基于ABAQUS梁单元的钢筋混凝土框架结构数值模拟  

Numerical Simulation of a RC Frame Based on ABAQUS Beam Elements

作　　者：高向玲[1] 张业树 李杰[1] 

机构地区：[1]同济大学建筑工程系,上海200092

出　　处：《结构工程师》2013年第6期19-26,共8页Structural Engineers

基　　金："十二.五"科技支撑计划项目(2011BAJ09B03-02);国家自然科学基金委国际合作项目(51261120374)

摘　　要：以三层两跨的钢筋混凝土平面框架结构的非线性受力全过程试验研究为背景,通过材性试验标定了混凝土和钢筋的材料参数,应用ABAQUS对钢筋混凝土框架进行有限元建模并对其进行数值模拟。在数值模拟中,框架结构采用梁单元建模。混凝土的受拉本构关系考虑受拉刚化效应,混凝土的受压本构关系考虑箍筋对混凝土的约束作用将素混凝土本构关系修正为约束混凝土本构关系。混凝土的本构关系分别采用ABAQUS自带的损伤塑性模型(CDP)、《混凝土结构设计规范》(GB 50010—2010)推荐的本构关系。其中,规范推荐的本构关系采用两组参数,分别为根据材性试验测定的参数和规范推荐的参数,并分别将三者模拟的结果与试验结果进行了对比,表明采用经过参数标定的损伤塑性模型能够较好地模拟框架结构的受力行为。在缺乏试验的情况下,直接采用我国规范建议的混凝土本构关系,亦可较好地进行混凝土框架结构的数值模拟分析。Based on the experimental study of a reinforced concrete frame structure with three storeys and two spans to calibrate the mechanical performance of concrete and reinforcing steel,12 prismatic specimens were tested and 6 for tensile tests and the other for compressive tests.The software ABAQUS was used to simulate the RC frame.In the numerical simulation,the beam element was applied to simulate the frame.Meanwhile,the tension stiffening effect and the influence of stirrup of concrete was taken into account and the constitutive relationship of plain concrete was modified to simulate the real state.In order to understand the effect of the concrete constitutive relationship on the analysis of the entire structure,two types of concrete constitutive relationships were adopted.One is the concrete damaged plasticity model （CDP） in ABAQUS and the other is the constitutive model recommended by China Concrete Structure Design Code （GB 50010-2010）.For the constitutive model recommended by the Code,two groups of parameters were used.One is determined by the concrete specimen test and the other is according to the code suggestion.The calculated results of the RC frame structure adopted three types of concrete constitutive models were compared with the experimental results and they are in agreement with each other.

关 键 词：混凝土框架结构 ABAQUS 梁单元 受拉刚化 箍筋约束 数值模拟 

分 类 号：TU375.4[建筑科学—结构工程]