华南理工大学学报(自然科学版) ›› 2017, Vol. 45 ›› Issue (12): 135-142.doi: 10.3969/j.issn.1000-565X.2017.12.020

• 土木建筑工程 • 上一篇    下一篇

连接性能对组合框架抗倒塌性能的影响

高山1,2  郭兰慧3 张素梅3   

  1. 1. 重庆大学 土木工程博士后流动站,重庆 400045; 2. 西京学院 陕西省混凝土结构安全与耐久性重点实验室, 陕西 西安 710123; 3. 哈尔滨工业大学 土木工程学院,黑龙江 哈尔滨 150090
  • 收稿日期:2016-12-14 修回日期:2017-02-28 出版日期:2017-12-25 发布日期:2017-10-31
  • 通信作者: 高山(1985-),男,博士,副教授,主要从事钢与组合结构抗连续倒塌性能研究. E-mail:gaoshan@hit.edu.cn
  • 作者简介:高山(1985-),男,博士,副教授,主要从事钢与组合结构抗连续倒塌性能研究.
  • 基金资助:
    国家自然科学基金资助项目(51408106);国家重点研发计划专项(2016YFC0701203);中国博士后科学基金资助 项目(2017M622965);重庆市博士后特别资助项目(Xm2017095)

Influence of Connection Behavior on Anti-Collapse Performance of Composite Frames

GAO Shan1,2 GUO Lan-hui3 ZHANG Su-mei3   

  1. 1.Postdoctoral Station of Civil Engineering,Chongqing University,Chongqing 400045,China; 2.Shaanxi Key Laboratory of Safety and Durability of Concrete Structures,Xijing University,Xi'an 710123,Shaanxi,China; 3.School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,Heilongjiang,China
  • Received:2016-12-14 Revised:2017-02-28 Online:2017-12-25 Published:2017-10-31
  • Contact: 高山(1985-),男,博士,副教授,主要从事钢与组合结构抗连续倒塌性能研究. E-mail:gaoshan@hit.edu.cn
  • About author:高山(1985-),男,博士,副教授,主要从事钢与组合结构抗连续倒塌性能研究.
  • Supported by:
    Supported by the National Natural Science Foundation of China(51408106),the National Key R&D Program of China (2016YFC0701203),China Postdoctoral Science Foundation (2017M622965) and Chongqing Postdoctoral Special Foundation (Xm2017095)

摘要: 梁柱连接是内力重分配的关键构件,其性能会对结构的抗连续倒塌能力带来显著的影响。本文建立了三层钢-混凝土组合框架的有限元模型,对其进行了动力拆柱分析,分别研究了连接刚度和强度对于组合框架抗倒塌性能的影响。结果表明:连接刚度和强度对于边跨层间组合效应的影响要大于内跨悬索作用的影响;连接刚度对于梁中轴力的发展程度具有明显影响;连接性能的改变不会影响各楼层间的独立承载;连接性能的改善可以减小在内力重分配过程对于边界约束条件的依赖程度。

关键词: 组合结构, 连续倒塌, 动力分析, 梁柱连接, 悬索效应

Abstract: The beam-column connection plays a key role in the redistribution of internal force,and its behavior has a significant influence on the performance of structures in resisting progressive collapse.In this paper,a finite ele- ment model is constructed for a three-storey steel-concrete composite frame,and the influence of the connection stiffness and strength on the anti-collapse behavior of the composite frame is analyzed by means of the dynamic-col- umn-removal method.The results show that (1) the influence of the connection stiffness and strength on the com- posite effect between the floors in a side span is greater than that on the catenary action in inner spans; (2) the development of the axial force in the beams depends on the connection stiffness,rather than the connection strength; (3) the change of the connection behavior has no influence on the load-carrying independence of each floor; and (4) the improvement in the connection behavior can reduce the demand for the boundary restraint con- dition during the redistribution of internal force.

Key words: composite structures, progressive collapse, dynamic analysis, beam-column connection, catenary action