边缘叠合板等强配筋拼缝试验研究  

Experimental study on edge laminated slabs connected with equal strength reinforcement seam

作　　者：廖智强 刘庆文[2] 陈甫亮 冯唐彪 罗振杰 廖桢颖 LIAO Zhiqiang;LIU Qingwen;CHEN Fuliang;FENG Tangbiao;LUO Zhenjie;LIAO Zhenying(DIT Group Limited,Changsha 410000,China;School of Civil Engineering and Architecture,Nanchang Hangkong University,Nanchang 330063,China)

机构地区：[1]筑友智造建设科技集团有限公司,长沙410000 [2]南昌航空大学土木建筑学院,南昌330063

出　　处：《建筑结构》2022年第2期104-109,共6页Building Structure

基　　金：“科技助力经济2020”重点专项(SQ2020YFF0426587);湖南省工业化建造工程技术研究中心(2019TP2081);中民筑友装配式建筑创新创业团队;江西省教育厅科技项目(GJJ170596)。

摘　　要：提出一种新型边缘叠合板,为了研究钢筋混凝土边缘叠合板拼缝的受力性能,设计并实施了不同构造形式边缘叠合板的静力加载试验,包含附加钢筋形式、马镫筋布置、拼缝尺寸和底筋伸出等变量,分析了不同构造措施下,等强配筋设计边缘叠合板裂缝开展情况、挠度、钢筋应力以及受弯承载力性能,并与现浇板进行了对比。试验结果表明:该拼缝形式的拼缝板均为典型的弯曲破坏特征;拼缝处附加钢筋只要保证足够的粘结长度,附加钢筋就能够进行有效传力,采取等强配筋的边缘叠合板承载能力等同于现浇板;U形钢筋达到屈服需满足粘结锚固长度要求;钢筋网片末端弯折可以有效地减少钢筋锚固长度;拼缝处连接钢筋面积可按现浇层混凝土厚度进行受弯承载力计算确定。A new type of edge composite slab was proposed. In order to study the stress performance of reinforced concrete edge composite slab seams, static load tests of edge laminated slabs with different structural forms were designed and implemented, including variables such as the form of additional reinforcement, the layout of stirrup reinforcement, the size of the seam and the extension of the bottom reinforcement. The crack development, deflection, steel stress and flexural bearing capacity of the edge composite slabs with different structural measures and reinforced with the equal strength principle were analyzed and compared with the cast-in-situ slabs. The test results show that the seam plates of this seam form are all typical bending failure characteristics. As long as the additional steel bars at the seams ensure sufficient bonding length, the additional steel bars can effectively transmit force. The load-bearing capacity of this type of equal strength reinforcement edge laminated slab is equivalent to that of the cast-in-situ slab. The U-shaped steel bar at the seam need to meet the requirements of the bond anchorage length to reach yield. The bending of the end of the steel mesh can effectively reduce the anchorage length of the steel bar. The area of connecting steel bars at the seams can be calculated and determined according to the concrete thickness of the cast-in-situ layer.

关 键 词：装配式 钢筋混凝土边缘叠合板 边缘拼缝 等强配筋 静载试验 

分 类 号：TU375.2[建筑科学—结构工程]