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应变率对混凝土材料的力学性能有着重要影响。该文在对2片剪力墙构件进行快速加载试验的基础上,在混凝土塑性损伤模型中引入应变率效应,建立了考虑应变率效应的塑性损伤模型。应用该模型对该文所描述的快速加载下的剪力墙构件以及在拟静力作用下的另外3个构件进行了有限元模拟,结果表明考虑应变率效应的混凝土塑性损伤模型较好地描述了钢筋混凝土剪力墙在快速加载下的非线性行为。最后,运用所建立的考虑应变率效应的混凝土塑性损伤模型对不同轴压比和加载速率下剪力墙构件的非线性性能进行了模拟与分析。
Strain rate has an important influence on the mechanical properties of concrete materials. Based on the rapid loading test of two shear wall members, the strain rate effect is introduced into the plastic damage model of concrete to establish the plastic damage model considering the strain rate effect. This model is used to simulate the shear wall components under rapid loading and the other three components under quasi-static loading. The results show that the plastic damage model considering the effect of strain rate is well described Nonlinear behavior of reinforced concrete shear walls under rapid loading. Finally, the nonlinear plastic behavior of shear wall members with different axial compression ratio and loading rate was simulated and analyzed by using the established plastic damage model of concrete considering strain rate effect.