T型圆钢管相贯节点损伤分析及平面内弯曲刚度研究  

DAMAGE ANALYSIS AND IN-PLANE BENDING STIFFNESS OF UNSTIFFENED TUBULAR T-JOINT

作　　者：魏科丰[1] 付伟飞[2] 

机构地区：[1]长江大学工程技术学院,湖北荆州434020 [2]河南大学基建处,河南开封475001

出　　处：《工业建筑》2017年第8期125-130,共6页Industrial Construction

基　　金：湖北省教育厅科学技术研究项目(B2016446);长江大学工程技术学院青年科研基金项目(15j0201)

摘　　要：通过对3个主管不同截面的T型相贯节点进行低周反复静力加载试验,分析了T型相贯节点在不同荷载作用下的受力变形和应力、应变情况,同时对主管和支管上的相贯线周围进行了应力、应变分析,对T型圆钢管相贯节点的平面内弯曲刚度进行了测试。采用荷载直接垂直于支管端部的加载方式,求出3个主管不同截面的T型相贯节点的最大承载力,并与规范计算结果进行对比分析,研究了相贯节点平面内的刚度问题。研究表明:在其他参数一定的情况下,支管与主管直径相差较多时,相贯节点刚度、强度均较弱。实际工程设计中宜对节点进行加强处理;支管与主管直径接近时,能够满足节点刚接要求,且节点刚度较大。Three unstiffened tubular T-joint with different cross-section of main tubular were tested under low-cyclic loading to analyze the deformation and the stress-strain of the joints under different loads. The stress-strain around the intersecting line of main pipe and branch pipe was analyzed,the in-plane bending stiffness for unstiffened tubular Tjoint was also tested. The test loads were applied vertically to the branch pipe ends to obtain the ultimate bearing capacity of three specimens. Comparing the calculated results and the specification,the in-plane stiffness of the joints was analyzed. The results showed that in certain condition,when the diameter of branch pipe was different from that of main pipe,the stiffness and strength of the joints were weak. In the actual engineering design,the joints should be strengthened. When the diameter of branch pipe was close to that of the main pipe,it could meet the requirements of rigid connection because of large stiffness.

关 键 词：钢管结构 T型圆钢管相贯节点 应力、应变分析 弯曲刚度 

分 类 号：TU392.3[建筑科学—结构工程]