钢管混凝土边框带斜筋柱式配筋剪力墙地震损伤试验研究

为研究钢管混凝土边框带斜筋柱式配筋剪力墙的地震损伤规律,设计、制作了4片不同构造形式的剪力墙试件,进行了低周反复加载试验,并分析了试件地震损伤演化过程;对各试件进行基于能量法的地震损伤分析,研究了钢管混凝土边框和带斜筋柱式配筋形式对试件地震损伤的影响。结果表明:钢管混凝土边框和带斜筋柱式配筋的构造组合显著减小了试件地震损伤指数,提高了试件抗震性能,其中柱式配筋形式可以大幅提高试件延性性能,斜筋能够加强试件抗侧刚度,钢管混凝土边框在加载后期可以为试件提供良好的承载力、刚度和变形储备;所建立的地震损伤评定模型,较好地体现了钢管混凝土边框带斜筋柱式配筋剪力墙损伤指数与试验损伤形态之间的关系。

Seismic damage experimental research on shear wall of concrete-filled steel tube boundary and column-type reinforcement with oblique steel bars

In order to study the seismic damage of shear wall of concrete-filled steel tube boundary and column-type reinforcement with oblique steel bars, four pieces of shear wall specimens with different structures were designed and manufactured, and the low cycle reversed load experiment was performed and seismic damage evolution process were analyzed. Seismic damage analysis was performed with the method of energy, and the mechanism of the seismic damage of concrete-filled steel tube boundary and column-type reinforcement with oblique steel bars were studied. The results show that the combination of the concrete-filled steel tube boundary and column-type reinforcement with oblique steel bars have significantly improve the seismic performance of the specimens, the form of column reinforcement could greatly improve the ductility performance of the specimens, the oblique steel bars can strengthen the lateral stiffness of the specimens, the concrete-filled steel tube boundary can provide good load-bearing, stiffness and deformation capacity for the specimen in the later stage of loading. The seismic damage assessment model can well reflect the relationship between the damage index and the experimental damage pattern of shear wall of concrete-filled steel tube boundary and column-type reinforcement with oblique steel bars.