摘要
基于ABAQUS有限元软件对填充墙钢筋混凝土框架结构进行了分离式建模,利用已有的试验结果对其进行了验证。将地震作用下同时承受平面内外荷载的填充墙平面外行为简化为平面内维持加载的数值模型的平面外行为;将震损填充墙在余震作用下的平面外行为简化为平面内卸载的数值模型的平面外行为。利用有限元模型研究了平面内维持加载与卸载两种情况下,不同程度的平面内损伤对填充墙平面外抗震性能的影响。对于采用的实体蒸压加气混凝土砌块,维持IDR使填充墙的边界约束条件较强,平面内损伤对平面外承载力影响较小,但平面外变形导致填充墙在平面内退出工作。平面内卸载的填充墙平面内损伤引起的平面外承载力和初始刚度下降幅度较大,当IDR为2%时,平面外承载力与初始刚度下降幅度均大于50%。
In this paper,based on the ABAQUS finite element software,we established the separated finite element models for the masonry infill walls in reinforced concrete(RC)buildings,and verified the models by the available test.Firstly,the out-ofplane behaviour of infilled walls subjected to both in-plane and out-of-plane loads during an earthquake excitation is simplified to the out-of-plane behavior of the numerical models under the in-plane sustained loading,and the out-of-plane behaviour of infill walls during aftershocks excitation is simplified to the out-of-plane behaviour of numerical models under the in-plane unloading.Secondly,the finite element models is utilized to investigate the effects of different degrees of the in-plane damage on the out-of-plane seismic performance of infilled walls under the in-plane sustained loading and unloading respectively.The results show that,as for the solid autoclaved aerated concrete block infill wall,maintaining interstory drift ratio(IDR)makes the boundary constraints of the infilled wall strong,and the effect of the in-plane damage on the out-of-plane load carrying capacity is little,but the out-of-plane deformation makes the infill wall cease to carry in-plane load.The out of plane bearing capacity and initial stiffness of infilled wall unloaded in plane decrease greatly.When IDR is 2%,the out of plane bearing capacity and initial stiffness decrease more than 50%.
作者
马金铠
孔璟常
王晓敏
赵伟通
曲淑英
MA Jinkai;KONG Jingchang;WANG Xiaomin;ZHAO Weitong;QU Shuying(School of Civil Engineering,Yantai University,Yantai 264005,China;Institute of Engineering Mechanics,CEA,Harbin 150080,China)
出处
《防灾科技学院学报》
2021年第4期18-33,共16页
Journal of Institute of Disaster Prevention
基金
中国地震局工程力学研究所基本科研业务费专项(2018D15)
国家自然科学基金(51808478)
山东省自然科学基金(ZR2019QEE033)。
关键词
填充墙
平面内损伤
平面外抗震性能
有限元模拟
masonry infilled wall
in-plane damage
out-of-plane seismic performance
finite element simulation
