方钢管混凝土柱-钢梁节点的非线性有限元分析  

Nonlinear FEM analysis of bearing capacity behavior of concrete-filled square tubular column and steel beam joints

作　　者：周天华[1] 郭彦利[1] 卢林枫[1] 何保康[2] 

机构地区：[1]长安大学建筑工程学院,陕西西安710061 [2]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《西安科技大学学报》2005年第3期283-287,316,共6页Journal of Xi’an University of Science and Technology

基　　金：2005年国家技术创新重点专项计划资助;陕西省自然科学基金(2004E205)

摘　　要：利用三维实体单元,对“带内隔板方钢管混凝土柱-钢梁节点”建立了同时考虑几何非线性、高强螺栓连接的面—面接触非线性、各种材料非线性等因素的有限元理论分析模型,模拟分析了单调加载和低周反复加载时节点的受力性能,较为精确地分析了节点区应力分布和混凝土开裂情况,以弥补试验中无法直观地了解各细部受力情况和改变各种参数进行对比的缺陷;考察了轴压比大小、混凝土强度等因素对节点受力性能的影响,根据理论与试验结果分析,提出了设计和改进建议。The nonlinear FEM models of concrete-filled square tubular column and steel beam joints involving geometric large deformation, contact-friction of high-strength bolts and materials nonlinear is presented. The 3D models of beam-to-column connections with internal diaphragms by 3D solid elements are founded. And the bearing capacity behavior of connections under the monotonic loading and cyclic loading are analyzed. The results of nonlinear FEM analysis show the stresses distribution in the joints better, so that it provides the possibility to patch up the defects that couldn＇t observe in detail in experiments. And then, various factors of the influences of joints capacity behavior can be analyzed such as changing axial compression force ratio and concrete strength etc. Finally, some suggestions for improving joint design are presented according to comparison of theoretic analysis with that of experimental results.

关 键 词：方钢管混凝土柱 梁柱节点 受力性能 非线性有限元 

分 类 号：TU398[建筑科学—结构工程]