蜂窝轻钢门式刚架节点抗震性能试验研究  

Experimental study on seismic performance of joints in the castellated portal frame of light-weight steel

作　　者：郑述芳[1] 苏益声[2,3] 张雯[2] 李启良 

机构地区：[1]广西大学行健文理学院,南宁530005 [2]广西大学土木建筑工程学院,南宁530004 [3]广西防灾减灾与工程安全重点实验室,南宁530004 [4]广西华蓝设计(集团)有限公司建筑设计院,南宁530000

出　　处：《建筑结构》2014年第12期80-84,共5页Building Structure

基　　金：广西科学研究与技术开发计划项目(桂科攻0995008);广西防灾减灾与工程安全重点实验室项目(20122DX02)

摘　　要：为了研究蜂窝轻钢门式刚架节点的抗震性能,对该类新型节点进行了循环反复荷载试验。共设计4个蜂窝式节点和1个原型钢实腹式节点,考虑了节点连接形式、节点域加劲肋的设置和开孔中心至节点域距离三个变化参数对结构的影响。通过试验得到该类新型节点的破坏特征、荷载-位移曲线以及节点承载力,分析节点的耗能能力、延性、刚度退化等结构性能与变化参数的关系。试验研究表明:与原型钢实腹式节点相比,蜂窝式节点具有承载力高,刚度大的优点,但是耗能能力相对较弱;蜂窝式节点的耗能性能与节点的连接方式以及开孔中心至节点域的距离有关,而节点域加劲肋对节点抗震性能的影响不大。In order to study the seismic performance of joints in the castellated portal frame of light-weight steel, the low- cyclic reversed loading experiment was performed for this new structure type. The experiment members include four castellated joints and one original steel solid-web joint, considering three variable parameters including connection form of joints, stiffeners layout in joint region and the distance from the center of hole to joint region. From the test, the failure mode, the load-displacement curve and the bearing capacity were obtained, and the relationships of the structural performances such as the energy dissipation capacity, the ductility and stiffness degradation and so on with the variable parameters were given. The results show that the castellated joints have the advantages of high bearing capacity and high stiffness, but the energy dissipation is weak compared with the original steel solid-web joint. The connection types of joints and the distance from the center of hole to joint region have great effect on the energy dissipation of the castellated joints, and the stiffeners in joint region has little effect.

关 键 词：蜂窝构件 门式刚架 节点 轻钢结构 抗震性能 

分 类 号：TU392.5[建筑科学—结构工程]