带开槽耗能板的自复位方钢管混凝土柱-钢梁节点抗震性能试验研究  

EXPERIMENTAL STUDY ON SEISMIC BEHAVIOR OF SELF-CENTERING CONCRETE-FILLED SQUARE STEEL TUBULAR COLUMN-STEEL BEAM JOINTS WITH SLOTTED ENERGY DISSIPATION PLATES

作　　者：王先铁[1] 贾子涵 谢川东 郭艺伟 WANG Xian-tie;JIA Zi-han;XIE Chuan-dong;GUO Yi-wei(School of Civil Engineering,Xi’an University of Architecture&Technology,Xi’an,Shaanxi 710055,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《工程力学》2022年第9期110-122,共13页Engineering Mechanics

基　　金：国家自然科学基金项目(51678474);陕西省自然科学基金项目(2022JM-189)。

摘　　要：针对自复位节点复位阶段抗力大的问题,提出了带开槽耗能板的自复位方钢管混凝土柱-钢梁节点。为研究节点的抗震性能和自复位性能,对5个足尺梁柱节点试件进行低周往复荷载试验,对其受力性能进行理论分析,建立节点的恢复力模型。结果表明:带开槽耗能板的自复位节点具有良好的耗能能力、承载能力和自复位性能,滞回曲线呈典型的“双旗帜”形。4.00%位移角时节点残余变形较小,除耗能板外其余部件均保持弹性,震后更换耗能板即可快速修复。节点的自复位性能随耗能板单个板条宽度的增大而降低,耗能能力随单个板条宽度的增大而提高;耗能板厚度和宽度越大,节点的耗能能力和承载力越强,自复位能力越弱;钢绞线初始预应力对节点的承载力、初始刚度和自复位能力均有显著影响,但对节点耗能能力影响很小。恢复力模型与试验结果吻合较好。In order to reduce the unloading resistance,a self-centering(SC) concrete-filled square steel tubular column and steel beam joint with slotted energy dissipation plates was designed.Low cyclic reversed loading tests of five full-scale joints were conducted to study the aseismic behavior.The mechanical properties were analyzed and the restoring force model was established.The results show that the self-centering joint with slotted energy dissipation plates has good bearing capacity,self-centering capacity and energy dissipation with the "double flag" shape hysteresis curve.The residual deformation is small under 4.00% drift,and the components remain elastic except energy dissipation plates which can be quickly repaired by replacing the plates.The wider the individual slat,the weaker the self-centering ability and the stronger the energy dissipation capability.The larger the width and thickness of the plates,the stronger the bearing and energy dissipation capacity,but the self-centering ability becomes weaker.The prestress of strands has significant influence on the initial stiffness,bearing capacity and self-centering ability,but has little influence on energy dissipation.The restoring force model agrees well with the experimental results.

关 键 词：自复位 梁柱节点 开槽耗能板 抗震性能 低周往复荷载试验 恢复力模型 

分 类 号：TU352.1[建筑科学—结构工程]