建筑结构学报2017，Vol.38Issue(12)：12-21,10.DOI:10.14006/j.jzjgxb.2017.12.002
带混凝土楼板的钢框架梁柱弱轴连接节点滞回性能试验研究
Experimental investigation on cyclic performance of beam-to-column weak-axis connections with concrete slab in steel frame
摘要
Abstract
To experimentally evaluate the composite effect on the cyclic performance of weak-axis column bending connections,ten cruciform joint specimens were tested under reversal of loads,including five bare steel joint (SJ) specimens and five steel-concrete composite joint (CJ) specimens reinforced with partial shear connection.The form of beam-end was designed with standard,reduced,plate covered,widened flange,and welded haunch,respectively.The experimental phenomenon,failure mode,hysteretic curves,strain and stress distribution of steel beam and energy dissipation capacity of each specimen were analyzed and discussed.The results show that beam bottom flange welds of CJ crack in different degrees except the haunch specimen,while the beam top flange welds and web bolts could continue to bear large loads.However,beam top and bottom flange welds of SJ crack,resulting in the abrupt strength degradation.The hysteretic curves of SJ are plumper than that of C J,since the shape of hysteretic curves of CJ gradually becomes anti S due to the influence of web bolts slippage.The neutral axis of CJ cross-section exhibits a significant upward shift under positive bending,thus developing a larger strain in the bottom flange than that of SJ.The plastic hinge can effectively move away from the column-to-beam connection in the reduced specimens,which have the most stable and reliable cyclic response,thus this joint form is recommended first.The welding quality is the key factor which could influence the hysteretic behavior of joints,and lamellar tearing resistant steel is suggested to be used in skin plates.关键词
钢-混凝土组合节点/弱轴/部分抗剪连接/拟静力试验/滞回性能Key words
steel-concrete composite joint/weak-axis/partial shear connection/quasi-static test/hysteretic performance分类
建筑与水利引用本文复制引用
卢林枫,徐莹璐,郑宏,周天华..带混凝土楼板的钢框架梁柱弱轴连接节点滞回性能试验研究[J].建筑结构学报,2017,38(12):12-21,10.基金项目
国家自然科学基金项目(51278061),中央高校基本科研业务费专项(310828175002). （51278061）
