新型PEC柱-钢梁端板连接组合框架层间抗震机理试验研究

发布时间：2018-03-12 09:24

本文选题：新型PEC柱　切入点：外伸端板连接　出处：《四川大学学报(工程科学版)》2015年06期 　论文类型：期刊论文

【摘要】：为研究新型卷边PEC柱-钢梁外伸端板连接组合框架结构的层间抗震机理,按1∶2缩尺设计了1榀组合框架层间子结构模型试件并进行水平低周往复荷载试验。基于试验现象和测试数据,分析了试件结构的破坏过程与破坏模式、滞回特性、刚度退化、耗能能力、变形模式等抗震性能。结果表明:试件结构最终破坏模式为端板附近梁截面充分屈服形成塑性铰的理想塑性破坏机构;试件整体与层间位移延性系数μu=3.74和最大等效粘滞阻尼系数(ζeq)max=0.325,具有良好抗震延性和耗能能力;试件结构整体性好,水平抗侧刚度沿高度分布均匀,水平位移分布规律表现为理想的倒三角弯剪型变形模式;试件结构整体与层间侧移和节点转角均超过大震层间侧移限值的1/30,即试件结构具有良好的抗倒塌能力。
[Abstract]:In order to study the interstory aseismic mechanism of a new type of composite frame structure with PEC column and steel beam with outstretched end-plate connection, According to 1: 2 scale, a composite frame interstory substructure model specimen is designed and tested under horizontal low cycle reciprocating load. Based on the experimental phenomena and test data, the failure process and failure mode, hysteretic characteristics and stiffness degradation of the specimen structure are analyzed. The results show that the ultimate failure mode of the structure is an ideal plastic failure mechanism in which the beam section near the end plate is fully yielding to form plastic hinge. The ductility coefficient 渭 u (3.74) and the maximum equivalent viscous damping coefficient (味 eqlmax = 0.325) have good seismic ductility and energy dissipation ability, and the structural integrity of the specimen is good, and the horizontal lateral stiffness distributes uniformly along the height. The horizontal displacement distribution is shown as an ideal inverted triangle bending shear deformation model, and the whole and interstory lateral displacement and the node rotation angle of the specimen structure are more than 1 / 30 of the limit of the lateral displacement between the layers of a large earthquake, that is, the specimen structure has a good ability to resist collapse.
【作者单位】：苏州科技学院江苏省结构重点实验室;
【基金】：国家自然科学基金资助项目(51078247;51478286) 江苏省“青蓝工程”中青年学术带头人资助项目(2014) 江苏省高校首批优秀中青年教师出国研修计划项目资助(2011)
【分类号】：TU398.9;TU352.11

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