(1 河南工业大学土木工程学院, 郑州 450001; 2 河南工业大学设计研究院, 郑州 450001)

摘要: 为研究分布式连接全装配 RC 楼盖(DCPCD)横板向传力性能,完成了 8 个对边简支试件的竖向静载试验.基于共轭法提出了 DCPCD 横板向刚度的计算方法,并研究了板缝数量、板缝连接件数量、楼盖跨度和横板向与顺板向刚度比等参数对 DCPCD 横板向传力性能的影响. 结果表明:DCPCD 试件的板缝连接件受力性能良好,可有效地传递横板向弯矩和剪力,并能较好地协调相邻预制板的变形;基于共轭法的 DCPCD 横板向刚度计算方法的精度比最小截面刚度法和折线变形法高;减少板缝数量、增加板缝连接件数量均可有效改善楼盖横板向的传力性能,提高楼盖的竖向承载力和刚度;基于楼盖承载力与振动舒适度的要求,建议四边简支楼盖横纵向刚度比的取值范围为 0. 3~ 0. 75.

关键词: 分布式连接; 全装配式 RC 楼盖; 横板向传力性能; 抗弯刚度; 横板向与顺板向刚度比

中图分类号:TU375. 2 文献标志码:A 文章编号:1002-848X(2023)10-0074-08

DOI:10. 19701 / j. jzjg. LS210374

Experimental study and theoretical analysis of force transmission performance in orthogonal slab laying direction of untopped precast RC floor

PANG Rui1, SUN Yuanyuan1, ZHANG Lanbo1, DUAN Jinru2

(1 College of Civil Engineering, Henan University of Technology, Zhengzhou 450001, China;2 Design and Research Institute, Henan University of Technology, Zhengzhou 450001, China)

Abstract: In order to investigate the force transmission performance in orthogonal slab slaying direction ( OSLD) ofdiscretely connected precast RC floor diaphragm (DCPCD), the vertical static load tests consisting eight specimens underthe consition of opposite sides simply supported were conducted. Based on the conjugate method, the calculation method ofstiffness in OSLD of DCPCD was put forward, and the influence of the number of slab joints, the number of slab jointconnectors, the span of floor and the stiffness ratio in OSLD and slab laying direction ( SLD) on the force transmissionperformance of DCPCD was investigated. The results show that the slab joint connectors of DCPCD have good workingperformance, it can effectively transmit the bending moment and shear force in OSLD, and it can better coordinate thedeformation between adjacent precast slabs. The stiffness calculation method in OSLD of DCPCD based on conjugatemethod theory has higher calculation accuracy than the minimum section stiffness method and folded line deformationmethod. Reducing the number of slab joints and increasing the number of slab joint connectors can effectively improve theforce transmission performance in OSLD of the floor, and improve the vertical bearing capacity and stiffness of the floor.Based on the requirements of floor bearing capacity and serviceability, it is suggested that the stiffness ratio in OSLD andSLD of floor simply supported on four sides is 0. 3~ 0. 75.

Keywords:discretely connected; untopped precast RC floor; force transmission performance in orthogonal slab layingdirection; flexure stiffness; stiffness ratio in orthogonal slab laying direction and slab laying direction

∗国家自然科学基金( 51778214),中原千人计划支持项目( ZYQR201912170),河南工业大学自科创新基金支持计划(2022ZKCJ05),河南省粮油仓储建筑与安全重点实验室开放课题(2021KF-02).

第一作者:庞瑞,博士,教授,博士生导师,主要从事装配式混凝土结构研究,Email:seupangrui@ 163. com.

[引用本文] 庞瑞,孙园园,张岚波,等. 全装配式 RC 楼盖横板向传力性能试验研究及理论分析[ J]. 建筑结构,2023,53(10):74-81. PANG Rui,SUN Yuanyuan,ZHANG Lanbo,et al. Experimental study and theoretical analysis offorce transmission performance in orthogonal slab laying direction of untopped precast RC floor[ J]. Building Structure,2023,53(10):74-81.