开洞砌体墙抗震性能的有限元分析  

Finite element analysis on seismic performance of masonry walls with openings

作　　者：胡亮霞[1] 杨威[1] 朱尔玉[2] 朱坤[2] 王满生[1] 陈俞[1] 

机构地区：[1]北京市房地产科学技术研究所,北京100021 [2]北京交通大学土木建筑工程学院,北京100044

出　　处：《建筑结构》2015年第17期77-82,共6页Building Structure

基　　金：北京市财政支持项目资助(PXM2010-161102-096238)

摘　　要：砌体墙开设门窗洞口会导致其平面内的刚度及抗剪承载力降低,而开洞砌体墙的分布不均衡又使得地震作用下整体结构出现扭转变形,从而加大地震震害。以3片开洞砌体墙的拟静力试验为原型,采用ABAQUS有限元程序对3个模型(未加固的开洞砌体墙A-1、单面钢筋网加固的开洞砌体墙A-2、单面钢筋网和钢窗框同时加固的开洞砌体墙A-3)进行建模和非线性计算,得出了在低周反复水平荷载作用下砌体墙的荷载-位移滞回曲线,并通过对滞回曲线的处理,对比分析了应力云图、应变云图、滞回特性、砌体墙耗能、骨架曲线和刚度退化曲线,验证了有限元模型的合理性和有效性,同时也验证了加固措施的有效性。In-plane stiffness and shear capacity of masonry walls are decreased by openings. Along with unbalanced distribution of openings, torsion deformation which aggravates the seismic hazard easily occurs under seismic excitation. Based on the quasi-static experiments of three masonry walls with openings, 3 models of original model A-1, reinforced model A-2 by one-side mesh reinforcement mortar and reinforced model A-3 by both one-side mesh reinforcement mortar and steel window frame were established by ABAQUS software and nonlinear calculations were carried out. The loading-displacement hysteretic curves of all three models were obtained under the low-cyclic lateral loads. In analyses of hysteretic curves, stress and strain contours, hysteretic characteristics, energy dissipation of masonary walls, skeleton curves and stiffness degradation curves were compared. The FEM models as well as the reinforcement measures were verified to be reasonable and effective.

关 键 词：开洞砌体墙 滞回曲线 加固 钢窗框 钢丝网水泥砂浆 

分 类 号：TU522[建筑科学—建筑技术科学]