薄壁钢管灌芯混凝土剪力墙抗震性能分析

Seismic performance analysis of core-grouted assembled thin-walled steel tube-reinforced concrete composite shear wall

本文为研究薄壁钢管灌芯混凝土剪力墙的抗震性能,针对剪跨比为2.36的剪力墙试件进行数值模拟,对比分析常规钢筋混凝土剪力墙与薄壁灌芯钢管剪力墙试件在破坏形态、滞回性能、延性及刚度等几个方面的差别.通过对两种剪力墙模型的数值分析可以发现,薄壁钢管灌芯混凝土剪力墙试件在受力的初始阶段刚度好,具有很好的承载性能,在往复荷载的作用下承载性能和刚度均降低的较为缓慢,得到的滞回曲线成梭形,在建筑系统中可以发挥与普通混凝土剪力墙相同的受力性能.

The seismic performance of core-grouted assembled thin-walled steel tube-reinforced concrete composite shear wall is studied by means of numerical simulation in this paper.The shear walls of ordinary reinforced concrete and core-grouted assembled thin-walled steel tube-reinforced concrete composite shear wall with same ratio of shear span to effective depth of 2.36 have been investigated.The difference between the failure mode,hysteresis characteristics,ductility and stiffness of them have been compared.It is shown that the later one has high initial stiffness and high bearing capacity based on the results of finite element analysis.The degradation of bearing capacity and stiffness of that is slow during the loading process and the hysteretic curves is full under low cyclic loading.Core-grouted assembled thin-walled steel tube-reinforced concrete composite shear wall shows excellent seismic performance.It could play the same effect as ordinary concrete shear wall in the system.