分布式连接全装配RC楼盖竖向承载力与变形分析  

ANALYSIS OF THE VERTICAL STRENGTH AND DEFLECTION OF DISCRETELY CONNECTED PRECAST RC FLOOR SYSTEMS

作　　者：庞瑞[1] 许清风 梁书亭[3] 朱筱俊[3] 吴见丰 PANG Rui;XU Qing-feng;LIANG Shu-ting;ZHU Xiao-jun;WU jian-feng(College of Civil Engineering and Architecture,Henan University of Technology,Zhengzhou 450001,China;Shanghai Key Laboratory of New Technology Research on Engineering Structure,SRIBS,Shanghai 200032,China;College of Civil Engineering,Southeast University,Nanjing 210096,China;Jinling Construction Group of Jiangsu Province,Nanjing 210000,China)

机构地区：[1]河南工业大学土木建筑学院,郑州450001 [2]上海市建筑科学研究院-上海市工程结构新技术重点实验室,上海200032 [3]东南大学土木工程学院,南京210096 [4]江苏省金陵建工集团有限公司,南京210000

出　　处：《工程力学》2019年第4期147-157,共11页Engineering Mechanics

基　　金：国家自然科学基金项目(51778214);河南省科技攻关项目(152102210066);河南省高等学校青年骨干教师资助计划项目(2015GGJS-037);河南工业大学青年骨干教师培育计划项目(21420004);河南省高等学校重点科研项目(17A560003)

摘　　要：在分布式连接新型全装配RC楼盖中,板与板之间通过连接件连接实现横板向传力。为研究新型楼盖竖向承载力计算方法,进行了新型楼盖在竖向荷载作用下的内力与变形分析。结果表明:基于正交各向异性弹性薄板小挠度理论和单三角级数法得到四边简支新型楼盖在竖向均布荷载作用下的弯矩与挠度表达式,提出了新型楼盖横板向刚度计算方法,并通过与试验和有限元结果对比,验证了所提方法的准确性;新型楼盖的挠度在两个方向呈空间抛物面分布,表明新型楼盖具有良好横板向传力性能;板缝连接可有效传递板内弯矩,但正交的两个方向弯矩传递效果存在差异,表现为顺板向弯矩的传递效果优于横板向。研究成果可为分布式连接全装配RC楼盖的研究和应用提供参考。In discretely connected precast RC floor/diaphragms (DCNPD), slab joints are connected by connectors to transfer internal force. An analysis program of internal force and deflection under vertical load was conducted to accureately determine the vertical strength of DCNPDs. The moment and deflection eqations of a DCNPD simply supported on four sides under uniformly distributed load are derived according to the small deflection theory of elastic thin perpendicular heterogeneous plates and are solved with trigonometric series. A model for estimating the bending stiffness of a DCNPD in the transverse direction is proposed and validated by comparing with finite element solutions and experimental results. The moment and deflection distributions of a DCNPD are ideally spatial parabolical, indicating that the DCNPD has excellent bidirectional mechanical behavior. The moment can be effectively transferred by the slab joints, especially in the slab laying direction rather than the orthogonal direction.

关 键 词：分布式连接 全装配式RC楼盖 板缝连接 横板向刚度 竖向承载力 

分 类 号：TU375.2[建筑科学—结构工程]