环口板加强型T节点滞回性能的试验研究  

EXPERIMENTAL STUDY ON HYSTERETIC BEHAVIOUR OF CIRCULAR TUBULAR T-JOINTS REINFORCED WITH COLLAR-PLATE

作　　者：邵永波[1] 岳永生[1] 蔡艳青[1] 

机构地区：[1]烟台大学土木工程学院,烟台264005

出　　处：《工程力学》2011年第10期209-215,共7页Engineering Mechanics

基　　金：国家自然科学基金项目(50808153)

摘　　要：环口板加固管节点是一种比较新颖的加固方法,该方法施工方便快捷而且加固效果显著。为了进一步研究环口板加固后管节点的性能特点,分别对4个足尺度未加固T型圆钢管节点和4个对应的采用环口板加固的足尺度T节点试件进行了轴向反复荷载作用下的拟静力滞回性能研究。基于试验测试结果,发现加固后的管节点在提高静力承载力的同时,其延性指标也有所提高,从而耗能性能更好,利于抗震。根据试验现象发现:采用环口板加固的T节点,可以将破坏发生的部位由原来未加固节点的焊趾处转移到环口板与主管表面焊缝连接的端角上,改变了管节点的破坏模式。Collar plate reinforcement is a new reinforcing method for tubular joints, and it is of fast fabrication and effective. To carry out further study on the behaviour of tubular joints after reinforced with collar plate, the hysteretic behaviour of 4 full-scale un-reinforced tubular T-joints and 4 corresponding T-joint specimens reinfoced with collar plate under quasi-static axial cyclic loading is investigated experimentally. Based on the experimental results, it is found that both the static strength and the ductility are increased for the reinforced specimen, and thus the reinforced T-joint can dissipate more energy caused by seismic actions. It is also found from the experimental phenomenon that the failure position is located at the comer of the collar plate, which is much different from the un-reinforced specimen for which the failure position is located at the weld toe along the brace/chord intersection.

关 键 词：T型管节点 环口板 滞回性能 耗能 破坏模式 

分 类 号：TU391[建筑科学—结构工程]