基于损伤的型钢混凝土构件数值分析  

DAMAGE-BASED NUMERICAL ANALYSIS OF STEEL REINFORCED CONCRETE MEMBERS

作　　者：王斌[1] 郑山锁[1] 李磊[1] 

机构地区：[1]西安建筑科技大学土木工程学院,西安710055

出　　处：《工程力学》2011年第5期124-128,154,共6页Engineering Mechanics

基　　金：国家自然科学基金重大研究计划培育项目(90815005);国家自然科学基金面上项目(50978218)

摘　　要：为了对型钢混凝土构件进行精细化建模分析,首先建立了仅依靠材料参数的混凝土本构关系以及损伤演化方程,根据型钢应变的发展以及屈曲影响,得到了型钢损伤本构模型。通过对型钢与混凝土粘结-滑移机理的进一步分析,进而建立了一种同时考虑粘结损伤和力学损伤的型钢与混凝土界面损伤模型,以合理考虑粘结-滑移对构件力学性能的影响。最后,对型钢混凝土框架柱试件进行了数值分析,通过与低周反复荷载作用下型钢混凝土框架柱试验所得滞回曲线的对比,发现该数值模拟计算结果较为精确,同时所提出的材料损伤模型较好地反映地震作用下型钢混凝土构件力学特性的变化。研究结果可为型钢混凝土结构地震作用下的非线性分析提供理论参考。The newly proposed constitutive and damage evolution laws of concrete depending only on material parameters is obtained.The damage constitutive law for steel by taking into account the plastic train development and buckling effect of steel is established for the accurate numerical model of steel reinforced concrete（SRC） members.The bond-slip relationship between steel and concrete is analyzed.An interfacial damage model is established to consider the effect of bond-slip on the mechanical character of members by combining bond and mechanical damages.Finally,SRC frame column specimens were analyzed by the finite element method under low cycle reversal loading.Compared with the experimental hysteresis curves,the computational results are found to be accurate.The material damage model inhere established can well reflect the change of mechanical character of SRC members,and supply a theoretical reference for the nonlinear numerical analysis of SRC structures under earthquakes.

关 键 词：混凝土损伤 型钢损伤 粘结损伤 型钢混凝土框架柱 数值分析 

分 类 号：TU398.9[建筑科学—结构工程]