端板连接蜂窝梁-柱节点抗震性能试验研究  

Experimental Research on Seismic Performance of End-Plate Connections Between Castellated Beams and Columns

作　　者：贾连光[1] 毕然[1] 李秋镕 JIA Lianguang;BI Ran;LI Qiurong(School of Civil Engineering,Shenyang Jianzhu University,Shenyang 110168,China)

机构地区：[1]沈阳建筑大学土木工程学院,沈阳110168

出　　处：《工业建筑》2022年第12期121-127,共7页Industrial Construction

基　　金：国家自然科学基金项目(51578346)。

摘　　要：为研究开孔形状、开孔率和混凝土楼板对蜂窝梁柱端板连接节点抗震性能的影响,设计4个足尺边节点并进行拟静力加载试验,研究试件破坏模式、承载能力、延性和耗能性能等。结果表明:对有楼板的试件,孔型对节点破坏形态和抗震性能影响较大,六边形孔更易发生梁铰破坏且耗能性能更好;开孔率对节点的破坏形态、承载能力和延性影响较大,适当提高开孔率有利于应力由端板连接处向首孔迁移,降低端板与柱翼缘的应变极限值;楼板的组合效应使节点的抗弯承载力提高25%以上,耗能和延性分别提高16.5%和30.7%,极限转角提高40.9%,但会减弱应力由端板连接处向首孔的迁移效应。对于梁铰破坏形式的组合节点,采用ASCE中对腹板开洞组合梁的承载力计算方法所得结果与试验值吻合较好。In order to study the effects of opening shape, opening ratio and concrete floor on the seismic performance of the end-plate joint of castellated beam-to-column, four full-scale side joints were designed and tested under quasi-static loading. The failure mode, bearing capacity, ductility and energy dissipation of the specimens were studied. The results showed that for the specimens with floor plates, the opening shape had a great influence on the failure mode and seismic performance of joints, the hexagonal opening was more prone to beam hinge failure and showed a better energy dissipation. The opening ratio had a great influence on the failure mode, bearing capacity and ductility of the joints, appropriately increasing the opening ratio was conducive to the stress migrated from the end plate connection to the first opening, and the strain limit value between the end plate and the column flange was reduced. The combined effect of the floor increased the flexural capacity of the joints by more than 25%, the energy consumption and ductility by 16.5% and 30.7%, and the ultimate angle by 40.9%, respectively, but weakened the stress migration effect from the end plate joint to the first opening.

关 键 词：蜂窝梁 端板连接 应力迁移 塑性铰 拟静力试验 抗震性能 

分 类 号：TU352.11[建筑科学—结构工程]