工程力学 ›› 2019, Vol. 36 ›› Issue (S1): 37-43,58.doi: 10.6052/j.issn.1000-4750.2018.05.S005

• 土木工程学科 • 上一篇    下一篇

分布式连接全装配RC楼盖横板向弯曲刚度计算方法研究

庞瑞1, 张艺博1, 张天鹏1, 李倩倩1, 梁书亭2   

  1. 1. 河南工业大学土木建筑学院, 郑州 450001;
    2. 东南大学土木工程学院, 南京 210096
  • 收稿日期:2018-05-02 修回日期:2018-12-24 出版日期:2019-06-18 发布日期:2019-06-18
  • 通讯作者: 庞瑞(1981-),男,河南信阳人,副教授,工学博士,硕导,从事装配式混凝土结构研究(E-mail:seupangrui@163.com). E-mail:seupangrui@163.com
  • 作者简介:张艺博(1994-),女,河南巩义人,硕士生,从事装配式混凝土结构研究(E-mail:civilzhangyibo@163.com);张天鹏(1994-),男,河南南阳人,硕士生,从事装配式混凝土结构研究(E-mail:1351863198@qq.com);李倩倩(1993-),女,河南淮阳人,硕士生,从事装配式混凝土结构研究(E-mail:1475020945@qq.com);梁书亭(1964-),男,河南禹州人,教授,工学博士,博导,从事结构工程研究(E-mail:stliang@seu.sdu.cn).
  • 基金资助:
    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);河南省高等学校重点科研项目(17A560003);省属高校基本科研业务费专项资金项目(2017RCJH04)

TUDY ON THE BENDING STIFFNESS CALCULATION METHOD OF DCNPD IN THE ORTHOGONAL SLAB LAYING DIRECTION

PANG Rui1, ZHANG Yi-bo1, ZHANG Tian-peng1, LI Qian-qian1, LIANG Shu-ting2   

  1. 1. College of Civil Engineering and architecture, Henan University of Technology, Zhengzhou 450001, China;
    2. College of Civil Engineering, Southeast University, Nanjing 210096, China
  • Received:2018-05-02 Revised:2018-12-24 Online:2019-06-18 Published:2019-06-18

摘要: 在分布式连接全装配RC楼盖(DCNPD)中,板与板之间和梁板之间通过连接件连接以提高楼盖的竖向承载力和平面内刚度。为研究DCNPD竖向承载力计算方法,在试验基础上进行了DCNPD横板向弯曲刚度理论与数值模拟分析。结果表明: DCNPD的竖向承载能力略小于现浇楼盖,远大于不加连接件的装配式楼盖,验证了DCNPD板缝构造横板向传力的有效性;建立了DCNPD横板向弯曲刚度简化分析模型,基于等效梁模型理论提出DCNPD横板向弯曲刚度计算方法,并验证了该方法用于楼盖竖向承载力弹性分析的可行性;楼盖的板缝数和连接件个数对其横板向与整体楼盖的竖向承载能力影响较大,而板缝数的影响更为显著,工程中在运输和吊装条件允许的情况下,宽板预制方案可有效提高楼盖的竖向承载能力。研究成果可为分布式连接全装配RC楼盖的研究应用提供参考和依据。

关键词: 全装配RC楼盖, 板缝, 分布式连接, 横板向弯曲刚度, 竖向承载力

Abstract: In order to enhance the vertical bearing capacity and in-plane stiffness of discrete connected new-type precast RC floor diaphragms (DCNPD), slab joints and slab-beam joints are connected by mechanical connectors. The theoretical and numerical studies of bending stiffness in the orthogonal slab laying direction (OSLD) were conducted to reveal the vertical bearing capacity of DCNPD based on experimental results. The result shows that:the vertical bearing capacity of DCNPD is slightly smaller than that of cast-in-situ floor, but much higher than that of the precast floor without slab joint connectors, demonstrating that the connectors are effective in transferring the OSLD force in DCNPD. An analytical model for bending stiffness in OSLD was constructed and the bending stiffness calculation method (which was verified valid in the elastic analysis of DCNPD) in OSLD of DCNPD was proposed based on equivalent beam-model theory. Both slab numbers and connector numbers are main factors for the vertical bearing capacity of DCNPD, but slab numbers are more vital compared with connector numbers. It is proposed that wide-precast-slab plan should be preferred when the transportation and hoisting conditions are available. The results can provide a reference for further studies and project practices of DCNPD.

Key words: precast RC floor diaphragm, slab joint, discrete connection, bending stiffness in OSLD, vertical bearing capacity

中图分类号: 

  • TU375.2
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