兰州理工大学学报

兰州理工大学学报 ›› 2025, Vol. 51 ›› Issue (3): 107-112.

• 建筑科学 • 上一篇    下一篇

循环荷载作用下带延性铸造连接件的防屈曲支撑受力性能参数分析

殷占忠*1,2, 杨永安1, 张素峰1   

  1. 1.兰州理工大学 土木工程学院, 甘肃 兰州 730050;
    2.兰州理工大学 西部土木工程防灾减灾教育部工程研究中心, 甘肃 兰州 730050
  • 收稿日期:2022-01-03 出版日期:2025-06-28 发布日期:2025-06-30
  • 通讯作者: 殷占忠(1979-),男,甘肃陇西人,教授,博士.Email:yzztianyu@126.com
  • 基金资助:
    国家重点研发计划项目(2019YFD1101003),甘肃省科技计划项目(25JRRA114),甘肃省建设科技科研项目(JK2022-06)

Analysis ofmechanical behavior of bucklingrestrained brace with ductile casting connectors under cyclic loadings

YIN Zhan-zhong1,2, YANG Yong-an1, ZHANG Su-feng1   

  1. 1. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
    2. Western Engineering Research Center of Disaster Mitigation in Civil Engineering of Ministry of Education, Lanzhou University of Technology, Lanzhou 730050, China
  • Received:2022-01-03 Online:2025-06-28 Published:2025-06-30

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摘要： 中心支撑钢框架中支撑与框架梁柱连接时,节点区域容易发生三轴应力场而导致脆性破坏.为此,用延性铸造连接件代替节点板和梁柱连接,对不同参数带延性铸造连接件的防屈曲支撑在循环荷载下的受力性能进行模拟分析,研究该类型防屈曲支撑的破坏模式、滞回曲线与耗能性能;分析延性铸造件耗能段长度、耗能板和加劲肋对该类型防屈曲支撑性能的影响.结果表明:该类型支撑受力时,铸造连接件耗能段率先屈服,随着荷载增加,支撑内核管进入塑性阶段,与铸造连接件共同耗能;带延性铸造连接件的防屈曲支撑滞回曲线饱满、对称,具有良好的耗能能力.

关键词: 延性铸造件, 防屈曲支撑, 有限元分析, 循环荷载

Abstract: When the braces in the centrally braced steel frame are connected with the beam-column of the frame, the triaxial stress field is easy to occur in the joint area, which leads to brittle failure. To address this issue, ductile casting connectors are used instead of nodal plates and beam-column connections and conducts numerical simulations to analyze the mechanical performance of buckling-restrained braces (BRBs) with ductile cast connections under cyclic loading. The failure mode, hysteretic curve, and energy dissipation of of these BRBs were analyzed. Additionally, the effects of the length of energy-dissipating section, energy dissipation plate, and stiffener of ductile castings on the performance of BRBs are analyzed. The results indicate that, under loading, the energy-dissipating segment of the cast connection is the first to yield.. With the increase of load, the supporting core tube enters into the plastic stage and consume energy together with the casting connector. The hysteretic curves of BRBs with ductile casting connector exhibit a stable and symmetrical shape, demonstrating excellent energy dissipation capacity.

Key words: ductile casting, buckling-restrained brace, finite element analysis, cyclic load

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