Z2类疲劳细节钢-混凝土组合梁残余承载力试验研究  

Experimental Study on Residual Bearing Capacity of Steel-Concret Composite Beams with Fatigue Failure of Structural Details Z2

作　　者：袁西贵 YUAN Xigui(School of Urban Construction,Chengdu Polytechnic,Chengdu 610218,China)

机构地区：[1]成都职业技术学院城建学院,四川成都610218

出　　处：《太原学院学报（自然科学版）》2022年第3期1-7,共7页Journal of TaiYuan University:Natural Science Edition

基　　金：四川省教育厅2017年度科研计划自然科学类重点项目(17ZA0140)。

摘　　要：为深入了解最常见的钢-混凝土叠合板组合梁发生Z2类构造细节疲劳破坏后的残余静力承载力,对4根Z2类构造细节疲劳破坏后的叠合板组合梁进行了残余静力荷载试验。试验表明:叠合板组合梁疲劳破坏发生后依然表现出很好的延性,并具有极高的屈服和极限承载力,其值主要取决于疲劳寿命(钢梁的应力幅值)以及栓钉的界限剪力连接程度(是否存在滑移)。相比较而言,发生钢梁下翼缘切割边拉裂的疲劳破坏较之钢梁腹板与下翼缘连接处的热影响区发生疲劳破坏时延性更好,并具有更高更持久的承载能力。In order to understand in depth the residual static bearing capacity of composite beams of steel-concret laminated slabs after fatigue failure with the common structural details(class Z2)the author carried out static load tests on four composite beams(class Z2)after fatigue failure.It shows that the composite beams could show good ductility,and have very high yield and ultimate bearing capacity,which mainly depend on the fatigue life(stress amplitude of steel beams)and the limit shear connection degree of studs(slipping conditions).In comparison,the composite beam has better ductility and higher and more lasting bearing capacity in the cutting edge of the lower flange than that in the heat affected zone at the connection between the web and the lower flange of the steel beams when the fatigue failure occurs.

关 键 词：构造细节 叠合板组合梁 剪力连接程度 延性 残余静力承载力 

分 类 号：TU398[建筑科学—结构工程] TU997