箱型钢梁-柱新型连接节点抗震性能  

Seismic performance of a novel connection joint between box⁃shaped steel beam and column

作　　者：史雨安 徐若瀚 李平昌 李正荣 崔凯禹 刘纲[1] 梁宇佳 SHI Yu’an;XU Ruohan;LI Pingchang;LI Zhengrong;CUI Kaiyu;LIU Gang;LIANG Yujia(College of Civil Engineering,Chongqing University,Chongqing 400045,China;School of Architecture and Civil Engineering,Chengdu University,Chengdu 610106,China;Panzhihua Steel Research Institute Co.,Ltd.,Pangang Group,Panzhihua 617000,China;Southwest Company of China Construction Eighth Bureau,Chengdu 610000,China)

机构地区：[1]重庆大学土木工程学院,重庆400045 [2]成都大学建筑与土木工程学院,成都610106 [3]攀钢集团攀枝花钢铁研究院有限公司,攀枝花617000 [4]中建八局西南分公司,成都610000

出　　处：《东南大学学报(自然科学版)》2025年第2期395-402,共8页Journal of Southeast University:Natural Science Edition

基　　金：国家自然科学基金资助项目(52078084).

摘　　要：针对装配式箱型钢梁-柱的连接问题,提出了一种盖板箱型槽孔削弱装配式新型节点。通过2个足尺模型试验,分析该新型节点的破坏机理与抗震性能,并用试验结果检验有限元模型的有效性。在此基础上,分析了节点的不同参数对其抗震性能的影响。研究表明:提出的新型节点具有较好的抗震性能;塑性铰出现在槽孔削弱处,防止了脆性破坏;槽孔长度变化对节点抗震性能影响较小,但当槽孔向柱端靠近或槽孔宽度扩大时,均会造成节点的承载能力和耗能性能降低。因此,建议将槽孔削弱区设置在距离盖板较远的位置,并尽可能缩减槽孔的长度和宽度;盖板厚度变化主要影响节点的刚度与总耗能,提高盖板厚度均会使总耗能增长,建议将加强盖板设置为短厚型。To solve the connection issue of assembled box-shaped steel beams and columns,a novel assembled box-shaped joint type with a reinforced cover plate and weakened slot was introduced.Through two full-scale model tests,the failure mechanism and seismic performance of the new joint were analyzed.The experimental results were used to validate the effectiveness of the finite element model.Based on this,the influence of different parameters of the nodes on their seismic performance was analyzed.The research indicates that the innovative joint design demonstrates strong seismic performance.The plastic hinge appears at the weakened slot,effectively preventing brittle failure.Variations in the length of the slot have minimal impact on the seismic performance of the joint.However,positioning the slot closer to the column end or increasing the width of the slot both lead to decreased load-bearing capacity and energy dissipation of the joint.Therefore,it is recommended to position the weakened slot area farther from the cover plate and minimize the length and width of the weakened slot.Changes in the thickness of cover plate primarily affect the stiffness and overall energy dissipation of the joint.Increasing its thickness results in higher energy dissipation.Therefore,it is suggested to use the short and thickened strengthening cover plate.

关 键 词：装配式钢结构 箱型节点 抗震性能 拟静力试验 数值模拟 参数分析 

分 类 号：TU391[建筑科学—结构工程] TU317.1