钢管混凝土柱-H型钢梁无隔板节点力学性能研究  

Research on mechanical properties of diaphragm-free joint between CFST column and H-shaped steel beam

作　　者：王非[1] 杨晔[1] 杨卫忠[1] Wang Fei;Yang Ye;Yang Wei-zhong(Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学,河南郑州450001

出　　处：《工程抗震与加固改造》2020年第5期1-6,31,共7页Earthquake Resistant Engineering and Retrofitting

基　　金：河南省科技攻关重点项目(132102210500)。

摘　　要：为研究钢管混凝土柱-H钢梁节点在有、无隔板条件下的力学特性,基于有限元分析软件ABAQUS进行不同节点参数下的数值仿真模拟,在单调加载和拟静力加载工况下分别研究了内隔板、钢管柱壁厚度和H-型钢梁翼缘宽度对节点弯矩-转角关系的影响,考察了节点的整体变形、破坏形态以及滞回性能。结果表明:内隔板、钢管壁厚度能显著提高节点的初始转动刚度和极限承载能力,通过增大局部钢管柱的壁厚或钢梁翼缘宽度可使无隔板节点达到有隔板节点相近的弯曲性能,从而验证了无隔板节点的工程应用可行性。In this paper,the flexural performance of diaphragm-free joint between concrete-filled square tubular(CFST)column and H-shaped steel beam is studied.Full scalemodels are established by ABAQUS to simulate the mechanical behavior of the joints with different geometric parameters.The monotonic loading and hysteresis loading on the joints are carried.The existence of diaphragm,thickness of steel tubular,width of beam flange are used as parameters to study the influence on the relationship of bending moment vs.curvature(M-θ)of the joint.The deformation patterns,failure modes,and key section strains are observed and analyzed.The results show that thickness of steel tubular and inner diaphragm have a significant influence on the ultimate moment and initial rotational stiffness of the joint.The diaphragm-free joint with thicker tubular or wider beam flange has a nearly mechanical propertieswith ordinary joint on force transmissionby inner diaphragms.This will provide theoretical evidence for the application of the diaphragm-free connection in engineering.

关 键 词：钢管混凝土柱 无隔板节点 M-θ曲线 极限承载力 滞回曲线 

分 类 号：TU378.2[建筑科学—结构工程]