【作者】 侯皓文； 王伟； 陈越时；

【Author】 HOU Hao-wen;WANG Wei;CHEN Yue-shi;State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University;China Construction Eighth Engineering Division Co., Ltd;

【机构】 同济大学土木工程防灾国家重点实验室； 中国建筑第八工程局有限公司；

【摘要】 为解决双钢板混凝土组合剪力墙与钢梁难以实现现场免焊装配化连接的问题,提出了一种采用分体垫片式单边螺栓端板连接的装配式节点构造,设计并制作了两个足尺试件进行低周往复加载试验及有限元分析,研究了连接节点的变形机理、破坏形态、承载能力、延性、耗能能力以及刚度退化性能。研究结果表明:根据节点区竖放H型钢翼缘厚度不同,节点破坏模式可分为梁端塑性铰破坏和柱壁破坏;发生梁端塑性铰破坏的节点滞回曲线呈饱满的梭形,表现出良好的抗震性能,柱壁及节点区内填混凝土基本保持完好;发生柱壁破坏的节点表现为螺栓孔周钢板受拉形成圆形屈服面,内填混凝土压溃,承载力较低且刚度退化严重,耗能能力较差,加载后期节点的转角主要源于节点区的转动,该失效模式在设计中应予以避免。更多还原

【Abstract】 In order to solve the problem of prefabricated construction between H-shaped steel beams and double-skin composite walls, an assembled endplate joint using slip-critical blind bolts(SCBBs) was proposed in this paper. Two full-scaled specimens were designed and fabricated for low cycle reciprocating loading test and FEM analysis. The deformation mechanism, failure modes, ultimate capacity, ductility, energy dissipation, and stiffness degradation of the joints were studied. The results indicate that the failure modes can be divided into beam buckling and column surface damage according to the different thickness of vertical H-beam flange. The hysteretic curve of beam buckling joint shows full spindle shape, and the joint shows fine seismic performance with the column surface and infilled concrete approximately remain undamaged. As for the column surface damaged joint, circular yield surface formed on the steel plate under tension around the bolt hole, the infilled concrete was crushed. The beam-end rotation of the joint is mainly caused by the rotation of the joint area. This failure mode should be avoided in engineering design due to its low bearing capacity, serious stiffness degradation and poor energy dissipation capacity.更多还原