基于栓钉剪坏叠合板组合梁剩余静力刚度试验研究  

Experimental Study of Residual Static Stiffness of Composite Beam with Laminated Slab Based on Studs Destroyed

作　　者：袁西贵 YUAN Xigui(School of Urban Construction,Chengdu Polytechnic,Chengdu,Sichuan 611433)

机构地区：[1]成都职业技术学院城建学院,四川成都611433

出　　处：《绍兴文理学院学报》2022年第4期1-6,共6页Journal of Shaoxing University

基　　金：四川省教育厅科研计划自然科学类重点项目“大跨度斜拉桥新型横向抗震阻尼器抗震性能的数值分析与设计方法”(17ZA0140).

摘　　要：为了解疲劳破坏形态取决于栓钉的叠合板组合梁在不同荷载循环后的荷载-位移性能,对其进行整梁剩余静力刚度(不计入残余变形)退化试验,并对试验结果进行数值拟合,结果表明:叠合板组合梁的剩余静力刚度随反复荷载作用次数的增加而略有减少.直到疲劳破坏发生前试验梁的静力刚度降低不足8.5%,疲劳破坏发生后残余静力刚度降低则高达50%,而残余承载力较高,本次试验梁FSCB-6高达84.5%.这些数值主要取决于组合梁截面几何参数、钢梁的牌号以及剪力连接件型号及其连接程度.In order to understand the force-displacement performance of composite beam with laminated slab after different load cycle whose fatigue failure mode depends on the studs,this paper carried out the static stiffness degradation test of the whole beam and the experimental results were fitted numerically.The results show that the residual static stiffness of composite beam decreases slightly with the increase of the number of repeated loads.The static stiffness of the test beam is reduced by less than 8.5%before the fatigue damage occurs.The residual static stiffness is reduced by up to 50%after the fatigue failure,but the residual bearing capacity is as high as 84.5%for FSCB-6.All this mainly depends on the composite beam section size,steel beam brand,as well as shear connector type and the degree of shear connection.

关 键 词：叠合板组合梁 剪力连接程度γ 应力幅 等幅疲劳荷载 剩余静力刚度 

分 类 号：TU398[建筑科学—结构工程] TU997