带板钢筋混凝土框架连续倒塌理论分析

高佳明, 刘伯权, 黄华, 周长泉

高佳明, 刘伯权, 黄华, 周长泉. 带板钢筋混凝土框架连续倒塌理论分析[J]. 工程力学, 2018, 35(7): 117-126. DOI: 10.6052/j.issn.1000-4750.2017.03.0201
引用本文: 高佳明, 刘伯权, 黄华, 周长泉. 带板钢筋混凝土框架连续倒塌理论分析[J]. 工程力学, 2018, 35(7): 117-126. DOI: 10.6052/j.issn.1000-4750.2017.03.0201
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GAO Jia-ming, LIU Bo-quan, HUANG Hua, ZHOU Chang-quan. THEORETICAL ANALYSIS ON THE PROGRESSIVE COLLAPSE OF RC FRAME STRUCTURES WITH SLABS[J]. Engineering Mechanics, 2018, 35(7): 117-126. DOI: 10.6052/j.issn.1000-4750.2017.03.0201
Citation: GAO Jia-ming, LIU Bo-quan, HUANG Hua, ZHOU Chang-quan. THEORETICAL ANALYSIS ON THE PROGRESSIVE COLLAPSE OF RC FRAME STRUCTURES WITH SLABS[J]. Engineering Mechanics, 2018, 35(7): 117-126. DOI: 10.6052/j.issn.1000-4750.2017.03.0201
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带板钢筋混凝土框架连续倒塌理论分析

  • 长安大学建筑工程学院, 陕西, 西安 710061

基金项目: 国家自然科学基金项目（51578077，51778060）；陕西省自然科学基础研究计划项目（2016JM5050）；高等学校博士点专项科研基金项目（20130205130001）；中央高校基本科研业务费专项基金资助团队项目（310828173401）；中央高校基本科研业务费专项资金资助项目（310828171012）
详细信息
    作者简介:

    高佳明(1986-),男,河北张家口人,博士生,主要从事结构抗震与加固研究(E-mail:jiamingcareer@163.com);黄华(1979-),男,江苏常州人,教授,博士,硕导,主要从事结构抗震与加固研究(E-mail:huanghua23247@163.com).

    通讯作者:

    刘伯权(1956-),男,甘肃定西人,教授,博士,博导,主要从事结构抗震与倒塌机理研究(E-mail:bqliu@chd.edu.cn).

  • 中图分类号: TU375.4;TU317.1

THEORETICAL ANALYSIS ON THE PROGRESSIVE COLLAPSE OF RC FRAME STRUCTURES WITH SLABS

  • School of Civil Engineering, Chang'an University, Xi'an, Shaanxi 710061, China

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    摘要
  • 摘要: 采用拆除构件法对一榀两层2×1跨带板钢筋混凝土框架结构进行拟静力倒塌试验，分析了框架结构底层边柱失效后，剩余结构竖向倒塌的变形破坏模式以及受力机制。试验结果表明：带板混凝土结构连续倒塌抗力先后由梁拱-板压膜机制、梁拱-板拉膜机制、梁悬索-板拉膜机制、板拉膜机制提供；结构变形先后经历外推、内收、倒塌三个阶段，结构最大抗力出现在框架柱内收-外推转换点（梁悬索-板拉膜机制）。框架梁破坏后，结构转化为板柱模型，现浇板仍能将抗力维持在较高水平。理论分析了结构竖向连续倒塌关键变形处的临界位移和抗力值，提出了结构极限承载力计算方法，并建议同时考虑极限承载力和梁端转角对混凝土结构进行倒塌判定。
    Abstract: A quasi-static test was carried out to experimentally study the progressive collapse of a two-story 2×1 bay spatial frame structure with slabs. The progressive collapse mechanism and deformation failure mode of the residual structure due to a side column loss were analyzed. The results indicate that the whole collapse resistance of RC frame structure is successively provided by beam arch-slab pressure membrane mechanism, beam arch-slab tensional membrane mechanism, beam catenary-slab tensional membrane mechanism and slab tensional membrane mechanism. The structural deformation process experiences three stages including the extrapolative stage, adductive stage and collapsed stage. The maximum resistance appears at a breaking point, which lies between stringing inward section and pushing outward section of the frame column (beam catenary-slab tensional membrane mechanism). The structure changes into a slab-column model when the beam is damaged, and the slab can maintain the resistance at a high level. The resistance and critical displacement at the key points of structural collapse are theoretically analyzed. A calculation method of structural ultimate load-bearing capacity is proposed. The ultimate load-bearing capacity and beam's rotation angle should be taken into consideration in the criteria for structural collapse.
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    • 参考文献(19)
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出版历程
  • 收稿日期:  2017-03-14
  • 修回日期:  2017-09-28
  • 刊出日期:  2018-07-24

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