分离式型钢混凝土巨柱-钢梁节点力学性能试验研究及有限元分析  

Experimental study and infinite element analysis on mechanical behavior of separated steel⁃reinforced concrete mega column⁃steel beam joints

作　　者：孙飞飞[1] 曾繁良 包联进[3] 李国强[1] 周树青 李建峰[2] SUN Feifei;ZENG Fanliang;BAO Lianjin;LI Guoqiang;ZHOU Shuqing;LI Jianfeng(College of Civil Engineering,Tongji University,Shanghai 200092,China;South China Company,China Construction Second Engineering Bureau Co.,Ltd.,Shenzhen 518048,China;East China Architectural Design&Research Institute Co.,Ltd.,Shanghai 200002,China)

机构地区：[1]同济大学土木工程学院,上海200092 [2]中国建筑第二工程局有限公司华南分公司,深圳518048 [3]华东建筑设计研究院有限公司,上海200002

出　　处：《东南大学学报(自然科学版)》2025年第2期344-354,共11页Journal of Southeast University:Natural Science Edition

基　　金：国家自然科学基金资助项目(52378531).

摘　　要：为研究分离式型钢混凝土巨柱-钢梁节点的力学性能,针对实腹式及双型钢分离式节点试件进行了梁端低周往复加载及柱顶轴压加载,分析了试件的破坏形态、承载力、刚度、截面应变分布等特性。试验结果表明,试件首先发生梁端破坏,满足强节点弱构件条件,力学性能良好,型钢和混凝土之间能够保持协同工作。同时,以梁轴线夹角作为关键分析参数进行了有限元参数分析,探讨了梁轴线夹角变化后节点破坏机理的转变,并通过有限元模型研究了栓钉布置对试件承载力的影响。在试验及有限元分析结果的基础上,提出了针对分离式节点试件的强度校核公式,并进一步给出了承载力不满足要求时的补强措施。To investigate the mechanical behavior of separated steel‑reinforced concrete mega column‑steel beam joints,one traditional steel‑reinforced concrete joint and one separated steel‑reinforced concrete joint were tested,involving low‑cycle repeated loading at the beam end and axial compression loading at the column top.The failure mode,bearing capacity,stiffness,and strain distributions of specimens were analyzed.The test results indicate that the failure occurs at the beam end firstly,the“Strong Joint and Weak Member”criterion is satisfied,and the steel of the column can work together with concrete during the whole test.Meanwhile,finite element parameter analysis was conducted using the angle of the beam axis as a key parameter,exploring the transformation in the joint failure mechanism with changes in this angle.Using the finite element model,the influence of studs on the bearing capacity of specimens was also studied.Based on the results of the experiment and finite element analysis,the strength verification formula designed for separated steel‑reinforced concrete mega column‑steel beam joints was proposed,and reinforcement measures when the load‑bearing capacity requirements are not met are also proposed.

关 键 词：型钢混凝土节点 型钢分离 试验研究 有限元分析 

分 类 号：TU398.9[建筑科学—结构工程]