摘要
通过24片1/2模型的空斗墙墙体和3片1/2模型的实砌墙体,在低周反复荷载下试验,研究3种砌筑方式的空斗墙在2种高宽比、4种砂浆强度和2种竖向压应力的影响下,墙体的抗剪承载力和破坏模式。建立有限元分析模型,分析砌筑方式、材料强度、高宽比和竖向压应力对空斗墙抗剪性能的影响。研究表明:不同砌筑方式的空斗墙极限荷载接近,约为实砌墙体的60%～85%;抗剪承载力随着砖和砂浆强度的提高而增大;抗剪承载力随着高宽比的增大而减小,破坏模式从剪切破坏转变为弯曲破坏;当N/Nu=0.6左右时,抗剪承载力最大。在此基础上提出空斗墙的抗剪强度计算公式。
Based on the experimental study of twenty four half-scale row lock walls and three half-scale solid walls subjected to horizontal low-cycle loading , the capability of shear and failure pattern were analyzed, with the influence of three brickwork modes, two kinds of aspect ratio, four kinds of strength of mixed mortar and two kinds of vertical stress. The influence of brickwork mode, material strength, aspect ratio and vertical stress were analyzedby using the finite element model. The test and analysis results show that ： the ultimate load of row lock walls with different brickwork modes is about 60% - 85% of the ultimate load of solid wall. The shear bearing capacity increases as the material strength increases. The shear bearing capacity reduces as the aspect ratio increases, and the failure pattern is changed from shear failure to bending failure. When N/N. is about 0. 6, the shear bearing capacity is the greatest. The capability shear formula of the row lock walls is presented.
出处
《地震工程与工程振动》
CSCD
北大核心
2013年第1期88-96,共9页
Earthquake Engineering and Engineering Dynamics
基金
国家"十二五"科技支撑计划项目(2011BAJ08B02)
湖南省住建厅2010科技计划项目(201003)
关键词
空斗墙
抗剪性能
低周反复荷载试验
有限元
row lock wall
shear behavior
low-cycle loading test
finite elment
