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中文摘要：
为精细化模拟钢筋混凝土结构的非线性滞回性能,建立了钢筋混凝土纤维梁柱单元的一种实用模拟平台FENAP,开发了相应的具有钢和混凝土多种单轴本构模型的材料库。FENAP平台可考虑构件刚度和强度退化等损伤效应、轴力和弯矩的多维耦合效应以及箍筋对混凝土的约束效应。分别运用FENAP平台和OpenSees软件模拟了圆形钢墩柱和矩形钢筋混凝土悬臂梁在反复加载下的滞回性能,并对两者的模拟结果进行了比较分析。结果表明,利用该文所建立的FENAP平台可精细模拟桥梁构件的复杂非线性行为,且计算效率和求解精度高,从而为长大桥梁地震灾变过程模拟提供了实用的分析手段。
英文摘要：
In order to simulate the nonlinear hysteretic behavior of a RC structure refinedly,a practical simulation platform FENAP for a reinforced concrete（RC） fiber beam-column element is established,and the corresponding material library with multiple uniaxial constitutive models of steel and concrete is developed.In the platform FENAP,the damage effect of stiffness and strength degradation of members,the multi-dimensional coupling effect of axial forces and bending moments,and the binding effect of stirrups on concrete may be considered effectively.Hysteretic behaviors of a circular steel pier and a rectangular RC cantilever beam are simulated using the platform FENAP and the software OpenSees respectively,and the simulated results are compared and analyzed.The results show that the complex nonlinear behavior of bridge components may be simulated refinedly with high computational efficiency and solution accuracy using the built platform FENAP,which provides a practical analysis tool to simulate the disaster evolution process of large bridges.
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