered in this model. It appears that the analytical flexural strength increases slightly with the increase of initial axial loading less than about 60% of the ultimate axial strength but decreased rapidly after axial loading exceeds the range. Determination of analytical failure mode by introducing an existing model for shear strength is presented in the thesis as well. Comparison with experimental results shows that the analytical flexural strength and load-drift curves are conservative and reasonable.
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Book chapters on the topic "RC and masonry"

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Manohar, Sharad, and Suhasini Madhekar. "Confined and Reinforced Masonry Buildings." In Seismic Design of RC Buildings, 349–85. New Delhi: Springer India, 2015. http://dx.doi.org/10.1007/978-81-322-2319-1_9.

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De Luca, F., E. Morciano, D. Perrone, and M. A. Aiello. "MID1.0: Masonry Infilled RC Frame Experimental Database." In Lecture Notes in Civil Engineering, 147–60. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-78936-1_11.

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Costa, Alexandre A., Bruno Quelhas, and João P. Almeida. "Numerical Modelling Approaches for Existing Masonry and RC Structures." In Structural Rehabilitation of Old Buildings, 285–305. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-39686-1_10.

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Rai, Durgesh C., Bhushan Raj Selvaraj, and Lalit Sagar. "Masonry-Infilled RC Frames Strengthened with Fabric-Reinforced Cementitious Matrix." In Emerging Trends of Advanced Composite Materials in Structural Applications, 31–65. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-16-1688-4_2.

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Verma, Surender Kumar, Kuldeep Kumar, and Sameer Dogra. "Effect of Masonry Infills on Seismic Response of RC Framed Buildings." In RILEM Bookseries, 231–50. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-51485-3_15.

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Barnaure, M. "Structural Irregularities in RC Frame Structures Due to Masonry Enclosure Walls." In Seismic Behaviour and Design of Irregular and Complex Civil Structures III, 97–110. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-33532-8_9.

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Patel, Nirav, and Sandip A. Vasanwala. "Evaluation of Response Reduction Factor for Un-reinforced Masonry-Infilled RC Buildings." In Advances in Intelligent Systems and Computing, 525–35. Singapore: Springer Singapore, 2018. http://dx.doi.org/10.1007/978-981-13-1966-2_47.

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Rodrigues, João, Jelena Milosevic Ilic, and Rita Bento. "Seismic Retrofitting of Irregular Mixed Masonry-RC Buildings: Case Study in Lisbon." In Seismic Behaviour and Design of Irregular and Complex Civil Structures IV, 163–75. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-83221-6_14.

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Pallarés, F. J., A. Agüero, and L. Pallarés. "Seismic considerations in the dynamic characteristics of masonry infilled RC frames based on experimental tests." In Current Perspectives and New Directions in Mechanics, Modelling and Design of Structural Systems, 179–82. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003348443-28.

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Pallarés, F. J., A. Agüero, and L. Pallarés. "Seismic considerations in the dynamic characteristics of masonry infilled RC frames based on experimental tests." In Current Perspectives and New Directions in Mechanics, Modelling and Design of Structural Systems, 61–62. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003348450-28.

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Conference papers on the topic "RC and masonry"

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Zhang, Fei, and Jianxun Ma. "Experimental Study on Hybrid Masonry Structure with RC Frame under Lateral Reversed Cyclic Loading." In IABSE Conference, Kuala Lumpur 2018: Engineering the Developing World. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2018. http://dx.doi.org/10.2749/kualalumpur.2018.0142.

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<p>As a new type of structural system, hybrid masonry (HM) structure with reinforced concrete (RC) frame is constructed of reinforced block masonry wall and reinforced concrete frame. This structural system combines the advantages of reinforced concrete frame structure and reinforced concrete block masonry structure, also overcomes some limitations of them. In order to study the seismic performance of the structural system, the lateral reversed cyclic loading experiment on the HM structure with RC frame was conducted. In the experiment, two specimens that were constructed with different connecting type were designed and tested, in one of them the masonry blocks was separated from the RC frame and only connected with steel keys at the top part of the specimen, while in the other there was no spacing between the RC frame and the masonry blocks. According to the data of the experiment, the paper analyzed the failure process and patterns, hysteretic characteristic, skeleton curve, stiffness degradation and displacement ductility of the structural system, and compared the results of the two specimens. The experimental study indicated that the HM structure with RC frame showed extraordinary good seismic performance during testing, and this form of construction had fairly good displacement ductility and energy dissipation, which would provide a basis for further theoretical analysis and design method.</p>
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"Shear Performance of FRCM Strengthened RC Beams." In SP-324: Composites with Inorganic Matrix for Repair of Concrete and Masonry Structures. American Concrete Institute, 2018. http://dx.doi.org/10.14359/51702359.

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"Numerical Analysis of RC Beams Strengthened with SRG." In SP-324: Composites with Inorganic Matrix for Repair of Concrete and Masonry Structures. American Concrete Institute, 2018. http://dx.doi.org/10.14359/51702358.

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Filippou, Christiana, Christis Chrysostomou, and Nicholas Kyriakides. "NUMERICAL MODELING OF MASONRY-INFILLED RC FRAME STRENGTHENED WITH TRM." In 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering Methods in Structural Dynamics and Earthquake Engineering. Athens: Institute of Structural Analysis and Antiseismic Research School of Civil Engineering National Technical University of Athens (NTUA) Greece, 2019. http://dx.doi.org/10.7712/120119.7136.19665.

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Trajchevski, Zoran, and Golubka Nechevska-Cvetanovska. "THE ROLE OF MASONRY INFILL ON SEISMIC BEHAVIOUR OF RC BUILDINGS." In 1st Croatian Conference on Earthquake Engineering. University of Zagreb Faculty of Civil Engineering, 2021. http://dx.doi.org/10.5592/co/1crocee.2021.107.

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Cavaleri, L., F. di Trapani, and M. Papia. "ANALYSIS OF LOCAL SHEAR EFFECTS IN BRICK MASONRY INFILLED RC FRAMES." In 4th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering. Athens: Institute of Structural Analysis and Antiseismic Research School of Civil Engineering National Technical University of Athens (NTUA) Greece, 2014. http://dx.doi.org/10.7712/120113.4715.c1533.

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Marinković, Marko, and Christoph Butenweg. "EXPERIMENTAL AND NUMERICAL ANALYSIS OF RC FRAMES WITH DECOUPLED MASONRY INFILLS." In 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering Methods in Structural Dynamics and Earthquake Engineering. Athens: Institute of Structural Analysis and Antiseismic Research School of Civil Engineering National Technical University of Athens (NTUA) Greece, 2019. http://dx.doi.org/10.7712/120119.7088.18845.

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Pruthvi, D., K. Sudha, and H. Nayana. "Dynamic Analysis Of Masonry Infill Rc Frames For Soft Storey Criteria." In Third International Conference on Current Trends in Engineering Science and Technology ICCTEST-2017. Grenze Scientific Society, 2017. http://dx.doi.org/10.21647/icctest/2017/49093.

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Yamazaki, Ryohei. "Reinforcement of old masonry by new structure." In IABSE Conference, Kuala Lumpur 2018: Engineering the Developing World. Zurich, Switzerland: International Association for Bridge and Structural Engineering (IABSE), 2018. http://dx.doi.org/10.2749/kualalumpur.2018.0451.

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<p>KITAKARO Sapporo Honkan is a project that harmonized the new and old by creating a new interior space and maintaining the exterior with contemporary technology .</p><p>In this project, by reinforcing the outer wall of a brick masonry building and a part of the hall with new RC structure, it converted confectionary store .</p><p>Reinforcement methods are as below, 1) Reinforce the brick wall to be preserved, secure the safety while construct, then dismantle existing part 2) Construct a new structure and integrate it with the existing brick wall.</p>
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Salamida, Gianluca, and Nicola Buratti. "FRAGILITY MODELS FOR EXISTING MASONRY INFILLED RC FRAMES IN THE EMILIA AREA." In 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering Methods in Structural Dynamics and Earthquake Engineering. Athens: Institute of Structural Analysis and Antiseismic Research National Technical University of Athens, 2021. http://dx.doi.org/10.7712/120121.8699.18863.

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