活性粉末混凝土剪力墙抗震性能试验研究  

Experimental study on seismic behavior of reactive powder concrete shear walls

作　　者：童小龙[1,2] 方志[1] 罗肖[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082 [2]湖南理工学院土木建筑学院,湖南岳阳414006

出　　处：《建筑结构学报》2016年第1期21-30,共10页Journal of Building Structures

基　　金：国家自然科学基金项目(51078134)

摘　　要：为研究活性粉末混凝土剪力墙的抗震性能,对3个高宽比分别为1.0、1.5和2.0的剪力墙进行拟静力试验,分析了高宽比变化对活性粉末混凝土剪力墙破坏形态、承载力、滞回曲线、延性、耗能能力和刚度退化的影响规律。结果表明:活性粉末混凝土剪力墙承载力高,破坏形态与普通混凝土和高性能混凝土剪力墙基本相似,但裂缝分布范围更广,裂缝数量更多、更密集,高宽比对其破坏形态影响较大,墙体高宽比从1.0增大至2.0,极限位移增大2.8倍,耗能量提高3.9倍,高宽比为2.0的剪力墙延性系数大于3。采用Open Sees程序,选用分层壳单元模型对试件受力性能进行了数值模拟和参数分析。分析表明:分层壳单元模型能够较准确地模拟活性粉末混凝土剪力墙的抗震性能,高宽比和轴压比对活性粉末混凝土剪力墙承载力及极限位移影响显著,暗柱纵筋配筋率对其承载力影响较大,墙面分布钢筋对其承载力和极限位移影响较小。With quasi-static test, the seismic behavior of three reactive powder concrete （RPC） shear walls （ height- to-width ratios were 1.0, 1.5 and 2. 0） was studied. The effects of height-to-width ratio on the seismic behavior such as failure mode, bearing capacity, hysteretic loops, ductility, characteristic of energy dissipation and rigidity degradation were studied. The experimental research shows that the bearing capacity of RPC shear wall is high and the failure mode of RPC shear walls is similar to normal and high-performance concrete shear walls, but cracks are more widely distributed with larger number and density. The height-to-width ratio has great influence on RPC shear walls, with the increasing of height-to-width ratio form 1.0 to 2.0, the ultimate displacement increases 2.8 times and energy dissipation increases 3.9 times and when the height-to-width ratio is 2. 0, the ductility factor is higher than 3. Based on OpenSees program, experimental results were well simulated and analyzed using multi-layer shell element model, and the parameters of RPC shear wall were discussed. The analysis shows that the height-to-width ratio and axial compression ratio have great influence on the bearing capacity and the ultimate displacement, the reinforcement ratio of the hidden column has great influence on the bearing capacity and the reinforcement ratio of the distribution bars has a little influence on the bearing capacity and the ultimate displacement.

关 键 词：活性粉末混凝土剪力墙 高宽比 拟静力试验 有限元分析 抗震性能 

分 类 号：TU375[建筑科学—结构工程] TU528.2