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

发布时间：2018-01-06 15:42

本文关键词：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　出处：《工程力学》2015年02期 　论文类型：期刊论文

【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。
[Abstract]:To study the wear bolt end plate joints of concrete filled square steel tubular frame seismic performance, a two storey two span concrete filled square steel tubular frame by pseudo static test based on the research results, using the finite element software ABAQUS to test for the nonlinear numerical analysis. The ductile failure mechanism, research frame, the performance of energy dissipation capacity and node. At peak load, the numerical results are in good agreement with the experimental results. The axial compression ratio, the node plate thickness, stiffener thickness and bolt are analyzed. The results show that the framework of full hysteretic curve and has good ductility and energy dissipation capacity of the node does not produce plastic the deformation during the loading process. When the frame columns is small, the failure mechanism of the beam hinge can be formed. Increasing the thickness of end plate and beam end setting stiffener can improve the stiffness and bearing capacity of the structure, the frame The stiffness degradation tends to be slow. The pretension of high strength bolt has no significant effect on the performance of the frame.

【作者单位】：西安建筑科技大学土木工程学院;五邑大学土木与建筑学院;
【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)
【分类号】：TU398.9
【正文快照】： 随着高层、超高层建筑的不断增多,钢管混凝土结构逐渐得到广泛的应用[1]。钢管混凝土承载力高,延性好,施工方便,具有良好的经济性。近年来国内外专家学者对钢管混凝土的研究已由构件、节点性能转向对钢管混凝土结构整体性能的分析。Herrera等[2]对一榀采用T型连接节点的4层4跨

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