钢管煤矸石混凝土压弯构件的有限元分析  

Finite Element Analysis of Gangue Concrete-Filled Steel Tubular Beam-Columns

作　　者：李帼昌[1] 舒铮[1] 张春雨[1] 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2010年第6期1052-1057,共6页Journal of Shenyang Jianzhu University：Natural Science

基　　金：住房和城乡建设部科技攻关项目(2008-k2-26);辽宁省高等学校科学研究项目(2008583)

摘　　要：目的为研究钢管煤矸石混凝土构件在压弯变形时的动力性能,建立钢管煤矸石混凝土压弯构件在往复荷载作用下的模型建立方法,进一步完善轴压比对荷载-位移滞回曲线的影响规律的研究.方法采用有限元分析软件ABAQUS对在往复荷载作用下的钢管煤矸石混凝土压弯构件进行模拟,通过计算得到荷载-位移滞回曲线并与实验数据进行对比.结果计算得到的滞回曲线与实验数据吻合良好,滞回曲线呈饱满的纺锤形,表现出了良好的耗能性能和延性,说明核心煤矸石混凝土与钢管协同互补、共同工作,保证了材料性能的充分发挥,抗震性能良好.结论提出的模型建立方法可以较好地模拟往复荷载作用下的钢管煤矸石混凝土压弯构件;轴压比对构件的承载力和延性影响较大;当水平位移较小时(Δ/Δy<3)钢管煤矸石混凝土压弯构件刚度退化现象十分明显,位移继续增大,刚度退化现象会逐渐趋于平缓.In this paper,the influence of axial compression ratio on the load-displacement hysteretic curve is investigated.The purpose is to analyze the hysteretic behavior and the ductility of gangue concrete-filled steel tube and establish proper material constitutive models for gangue concrete-filled tubular beam-columns by the nonlinear finite element program ABAQUS against experimental data.The finite element program ABAQUS was used to simulate the gangue concrete filled steel tube subjected to cyclic loading.The results of the numerical simulation are presented and verified against the experimental data.Generally,the numerical results show very good agreement with the experimental data.And the curves are full spindle-shaped showing a good dissipation energy performance and hysteresis behavior.It indicates that the gangue concrete and the steel work together complementarily and make full use of each other＇s property.The results in this study demonstrate that the finite element model for GCFT proposed in the paper is proper and feasible.The axial compression ratio significantly influences ultimate strength and ductility.The stiffness-degrading phenomenon is obvious when the horizontal displacement is small（Δ/Δy 3）.However,the stiffness-degrading rate decreases with the increase of axial compression ratio.

关 键 词：钢管 煤矸石混凝土 滞回曲线 反复加载 延性 

分 类 号：TU398[建筑科学—结构工程]