穿芯高强螺栓-端板节点方钢管混凝土框架抗震性能数值分析  

NUMERICAL ANALYSIS OF THE SEISMIC BEHAVIOR OF A SQUARE CONCRETE-FILLED STEEL TUBE FRAME WITH THROUGH BOLT-END PLATE JOINTS

作　　者：马尤苏夫 王先铁[1] 周清汉 王连坤[2] 

机构地区：[1]西安建筑科技大学土木工程学院,西安710055 [2]五邑大学土木与建筑学院,江门529020

出　　处：《工程力学》2015年第2期154-162,共9页Engineering Mechanics

基　　金：国家自然科学基金项目(51108369;5120838);教育部博士点新教师基金项目(20116120120008);陕西省科技新星科研项目(2013KJXX-54)

摘　　要：为研究采用穿芯高强螺栓-端板节点的方钢管混凝土框架的抗震性能,基于一榀两层两跨方钢管混凝土框架的拟静力试验研究结果,利用有限元软件ABAQUS对试验试件进行了非线性数值分析。研究框架的破坏机制、延性、耗能能力及节点性能。在峰值荷载前,数值分析结果与试验结果吻合较好。对轴压比、节点端板厚度、加劲肋厚度以及高强螺栓预拉力等因素进行了分析。结果表明,框架滞回曲线饱满,具有良好的延性和耗能能力,节点在加载过程中未产生塑性变形。当框架柱的轴压比较小时,可形成理想的梁铰破坏机制。增大端板厚度和设置梁端加劲肋可提高结构的刚度与承载力,使框架刚度的退化趋于平缓。高强螺栓预拉力对框架性能无显著影响。This study is based on the experimental results of a two-story two-bay composite frame under cyclic loading, built to study the seismic behavior of square concrete-filled steel tube frame with through bolt-end plate joints. The nonlinear numerical analysis was conducted using the finite element software(FES) ABAQUS to analyze the failure mechanism, ductility, energy dissipation and connection behavior of this structure. Before maximum load, reasonable agreement was observed between the analysis results and experimental ones. Considering different parameters, including axial compression ratios, the thickness of end plates, beam stiffeners, and the pre-tension of high strength bolts, the mechanical performance of frames was investigated. The results show that the hysteresis curves of the frame are stable, and the frame has excellent ductility and energy dissipation capacity. The joints have no plastic deformation during the loading procedure. When the axial compression ratio is low, the failure mechanism of frame is acceptable. Increasing the thickness of the end plates and providing beam stiffeners increase the stiffness and ultimate load, and postpone the decrease of stiffness. The pre-tensioning of high strength bolts has no influence on the behavior of frame.

关 键 词：方钢管混凝土框架 穿芯高强螺栓-端板节点 非线性有限元分析 抗震性能 参数分析 

分 类 号：TU398.9[建筑科学—结构工程]