钢筋混凝土纤维梁柱单元实用模拟平台  

A PRACTICAL SIMULATION PLATFORM OF REINFORCED CONCRETE FIBER BEAM-COLUMN ELEMENT

作　　者：禚一[1,2] 李忠献[1,2] 

机构地区：[1]天津大学建筑工程学院,天津300072 [2]滨海土木工程结构与安全教育部重点实验室,天津300072

出　　处：《工程力学》2011年第4期102-108,127,共8页Engineering Mechanics

基　　金：国家自然科学基金重大研究计划"重大工程的动力灾变"重点支持项目(90715032);国家自然科学基金重大国际合作项目(51021140003)

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。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.

关 键 词：钢筋混凝土 梁柱单元 纤维模型 非线性行为 滞回性能 约束效应 

分 类 号：TU313[建筑科学—结构工程]