290厚剪切型破坏模式砌块整浇墙耗能性能研究  

Research on energy dissipation performance for fully grouted reinforced concrete masonry shear walls with 290 mm width and their shear failure

作　　者：赵艳[1,2] 王凤来[1,2] 陈君军[2,3] 

机构地区：[1]结构工程灾变与控制教育部重点实验室(哈尔滨工业大学),黑龙江哈尔滨150090 [2]哈尔滨工业大学土木工程学院,黑龙江哈尔滨150090 [3]国内贸易工程设计研究院,北京100069

出　　处：《地震工程与工程振动》2014年第4期188-194,共7页Earthquake Engineering and Engineering Dynamics

基　　金：国家科技支撑计划项目(2013BAJ12B03)

摘　　要：通过6片足尺发生剪切破坏模式的砌块整浇墙低周往复荷载试验,研究了在压弯剪复合受力下墙体的耗能性能。基于试验得到墙体滞回曲线,计算各个墙体的累积耗散能和单圈耗散能,二者均随着位移的增大而线性增长,但前者的增长速度更快,表明随着墙体进入非弹性阶段,耗能能力增长速度逐渐减慢。针对各个试件的标准化累积耗能进行回归分析,得到满足线性增长规律的耗能方程。研究结果表明：能量耗散系数和等效黏滞阻尼比均随着位移的增大基本保持不变,等效黏滞阻尼比的范围大约在6%~16%之间。通过能量耗散系数、等效黏滞阻尼比和功比指数三个参数对比各个墙体的耗能能力,得出高宽比对剪切破坏模式墙体的耗能性能影响较大,而竖向压应力的影响较小,可以忽略不计。This paper intends to investigate the energy dissipation performance of fully grouted reinforced concrete masonry shear walls and their shear failure under the combined action of compression, bending moment and shear. The study is based on the tests of 6 full-scale fully grouted sample models subjected to low cyclic reversed lateral loading. The hysteretic curves of the walls are extracted from the tests records, and the cumulative dissipated energy as well as dissipated energy during one cycle of loading is obtained. Both of the two energy quantities have a lin- ear increment with the increase Of displacement. However, the cumulative dissipated energy has a much larger rate of increment, which indicates that the energy-dissipation capacity grows slowly as walls deform into the inelastic stage. Energy-dissipation equations satisfying the linear increment law are derived after regression on the normalized cumulative energy. Energy dissipation coefficient and equivalent viscous damping ratio almost remain constant as the increase of displacement. The calculated equivalent viscous damping ratio varies between 6% and 16% within the whole displacement domain. After comparing the energy dissipation capacity of each wall according to the three parameters of the energy dissipation coefficient, the equivalent viscous damping ratio and the power ratio index, itcan be indicated that the energy dissipation capacity of the wall dominating the shear failure is influenced significantly by the aspect ratio, while the relatively slight influence from the axial stress can be neglected.

关 键 词：砌块整浇墙 剪切破坏 耗能 能量耗散系数 黏滞阻尼比 功比指数 

分 类 号：TU365[建筑科学—结构工程] P315.92[天文地球—地震学]