新型卷边PEC柱-钢梁摩擦耗能T形件连接组合框架抗震性能数值模拟

发布时间：2018-03-30 10:57

本文选题：新型卷边PEC柱　切入点：组合框架　出处：《武汉理工大学学报》2016年10期

【摘要】：针对1榀两层单跨新型卷边PEC柱-钢梁摩擦耗能T形件连接组合框架子结构试验试件,采用有限元商业软件ABAQUS对其在拟静力荷载下的抗震性能进行数值模拟。基于模拟结果,分析试件结构滞回特征、水平抗侧刚度、节点连接力学性能、耗能机理、层间传力模式和破坏机构等抗震性能。结果显示:试件具有较高的承载能力和较大的水平抗侧刚度,且上下层初水平抗侧刚度差异随着加载的进行而逐渐趋向一致;试件主要通过摩擦、PEC柱脚混凝土压溃与钢构架屈服和T形件端部截面屈服耗能,且各层耗能较为均匀,试件结构较好实现了"小震利用摩擦耗能、中大震通过结构主体构件屈服耗能"的性态设计目标;试件层间水平剪力由PEC柱平均承担,且侧移表现为剪切型变形模式;试件结构破坏机构为摩擦耗能T形件端部梁截面和PEC柱脚处形成塑性铰的塑性破坏机构,试件结构具有良好的抗震延性。
[Abstract]:Based on the experimental results of a new two-story single-span PEC column steel beam with friction energy dissipation T-joint frame frame structure, the seismic behavior of the composite frame frame under pseudo-static load was simulated by using the commercial finite element software ABAQUS. The structural hysteretic characteristics, horizontal lateral stiffness, mechanical properties of joint connection, energy dissipation mechanism, interstory force transfer mode and failure mechanism are analyzed. The results show that the specimen has higher bearing capacity and higher horizontal lateral stiffness. The initial horizontal lateral stiffness difference of the upper and lower layers tends to be consistent with the loading, and the energy consumption of each layer is more uniform through the concrete crashing of PEC column foot and the yield of steel frame and the yield of the end section of T-shaped part, and the energy consumption of each layer is more uniform. The design goal of "small earthquake energy dissipation by friction, medium and large earthquake yield energy dissipation through the main structural member" is well realized, and the horizontal shear force between the layers of the specimen is borne by the PEC column on average, and the lateral displacement shows a shear deformation mode. The failure mechanism of the specimen structure is the plastic hinge formed at the end beam section of the friction energy-dissipation T-shaped part and the base of the PEC column, and the structure has good seismic ductility.
【作者单位】：苏州科技大学土木工程学院;
【基金】：国家自然科学基金(51478286,51078247) 江苏省“青蓝工程”中青年学术带头人江苏省“六大人才高峰”(2016)资助项目
【分类号】：TU352.11;TU398.9

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