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An effective simplified model of composite compression struts for partially-restrained steel frame with reinforced concrete infill walls 被引量:2
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作者 Sun Guohua Chuang-Sheng Walter Yang +1 位作者 Gu Qiang Reginald DesRoches 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2018年第2期403-415,共13页
To resolve the issue regarding inaccurate prediction of the hysteretic behavior by micro-based numerical analysis for partially-restrained(PR)steel frames with solid reinforced concrete(RC)infill walls,an innovati... To resolve the issue regarding inaccurate prediction of the hysteretic behavior by micro-based numerical analysis for partially-restrained(PR)steel frames with solid reinforced concrete(RC)infill walls,an innovative simplified model of composite compression struts is proposed on the basis of experimental observation on the cracking distribution,load transferring mechanism,and failure modes of RC infill walls filled in PR steel frame.The proposed composite compression struts model for the solid RC infill walls is composed ofαinclined struts and main diagonal struts.Theαinclined struts are used to reflect the part of the lateral force resisted by shear connectors along the frame-wall interface,while the main diagonal struts are introduced to take into account the rest of the lateral force transferred along the diagonal direction due to the complicated interaction between the steel frame and RC infill walls.This study derives appropriate formulas for the effective widths of theαinclined strut and main diagonal strut,respectively.An example of PR steel frame with RC infill walls simulating simulated by the composite inclined compression struts model is illustrated.The maximum lateral strength and the hysteresis curve shape obtained from the proposed composite strut model are in good agreement with those from the test results,and the backbone curve of a PR steel frame with RC infill walls can be predicted precisely when the inter-story drift is within 1%.This simplified model can also predict the structural stiffness and the equivalent viscous damping ratio well when the inter-story drift ratio exceeds 0.5%. 展开更多
关键词 PR connection steel frame infill walls shear connector hysteretic behavior STRUT
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A Theoretical Study the Effect of Openings in Infill Wall Panels on the Behavior of Structures
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作者 Umary Jamal 《Journal of Southeast University(English Edition)》 EI CAS 1998年第1期98-101,共4页
Two dimensional,reinforced concrete building frames built on raft foundation and having infill wall panels with openings in them are analysed using the direct stiffness method.Beams and columns are modelled by beam co... Two dimensional,reinforced concrete building frames built on raft foundation and having infill wall panels with openings in them are analysed using the direct stiffness method.Beams and columns are modelled by beam column elements.Wall panels are modelled by plane stress finite elements.The raft foundation is modelled by uniaxial finite elements.The soil is modelled as half space model.Openings in wall panels are introduced by using fictitious beams between real floor beams. A computer program is written to carry out the static analysis and do the necessary comparison to show the effect of openings on the structural behavior. 展开更多
关键词 infill wall panels OPENINGS direct stiffness method horizontal displacement STATIC SEISMIC
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Effects of timber infill walls on the seismic behavior of traditional Chinese timber frames
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作者 Xie Qifang Zhang Baozhuang +2 位作者 Li Shengying Wu Fanfan Yang Huifeng 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2022年第4期999-1018,共20页
This study investigates the enhanced effect of timber infill walls on the seismic behavior of traditional Chinese timber frames.Two 1/2 scaled traditional Chinese timber infill walls(TIWs),two 1/2 scaled timber frames... This study investigates the enhanced effect of timber infill walls on the seismic behavior of traditional Chinese timber frames.Two 1/2 scaled traditional Chinese timber infill walls(TIWs),two 1/2 scaled timber frames with timber infill walls(TFTIWs)and one 1/2 scaled timber frame(TF)were fabricated and tested under low-cyclic reversed loading.The failure modes,strength,stiffness,and energy consumption capacity of the TIWs and the TFTIWs were obtained,and the effects of the TIWs on the seismic performance of the TFTIWs were investigated.The results showed that the TIWs can increase the stiffness and ultimate bearing capacity of the TF,up to 60%and 80%,respectively.The strength degradation coefficient of the TFTIWs was slightly higher than that of the TF when the inter-story drift ratio exceeded 0.02 rad,and the TIWs helped to mitigate the strength degradation of the TFTIWs.It was also found that the TFTIWs had a higher cumulative energy dissipation when compared with the TF(up to a 60%increase),indicating the TIWs had reasonably good energy dissipation capacity.When the TIWs generated a solid contribution to the carrying capacity and energy dissipation of the TF,the lateral drift thresholds were 1/100 and 1/43 of the column height,respectively.Furthermore,the TIWs and TFTIWs presented a good ductility,and the TIW could effectively reduce the pull-out amount of the tenon from the mortise of the TF;however,the TIWs had little influence on the stiffness degradation level or improvement of the ductility of the TF. 展开更多
关键词 traditional Chinese timber frame timber infill wall mortise-tenon joint cyclic loading test seismic behavior
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Study on the effect of the infill walls on the seismic performance of a reinforced concrete frame
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作者 Zhang Cuiqiang Zhou Ying +1 位作者 Zhou Deyuan Lu Xilin 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2011年第4期507-517,共11页
Motivated by the seismic damage observed to reinforced concrete (RC) frame structures during the Wenchuan earthquake, the effect of infill walls on the seismic performance of a RC frame is studied in this paper. Inf... Motivated by the seismic damage observed to reinforced concrete (RC) frame structures during the Wenchuan earthquake, the effect of infill walls on the seismic performance of a RC frame is studied in this paper. Infill walls, especially those made of masonry, offer some amount of stiffness and strength. Therefore, the effect of infill walls should be considered during the design of RC frames. In this study, an analysis of the recorded ground motion in the Wenehuan earthquake is performed. Then, a numerical model is developed to simulate the infill walls. Finally, nonlinear dynamic analysis is carried out on a RC frame with and without infill walls, respectively, by using CANNY software. Through a comparative analysis, the following conclusions can be drawn. The failure mode of the frame with infill walls is in accordance with the seismic damage failure pattern, which is strong beam and weak column mode. This indicates that the infill walls change the failure pattern of the frame, and it is necessary to consider them in the seismic design of the RC frame. The numerical model presented in this paper can effectively simulate the effect of infill walls on the RC frame. 展开更多
关键词 infill walls RC frame structure strong column and weak beam strong beam and weak column nonlinear time history analysis
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Shaking test research on connection modes between block infill wall and frame beam
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作者 程云 刘明 +1 位作者 刘晓伟 王冰 《Journal of Harbin Institute of Technology(New Series)》 EI CAS 2011年第5期123-129,共7页
In order to achieve an optimal anti-seismic behavior,or rather stability,the out-of-plane stability of infill wall in frame has been researched with the shaking test of four sets of two-layer infill wall,in which four... In order to achieve an optimal anti-seismic behavior,or rather stability,the out-of-plane stability of infill wall in frame has been researched with the shaking test of four sets of two-layer infill wall,in which four different connection modes of filled with inclined bricks on the top,disconnection,flexibility and semi-flexibility were adapted.The acceleration and displacement response of the specimens were analyzed under the seismic load.Also,some feasible connection modes were gained by comparing the response of infill walls.Finally,the calculation of earthquake of infill wall was held.The results showed that seismic responses of the infill walls whose connect with frame in form of flexibility and semi-flexibility modes are weaker than others obviously,and their integrality is better.Thus the conclusion could be drawn that out-of-plane stability of the specimens with connection modes of flexibility and semi-flexibility are better than those with the connection modes of filled with inclined bricks on the top and disconnection.The research results can provide evidence for establishing specifications and directing the construction and therefore help reduce the casualties and property loss caused by earthquake disasters. 展开更多
关键词 block infill wall shaking test connection modes ACCELERATION
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Comparative Study on Diagonal Strut Model of Infill Wall
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作者 Zhenling Chai Zixiong Guo +1 位作者 Xiaojuan Liu Yunfan Jiang 《Structural Durability & Health Monitoring》 EI 2018年第3期169-187,共19页
The equivalent diagonal strut models of infill wall mainly include the single strut model and multi-strut model.Firstly,several equivalent strut models and their characteristics are introduced in this paper.Then,model... The equivalent diagonal strut models of infill wall mainly include the single strut model and multi-strut model.Firstly,several equivalent strut models and their characteristics are introduced in this paper.Then,model analysis and pushover analysis are carried out on infilled frame models with the aid of the software SAP2000.Two typical single strut models and a typical three-strut model are used to simulate the panel of the frames respectively.It is indicated that the period reduction factor of the frame with a three-strut model is close to the value recommended by the current code.The infill wall has great influence on the overall stiffness,bearing capacity and weak position of the structure.The stiffness and the bearing capacity of the infilled frame increase with the increase of the number of the infill walls.The unfilled story is the weak position of the infilled frame,and when the unfilled story at the bottom of the infilled frame,the seismic response of the upper infill layer decreases with the increasing of the number of unfilled story. 展开更多
关键词 infill wall equivalent strut model comparative study pushover analysis
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Flexural Behavior of Cross-Connected Brick Masonry Infill Wall Panels Supported on Reinforced Concrete Beam Grids
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作者 BAYOUMI El-Said Abd-Allah MAHMOUD Mahmoud Hassan ARIF Mohammed 《Journal of Shanghai Jiaotong university(Science)》 EI 2024年第5期889-899,共11页
This paper presents an experimental investigation on the flexural behavior of cross-connected brick masonry infill wall panels supported on reinforced concrete beam grids above and below the walls.The experimental pro... This paper presents an experimental investigation on the flexural behavior of cross-connected brick masonry infill wall panels supported on reinforced concrete beam grids above and below the walls.The experimental program was comprised of six wall systems.The effect of change in lower beam stiffness relative to the wall and the geometry of the main walls were investigated.From the results of the experimental tests,the increase in the depth of the lower beam grid reduces the deflection,resulting in an increase in the load carrying capacity of the wall.Further,the stiffness of the main walls affects the deflection and the failure load of the cross walls. 展开更多
关键词 brick masonry infill walls reinforced concrete beam grid main and cross walls STIFFNESS DEFLECTION crack pattern failure load
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Mechanical properties characterization of different types of masonry infill walls
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作者 Andre FURTADO Hugo RODRIGUES +1 位作者 Antonio AREDE Humberto VARUM 《Frontiers of Structural and Civil Engineering》 SCIE EI CSCD 2020年第2期411-434,共24页
It is remarkable,the recent advances concerning the development of numerical modeling frameworks to simulate the infill panels'seismic behavior.However,there is a lack of experimental data of their mechanical prop... It is remarkable,the recent advances concerning the development of numerical modeling frameworks to simulate the infill panels'seismic behavior.However,there is a lack of experimental data of their mechanical properties,which are of full importance to calibrate the numerical models.The primary objective of this paper is to present an extensive experimental campaign of mechanical characterization tests of infill masonry walls made with three different types of masonry units:lightweight vertical hollow concrete blocks and hollow clay bricks.Four different types of experimental tests were carried out,namely:compression strength tests,diagonal tensile strength tests,and flexural strength tests parallel and perpendicular to the horizontal bed joints.A total amount of 80 tests were carried out and are reported in the present paper.The second objective of this study was to compare the mechanical properties of as-built and existing infill walls.The results presented and discussed herein,will be in terms of strain-stress curves and damages observed within the tests.It was observed a fragile behavior in the panels made with hollow clay horizontal bricks,without propagation of cracks.The plaster increased the flexural strength by 57%. 展开更多
关键词 masonry infill walls experimental characterization compression strength shear diagonal strength flexural strength
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Shaking Table Test on Out-of-Plane Stability of Infill Masonry Wall
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作者 刘明 程云 刘晓伟 《Transactions of Tianjin University》 EI CAS 2011年第2期125-131,共7页
The behaviors of infill wall in earthquakes show that infill masonry walls,which are used as nonstructural elements of concrete frames,are vulnerable when they are subjected to earthquake.In order to achieve an optima... The behaviors of infill wall in earthquakes show that infill masonry walls,which are used as nonstructural elements of concrete frames,are vulnerable when they are subjected to earthquake.In order to achieve an optimal antiseismic behavior,or even stability,two methods of connection are investigated.The shaking table tests,with 1:3 scale walls of two-storey model subjected to horizontal earthquake loads,were carried out to investigate the out-of-plane behaviors with different connections between walls and beams.The test results show that the connection methods employed between walls and beams have a significant effect on the out-of-plane stability of infill walls.The walls bound by bars with the beams perform better than those with inclined bricks without gaps. 展开更多
关键词 infill wall OUT-OF-PLANE shaking table ACCELERATION EARTHQUAKE
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Seismic performance evaluation of an infilled rocking wall frame structure through quasi-static cyclic testing 被引量:8
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作者 Pan Peng Wu Shoujun +1 位作者 Wang Haishen Nie Xin 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2018年第2期371-383,共13页
Earthquake investigations have illustrated that even code-compliant reinforced concrete frames may suffer from soft-story mechanism.This damage mode results in poor ductility and limited energy dissipation.Continuous ... Earthquake investigations have illustrated that even code-compliant reinforced concrete frames may suffer from soft-story mechanism.This damage mode results in poor ductility and limited energy dissipation.Continuous components offer alternatives that may avoid such failures.A novel infilled rocking wall frame system is proposed that takes advantage of continuous component and rocking characteristics.Previous studies have investigated similar systems that combine a reinforced concrete frame and a wall with rocking behavior used.However,a large-scale experimental study of a reinforced concrete frame combined with a rocking wall has not been reported.In this study,a seismic performance evaluation of the newly proposed infilled rocking wall frame structure was conducted through quasi-static cyclic testing.Critical joints were designed and verified.Numerical models were established and calibrated to estimate frame shear forces.The results evaluation demonstrate that an infilled rocking wall frame can effectively avoid soft-story mechanisms.Capacity and initial stiffness are greatly improved and self-centering behavior is achieved with the help of the infilled rocking wall.Drift distribution becomes more uniform with height.Concrete cracks and damage occurs in desired areas.The infilled rocking wall frame offers a promising approach to achieving seismic resilience. 展开更多
关键词 infilled rocking wall frame seismic performance displacement distribution quasi-static cyclic test
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Performance of masonry enclosure walls:lessons learned from recent earthquakes 被引量:1
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作者 Romeu Silva Vicente Hugo Rodrigues +2 位作者 Humberto Varum Aníbal Costa Jos António Raimundo Mendes da Silva 《Earthquake Engineering and Engineering Vibration》 SCIE EI CSCD 2012年第1期23-34,共12页
This paper discusses the issue of performance requirements and construction criteria for masonry enclosure and infill walls. Vertical building enclosures in European countries are very often constituted by non-load-be... This paper discusses the issue of performance requirements and construction criteria for masonry enclosure and infill walls. Vertical building enclosures in European countries are very often constituted by non-load-bearing masonry walls, using horizontally perforated clay bricks. These walls are generally supported and confined by a reinforced concrete frame structure of columns and beams/slabs. Since these walls are commonly considered to be nonstructural elements and their influence on the structural response is ignored, their consideration in the design of structures as well as their connection to the adjacent structural elements is frequently negligent or insufficiently detailed. As a consequence, nonstructural elements, as for wall enclosures, are relatively sensitive to drift and acceleration demands when buildings are subjected to seismic actions. Many international standards and technical documents stress the need for design acceptability criteria for nonstructural elements, however they do not specifically indicate how to prevent collapse and severe cracking, and how to enhance the overall stability in the case of moderate to high seismic loading. Furthermore, a review of appropriate measures to improve enclosure wall performance and both in-plane and out-of-plane integrity under seismic actions is addressed. 展开更多
关键词 RC structures masonry enclosure walls infill walls IN-PLANE OUT-OF-PLANE CRACKING performanceimprovement
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An Innovative Seismic Protection System for Conventional RC Buildings
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作者 Zekirija Idrizi Isak Idrizi 《Journal of Civil Engineering and Architecture》 2017年第12期1077-1085,共9页
As capacity design philosophy suggests, the best way to achieve a safe seismic response of multistory buildings, under strong earthquakes, is to uniformly spread the inelastic deformation demands throughout the buildi... As capacity design philosophy suggests, the best way to achieve a safe seismic response of multistory buildings, under strong earthquakes, is to uniformly spread the inelastic deformation demands throughout the building structure. Unfortunately, this type of mechanism is difficult to be reached due to the abundant presence ofinfill wall panels on buildings, which under strong earthquakes show severe cracks and strength degradations, thus complicating the seismic response of buildings. In order to avoid these brittle mechanisms of failure, studies were made toward development of new seismic protection system which would completely protect the infill walls from any cracks and strength degradation manifestations and simultaneously improve the seismic response of the entire structure. Utilization of the "IDRIZI" seismic protection system, would greatly contribute to many important aspects, like the increase of structural seismic performance, drastic reduction of damages under strong earthquake events and avoiding any unpredictable local failure mechanisms on buildings. 展开更多
关键词 infill walls IDRIZI seismic protection system passive control friction device
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Performance evaluation of low-rise infilled reinforced concrete frames designed by considering local effects on column shear demand
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作者 Jarun SRECHAI Wongsa WARARUKSAJJA +1 位作者 Sutat LEELATAVIWAT Suchart LIMKATANYU 《Frontiers of Structural and Civil Engineering》 SCIE EI CSCD 2023年第5期686-703,共18页
The interactions between reinforced concrete(RC)frames and infill walls play an important role in the seismic response of frames,particularly for low-rise frames.Infill walls can increase the overall lateral strength ... The interactions between reinforced concrete(RC)frames and infill walls play an important role in the seismic response of frames,particularly for low-rise frames.Infill walls can increase the overall lateral strength and stiffness of the frame owing to their high strength and stiffness.However,local wall-frame interactions can also lead to increased shear demand in the columns owing to the compressive diagonal strut force from the infill wall,which can result in failure or in serious situations,collapse.In this study,the effectiveness of a design strategy to consider the complex infill wall interaction was investigated.The approach was used to design example RC frames with infill walls in locations with different seismicity levels in Thailand.The performance of these frames was assessed using nonlinear static,and dynamic analyses.The performance of the frames and the failure modes were compared with those of frames designed without considering the infill wall or the local interactions.It was found that even though the overall responses of the buildings designed with and without consideration of the local interaction of the infill walls were similar in terms the overall lateral strength,the failure modes were different.The proposed method can eliminate the column shear failure from the building.Finally,the merits and limitations of this approach are discussed and summarized. 展开更多
关键词 reinforced concrete frames infill wall seismic design method shear failure wall-frame interaction
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谈高层建筑填充墙裂缝控制 被引量:1
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作者 张军 《山西建筑》 2016年第34期95-96,共2页
论述了高层建筑填充墙裂缝的危害性,并针对填充墙裂缝的产生原因,从材料、设计、施工三个环节,提出了裂缝的控制措施,有利于提高高层建筑的美观性与安全性。
关键词 高层建筑 填充墙 结构裂缝 防裂措施
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The Research of Formations Intended to the Prevention of Lateral Strain of Columns
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作者 Cemal Eyyubov Mehmet Hasnalbantt Isa Eyyubov 《Journal of Civil Engineering and Architecture》 2016年第10期1085-1096,共12页
In this paper, the research for the constructive formations preventing the buckling of the columns is being covered. Especially, the behavior of the constructive support elements which are used during the design of th... In this paper, the research for the constructive formations preventing the buckling of the columns is being covered. Especially, the behavior of the constructive support elements which are used during the design of the industry building's columns is analyzed. The preparation of constructive formations which is intended to the prevention of changing shape and the proposals aimed at the use of widespread construction practices are being covered. 展开更多
关键词 Rigidity connection lateral support element lateral deformation rigidity connection with infilled wall rigidity shear wall
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