改进型非对称加腋节点的抗震性能分析  

Seismic performance analysis of improved asymmetric haunch connection

作　　者：刘永娟[1,2] 王燕[3] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]威海职业学院建筑工程系,山东威海264210 [3]青岛理工大学土木工程学院,山东青岛266033

出　　处：《世界地震工程》2015年第3期134-141,共8页World Earthquake Engineering

基　　金：国家自然科学基金资助项目(编号:51278259)

摘　　要：为研究十字型非对称加腋节点的抗震性能,设计了上翼缘翼缘板加强和下翼缘加腋的节点形式,并与仅下翼缘加腋、上翼缘盖板加强下翼缘加腋的加腋节点进行了对比研究,通过理论计算以及Ansys模拟研究了不同节点构造及参数取值对加腋节点抗震性能的影响。分析结果表明:3种构造的加腋节点试件塑性铰均发生离加腋端约梁高的1/4-1/3处。美国规范AISC steel design guide series12所计算的梁塑性破坏时剪力偏小。梁上翼下翼缘梁柱焊缝应力呈中部大两端小的分布趋势,上翼缘焊缝应力对于焊缝起到决定性作用。随着加腋长度的增加,塑性铰的位置离加强端的距离变大;翼缘板加强节点的梁柱上翼缘焊缝应力变小,其他2种构造节点应力有变大趋势;梁柱下翼缘的焊缝应力均随加腋长度的增加而变小;3种构造的试件最大承载力均随之加大。In order to research on the seismic performance of asymmetric haunch connection, the connections of top flange with plate reinforcement and bottom flange with haunch are designed, which are contrasted with connections of only bottom flange with haunch and connections of top flange with cover plate and bottom flange with haunch. The different nodes types and selection parameter on the influence of seismic performance of haunch connection have been researched through theoretical calculation and ansys simulation analysis. The results show that the plastic hinge of the three kinds of haunch connection occurred the place from the haunch end about 1/4 - 1/3 times of beam height . The beam plastic shear is smaller calculated by specification of AISC steel design guide seriesl2. The beam-column weld stress distribution of the beam top flange is large in the middle and is small in the end of beam section, the weld stress of top flange plays a decisive role. With the increase of haunch length, the distance from the position of plastic hinge to strengthening end will become bigger ; The beam-column weld stress on the top flange of plate reinforcement connection will decrease, that of other two types node have became large tendency; The beam bottom flange weld stress of three type connections will decrease ; The bearing capacity of three kinds of speci- men will become large

关 键 词：加腋节点 不同构造 加强板参数 抗震性能 

分 类 号：P315[天文地球—地震学]