预制混凝土叠合楼板新型连接构造的力学性能研究  

Research on mechanical properties of prefabricated concrete composite floor with new connection

作　　者：张敏[1,2] 秦稳 卢旦 陈宜虎[4] 潘丹 ZHANG Min;QIN Wen;LU Dan;CHEN Yihu;PAN Dan(College of Civil Engineering and Architecture,Guilin University of Technology,Guilin 541004,China;Guangxi Key Laboratory of Rock and Soil Mechanics and Engineering,Guilin 541004,China;East China Architectural Design&Research Institute Co.,Ltd.,Shanghai 200002,China;College of Civil Engineering and Architecture,Hezhou University,Hezhou 542899,China)

机构地区：[1]桂林理工大学土木与建筑工程学院,桂林541004 [2]广西岩土力学与工程重点实验室,桂林541004 [3]华东建筑设计研究院有限公司,上海200002 [4]贺州学院建筑工程学院,贺州542899

出　　处：《建筑结构》2022年第6期26-31,130,共7页Building Structure

基　　金：国家重点研发计划(2016YFC0701902-4);广西自然科学基金资助项目(2018GXNSFAA050145)。

摘　　要：对四个采用不同连接构造装配制作的预制混凝土叠合板试件进行单调静力加载试验,研究试件的破坏形态、承载极限等力学性能,并进行有限元分析。结果表明:各试件均经历弹性阶段、弹塑性阶段及破坏阶段,属于延性破坏,试件承载力均达到设计预期,与现浇试件理论计算的承载力相当;所有试件的破坏位置均出现在连接区域之外的断面,并非在跨中位置,实现了节点处“强连接”的目标;钢筋U型连接以及侧面开槽封闭环筋搭接连接构造的钢筋均能实现有效锚固;叠合板的预制层可与后浇层协同工作。The monotonic static loading test was carried out on four prefabricated concrete composite slab specimens assembled with different connection structures, and the mechanical properties such as the failure form and bearing limit of the specimen were studied and finite element analysis was carried out. The results show that each specimen has undergone an elastic stage, an elastoplastic stage and a failure stage, which belong to the ductile failure. The bearing capacity of the specimen has reached the design expectation, which is equivalent to the theoretical calculation of the cast-in-place specimen. The damage position of all specimens appear on the cross section outside the connection area, not at the mid-span position, achieve the goal of “strong connection” at the node. The steel bar U-shaped connection and the steel bar with the side slotted closed ring bar lap connection structure can achieve effective anchorage. The prefabricated layer of the laminated board can work with the post-cast layer.

关 键 词：预制混凝土叠合楼板 新型连接 静力加载试验 数值分析 破坏形态 

分 类 号：TU375.2[建筑科学—结构工程] TU317.1