钢管混凝土边框内藏钢板组合剪力墙正截面受弯性能分析  

Analysis of normal section flexural behavior of composite shear walls with CFST boundary columns and embedded steel plates

作　　者：曹万林[1] 许方方[1] 董宏英[1] 张文江[1] 

机构地区：[1]北京工业大学建筑工程学院,北京100124

出　　处：《世界地震工程》2013年第1期8-14,共7页World Earthquake Engineering

基　　金：国家自然科技基金(50978005);国家"十二五"科技支撑计划课题(2012BAJ13B02)

摘　　要：提出了钢管混凝土边框内藏钢板的组合剪力墙,进行了模型抗震性能试验,表明其抗震性能良好。为进一步分析该组合剪力墙的受力特点,基于试验研究,引入了平截面假定,提出了正截面受弯承载力简化计算模型,给出了用条带法计算受弯承载力的公式并编制了计算程序。计算分析了钢管壁厚、内藏钢板厚度、混凝土强度等级对剪力墙受弯承载力的影响,计算结果与实测值符合较好。研究表明:增大钢管壁厚,剪力墙抗弯承载力明显提高;增大内藏钢板厚度,剪力墙承载力提高,但比增大钢管壁厚提高的效率低;混凝土强度等级提高,剪力墙抗弯承载力有一定的提高,但提高幅度随着边框钢管壁厚增大而减小;钢管壁厚、内藏钢板厚度、墙体截面厚度、混凝土强度应合理匹配,以充分发挥该组合剪力墙的抗震效能。A composite shear wall with concrete filled steel tube （CFST） boundary columns and embedded steel plates was proposed. The test shows it has good seismic behavior. In order to investigate its stress characteristic, the plane cross-section assumption was introduced based on the test study. The simplified calculation model for the normal section flexural load-bearing capacity was put forward. The formulae of stripe method were given and the corresponding calculation program was complied. The effect of the thickness of steel tube, thickness of the embedded steel plate and the concrete strength on the flexural load-bearing capacity was discussed. The calculated results are in good agreement with the test results. Results show that： the flexural load-bearing capacity is improved greatly with the increasing of the thickness of steel tube; the load-bearing capacity is improved with the increasing of the thickness of steel plate, but it has lower efficiency than increasing the thickness of steel tube; the flexural load-bearing capacity is improved marginally with the increasing of concrete strength, but the increasing amplitude decreases with the increasing of steel tube thickness; the parameters, such as the thickness of steel tube, thickness of embedded steel plate, the thickness of wall and concrete strength, should be set optimally so as to give full play to the seismic efficiency of composite shear wall.

关 键 词：钢管混凝土 内藏钢板 组合剪力墙 受弯性能 计算分析 

分 类 号：TU398[建筑科学—结构工程]