薄钢板PEC柱-削弱截面钢梁框架层间抗震试验研究

发布时间：2018-07-06 12:16

本文选题：薄钢板组合截面PEC柱 + 削弱梁截面　；参考：《西南交通大学学报》2017年04期

【摘要】：为研究薄钢板组合PEC柱(强轴)-削弱截面钢梁组合框架的层间抗震性能,设计制作1榀组合框架中间层子结构1∶2缩尺试件并对其进行水平循环往复荷载抗震试验.基于试验现象和测试数据整理,得到了试件破坏模式与滞回特征曲线,并对试件水平抗侧刚度、耗能性能和变形模式等进行了分析.研究结果显示:采用梁端截面削弱方式可通过梁端塑性铰形成位置偏离节点区以满足"强节点"的抗震要求;试件整体与层间中间层位移延性系数分别大于4.05和4.81,对应等效粘滞阻尼比最大值分别为0.288和0.286;试件结构水平抗侧刚度沿高度均匀分布,侧移变形呈理想倒三角弯剪型侧移变形模式;试件结构破坏模式为梁端削弱截面充分屈服形成塑性铰的理想塑性破坏机构,且其承载力下降到极限承载力85%时,对应试件整体与层间侧移角分别为0.043 3 rad和0.039 4 rad,相应超过框架结构大震层间侧移限值0.035 0 rad,说明试件结构具有良好的抗震延性.
[Abstract]:In order to study the interstory seismic behavior of PEC column (strong axis) and steel beam composite frame with thin steel plate, a substructure of composite frame with intermediate story at 1:2 scale was designed and fabricated and tested by horizontal cyclic reciprocating load. Based on the experimental phenomena and test data, the failure mode and hysteretic characteristic curve were obtained, and the horizontal lateral stiffness, energy dissipation and deformation mode were analyzed. The results show that the beam ends can be formed by plastic hinges to deviate from the joint area to meet the seismic requirements of "strong joints". The displacement ductility coefficients of the whole specimen and the interlayer layer are greater than 4.05 and 4.81, respectively, corresponding to the maximum of equivalent viscous damping ratio of 0.288 and 0.286 respectively. The horizontal lateral stiffness of the specimen is uniformly distributed along the height. The lateral displacement and deformation show an ideal reverse triangular bending shear mode, and the failure mode of the specimen structure is an ideal plastic failure mechanism where the beam end weakens the section to yield fully to form a plastic hinge, and its bearing capacity decreases to 85% of the ultimate bearing capacity. The overall and interstory lateral displacement angles of the specimens are 0.043 3 rad and 0.039 4 radrespectively, which exceed the limit of 0.035 rads for the lateral displacement between the layers of the frame structures, which indicates that the tested structures have good seismic ductility.
【作者单位】：苏州科技大学江苏省结构重点实验室;苏州建筑设计研究院有限公司;
【基金】：国家自然科学基金面上基金资助项目(51478286,51078247) 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资助项目(2011)
【分类号】：TU352.11

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