钢管混凝土格构柱-组合箱梁节点弯矩-转角曲线计算方法  

Calculation of the moment rotation curve of concrete-filled steel tubular lattice column composite box girder joints

作　　者：黄志 龚莉 蒋丽忠 周旺保[3] 戚菁菁[1] HUANG Zhi;GONG Li;JIANG Lizhong;ZHOU Wangbao;QI Jingjing(School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Hunan Engineering Research Center for Intelligently Prefabricate Passive House,Hunan University of Science and Technology,Xiangtan 411201,China;School of Civil Engineering,Central South University,Changsha 410075,China)

机构地区：[1]湖南科技大学土木工程学院,湖南湘潭411201 [2]湖南科技大学湖南省智慧建造装配式被动房工程技术研究中心,湖南湘潭411201 [3]中南大学土木工程学院,长沙410075

出　　处：《振动与冲击》2025年第2期187-198,共12页Journal of Vibration and Shock

基　　金：国家自然科学基金(51808213);湖南省自然科学基金(2019JJ50185,2021JJ30261);湖南省教育厅科学研究优秀青年项目(20B214)。

摘　　要：为研究钢管混凝土格构柱-组合箱梁节点的弯矩-转角关系,提出了基于极限弯矩、初始转动刚度的四折线弯矩-转角模型。对节点进行了低周往复荷载试验,分析试验结果,得到了三种节点连接件的滞回曲线、骨架曲线以及弯矩-转角曲线。基于钢结构设计标准,提出了适用于钢管混凝土格构柱-组合箱梁节点极限弯矩计算方法;基于组件法建立了节点的初始转动刚度计算模型,分别计算得到节点的极限弯矩与初始转动刚度值,并与试验值进行了对比,误差较小,吻合良好。基于极限弯矩、初始转动刚度建立了钢管混凝土格构柱-组合箱梁节点四折线弯矩-转角模型,对比验证了模型的正确性及适用性。该研究建立的四折线模型简单、精确且表达直观,可为钢管混凝土格构柱-组合箱梁节点结构设计和分析提供参考。To study the moment-rotation relationship of concrete-filled steel tubular lattice column composite box girder joints,a four-fold line moment-rotation model was proposed based on the ultimate moment and initial rotational stiffness.The hysteretic curves,skeleton curves and moment rotation curves of three kinds of joints were obtained by analyzing the test results.Based on the design standard of steel structure,the calculation method for the ultimate bending moment was proposed.Based on the component method,a calculation model for the initial rotational stiffness of the joint was established.The calculated ultimate moment and initial rotational stiffness values of the joints were compared with the test values,showing a small error and good agreement.Based on the ultimate bending moment and initial rotational stiffness,a four-fold line moment rotation model for the concrete-filled steel tubular lattice column composite box girder joints were established,and the correctness and applicability of the model were verified by comparison.The four-fold line model established is simple,accurate and intuitive,providing a reference for the design and analysis of concrete-filled steel tubular lattice column composite box girder joints structures.

关 键 词：钢管混凝土格构柱 节点 组件法 弯矩-转角模型 极限弯矩 

分 类 号：TU393[建筑科学—结构工程]