钢管高强混凝土剪力墙压弯性能试验研究

Experimental study on axial-flexural behavior of shear walls with steel tube-confined high performance concrete

为研究全截面配置钢管高强混凝土剪力墙的压弯性能,完成了8个钢管高强混凝土剪力墙试件在单调水平荷载作用下的压弯试验,研究各试件的破坏形态、刚度、承载力、变形能力和耗能能力。试验结果表明:剪力墙的破坏形态为弯曲破坏;与一般剪力墙相比,钢管高强混凝土剪力墙初始刚度大、承载力高,破坏时承载力和刚度退化较慢、延性好,可避免底部剪切滑移破坏,具有较好的抗震性能。利用ABAQUS有限元分析软件对钢管高强混凝土剪力墙进行非线性分析,对其受力机理作理论上的诠释。在试验和理论分析的基础上,提出了钢管高强混凝土剪力墙压弯承载力计算式,计算结果与试验结果吻合较好。

To study the axial-flexural behavior of shear walls with steel tube-confined high performance concrete （STCHPC） embedded in the whole section, compression bending tests on eight STCHPC shear wall specimens were conducted. Mechanical behavior such as failure pattern, displacement ductility, bearing capacity, stiffness degeneration and energy dissipation was investigated. The test results show that the mechanical behavior of the shear walls is significantly improved with embedded STCHPC. Then based on the experimental results, the nonlinear finite element analysis was carried out using ABAQUS program. Based on the test and FEA results, axial-flexural capacity formula for STCHPC walls was proposed, which is in good agreement with experimental results.