不同连接方式叠合板-现浇梁滞回性能试验研究  

Experimental study on hysteretic behavior of composite slab and cast-in-situ beam with different connection modes

作　　者：郑嘉润 张明山 李本悦[2,3] 徐铨彪 龚顺风[1] ZHENG Jia-run;ZHANG Ming-shan;LI Ben-yue;XU Quan-biao;GONG Shun-feng(Department of Civil Engineering,Zhejiang University,Hangzhou 310058,China;Architectural Design&Research Institute of Zhejiang University Limited Company,Hangzhou 310028,China;Center for Balance Architecture,Zhejiang University,Hangzhou 310028,China)

机构地区：[1]浙江大学土木工程学系,浙江杭州310058 [2]浙江大学建筑设计研究院有限公司,浙江杭州310028 [3]浙江大学平衡建筑研究中心,浙江杭州310028

出　　处：《浙江大学学报（工学版）》2023年第9期1718-1726,共9页Journal of Zhejiang University：Engineering Science

基　　金：浙江省重点研发计划资助项目(2018C03033-1);住房和城乡建设部科技资助项目(2021-k-052)。

摘　　要：为了提高叠合板中预制底板与现浇梁的现场施工效率和连接性能,提出预制底板与现浇梁的斜插筋连接方式.通过对4种不同连接方式的叠合板-现浇梁试件进行低周往复加载试验,对比分析叠合板-现浇梁试件的裂缝开展及分布、滞回特性、骨架曲线、延性、刚度退化和耗能能力等滞回性能,研究采用出筋、斜插筋、叠合面钢筋和凹槽钢筋4种连接方式对叠合板-现浇梁试件滞回性能的影响.结果表明:采用斜插筋连接的试件滞回性能与采用传统出筋连接的试件滞回性能基本相似;采用叠合面钢筋搭接的试件正向承载力较大,反向承载力较小,该连接方式试件的正、反向承载力相比其他连接方式试件的不对称性更显著;采用凹槽钢筋连接的试件承载能力、延性、耗能能力均优于采用出筋和斜插筋连接的试件;剪跨比对采用出筋连接和斜插筋连接的试件承载力影响较小,对采用斜插筋连接的试件反向延性系数影响较大.A connection mode using oblique reinforcements between precast bottom plate and cast-in-situ beam was proposed,in order to improve the on-site construction efficiency and the connection performance of the precast bottom plates in composite slabs and cast-in-situ beams.Through the low reversed cyclic loading tests on composite slab and cast-in-situ beam specimens using four different connection modes,the hysteretic behaviors of composite slab and cast-in-situ beam specimens such as crack development and distribution,hysteretic characteristics,skeleton curves,ductility,stiffness degradation and energy dissipation capacity were comparatively analyzed.The influences of four different connection modes using extended steel bars,oblique reinforcements,steel bars laid on the combined surfaces and steel bars in grooves on the hysteretic behaviors of the composite slab and cast-in-situ beam specimens were studied.Results show that the hysteretic behaviors of the specimens using oblique reinforcement connection are basically similar to those of the specimens using conventionally extended steel bar connection.The positive bearing capacity of the specimens using steel bar laid on the combined surfaces is large,while the reverse bearing capacity is small,and the asymmetry of the positive and reverse bearing capacity of the specimens the connection mode is more significant compared to the specimens using the other connection modes other connection methods.The bearing capacity,the ductility and the energy dissipation capacity of the specimens using reinforcing bars in grooves connection are better than those of the specimens using extended steel bars and oblique reinforcements connection.The shear span ratio has less influence on the bearing capacity of the specimens using extended steel bars connection and the specimens using oblique reinforcements connection but has greater influence on the reverse ductility coefficient of the specimens using oblique reinforcements connection.

关 键 词：叠合板 现浇梁 连接方式 出筋连接 斜插筋连接 叠合面钢筋连接 凹槽钢筋连接 滞回性能 

分 类 号：TU375[建筑科学—结构工程]