RPC剪力墙非线性分析及轴压比限值研究

中文摘要: 对3片活性粉末混凝土RPC（reactive powder concrete）剪力墙进行了低周反复荷载试验，考察了往复荷载作用下RPC剪力墙的破坏形态、承载力、滞回特性、延性、耗能能力等。基于试验，采用有限元程序OpenSees，选用分层壳单元模型，建立RPC剪力墙非线性模型，数值模拟加载全过程和受力性能，模拟滞回曲线与试验滞回曲线吻合较好。采用试验和数值模拟相结合的方法，重点分析轴压比对RPC剪力墙延性性能的影响，以位移延性系数不小于3为目标，给出了轴压比限值的建议。
Abstract:Based on quasi-static tests of 3 reactive powder concrete shear walls,the failure mode,bearing capacity,hysteretic loops,and characteristic of energy dissipation of RPC shear wall were investigated.Using the finite element software OpenSees and multi-layer shell element,the nonlinear analysis was performed to simulate the complete loading and mechanical behavior.Experimental results were simulated.By combining the experimental research and the numerical simulation,the influence of axial load ratio on the ductility was studied,and the allowable axial load ratio of RPC shear wall was investigated aiming at the ductility factor not less than 3.