摘要
为研究空腔墙的滞回性能,开展了一个普通墙和三个空腔墙的拟静力试验,并提出了适用于空腔墙的数值建模方法.分析了不同墙体的塑性发展、破坏形态,以及特征点的荷载、变形和受力差异.研究结果表明:低矮剪力墙的破坏模式为剪切破坏,耗能能力低、延性差;在低矮剪力墙中设置空腔可有效地降低剪力墙的刚度和承载力,空腔越大,其刚度和承载能力降低越多;空腔的存在使得暗柱和空腔壁的裂缝发展和分布更加均匀细密,更有利于耗能,在剪力墙中通过合理设置空腔,可以实现刚度、承载力和延性的合理匹配;通过放松剪力墙底部的约束和设置多个空腔可以达到提高剪力墙延性和改善破坏模式的目的.提出的分层壳模型可以较准确地分析和预测空腔墙在侧向荷载作用下的内力和位移响应.
A quasi-static test of a common wall and three cavity walls was carried out to study the cyclic performance of reinforced concrete cavity wall.A numerical modeling method was developed for the cavity walls and was implemented.Based on the experimental analysis,the plastic development,failure modes,load and deformation at key points were analyzed,and the stress differences of different walls were studied.Research results indicate that the general squat shear wall’s failure mode is dominated by shear and the setting of the cavity could effectively reduces the stiffness and loading capacity of the shear wall.The cavity makes the development and distribution of cracks in the side walls more uniform and finer.It is possible to achieve the rational matching of the stiffness,loading capacity and ductility by setting reasonable cavity in shear wall.The purpose of improving the ductility and optimizing the failure mode of shear wall can be achieved by relaxing the constraints of the bottom of the shear wall or setting several cavities.The layered shell model proposed can accurately analyze and predict the internal force and displacement responses of cavity walls under lateral loads.
作者
徐刚
张瑞君
李爱群
XU Gang;ZHANG Ruyun;LI Aiqun(School of Civil Engineering, Southeast University, Nanjing 211189, China;Beijing Advanced Innovation Center for Future Urban Design, Beijing University of Civil Engineering and Architecture, Beijing 100044, China)
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2019年第7期13-18,共6页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家重点研究发展计划资助项目(2017YFC0703600)
关键词
空腔墙
拟静力试验
滞回性能
分层壳模型
数值建模
cavity wall
quasi-static test
cyclic performance
multilayer shell element model
numerical modeling
