节点连接形式对轻型门式刚架滞回性能影响研究  

Research on the influence of joint connection forms on the hysteretic behavior of light-weight portal frame

作　　者：王振山[1] 苏明周[2] 马辉[1] 潘秀珍[1] 

机构地区：[1]西安理工大学土木建筑工程学院,陕西西安710048 [2]西安建筑科技大学结构工程与抗震教育部重点实验室,陕西西安710055

出　　处：《地震工程与工程振动》2015年第4期179-189,共11页Earthquake Engineering and Engineering Dynamics

基　　金：陕西省科技厅自然科学基础研究计划项目(2014JW7288);西安理工大学博士启动基金(107-400211408)

摘　　要：本文针对端板竖放、平放和斜放柱脚铰接1/2榀1/2缩尺变截面门式刚架进行滞回性能研究,每种连接形式3个试件。试验对比分析了不同端板连接的破坏形式、P-Δ滞回曲线、骨架曲线、刚度退化情况以及螺栓的内力分布规律。研究结果表明:3种连接形式的门式刚架塑性变形能力较差,耗能能力较低;端板越厚、螺栓等级越高、数量越多的节点刚度越大,但后期刚度退化越严重。端板竖放与平放连接接近刚性节点,斜放节点的变形能力优于其它两种形式,相应的刚架耗能能力也较好,但承载力较低;综合分析破坏模式、承载力和变形能力等,建议设计时优先选用端板竖放连接形式。The hysteretic behavior of the half-span and variable cross-section portal frame with 1 /2 scaled is investigated in this paper. The beam-column joints of portal frames are formed respectively by erect end-plate,horizontal end-plate and inclined end-plate and each connection form is made into three specimens. The failure forms,P-Δhysteresis curves,skeleton curves,stiffness degradation and the bolts＇ internal force distribution regularity of the different end-plate connection forms are analyzed in detail. The research results show that the plastic deformation capacity and the energy dissipation capacity of the portal frame are low. The stiffness of joints becomes stronger with the increase of the end-plate＇thickness and the strength or the quantity of bolts,but the stiffness degradation of the joints is more serious in the late load stage. The beam-column joints using erect and horizontal end-plate are rigid connection forms. The deformation ability and energy dissipation capacity of the portal frame adopting the inclined end-plate joint is greater than the erect and the horizontal end-plate connection forms,but its bearing capacity decreases. According to the comprehensive analysis of the failure modes,bearing capacity and deformation capacity,the erect end-plate connection form is a good choice in the engineering design.

关 键 词：门式刚架 滞回性能 节点形式 端板连接 

分 类 号：TU392.5[建筑科学—结构工程] P315.92[天文地球—地震学]