装配式梁柱转动摩擦耗能节点抗震性能试验研究
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TU317+.2;TU352.11

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2019 年海南省基础与应用基础研究计划(自然科学领域)高层次人才项目基金资助项目(2019RC109);国家自然科学基金资助项目(51968020);国家重点研发计划(2019YFD1101003);海南省重点研发计划(ZDYF2020189)


Experimental study on seismic performance of prefabricated beam to column rotation friction energy dissipation connection
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    摘要:

    为了减轻传统钢框架的梁柱节点在强震作用下的损伤与破坏,提出了一种装配式梁柱转动摩擦耗能节点,阐述了该节点的构造形式与工作机理,对其进行了低周反复加载试验,系统研究了该节点的抗震性能,建立了其恢复力模型,并与试验结果进行了对比分析。研究结果表明,装配式梁柱转动摩擦耗能节点利用连接钢板与黄铜板之间的转动摩擦耗能,其滞回曲线近似为饱满的平行四边形,具有良好的耗能性能;耗能节点在循环加载下强度退化较小,力学性能很稳定;节点通过梁端的转动摩擦耗能有效控制梁柱节点的损伤,试验后梁柱节点保持为弹性,能量耗散集中在转动摩擦铰处;耗能节点的变形模式在设定的加载过程中可分为两个阶段:第一阶段为节点的弹性变形阶段;第二阶段为节点的刚体转动变形阶段。基于恢复力模型的计算结果与试验结果吻合较好,表明提出的恢复力模型能够较好地反映转动摩擦耗能节点在循环往复荷载作用下的滞回性能。

    Abstract:

    To reduce the damage of beam to column connections of traditional steel frame under strong earthquakes, a type of prefabricated beam to column energy dissipation connection based on rotational friction is proposed. Its configuration form and working mechanism are introduced. The low cycle reversed loading tests are carried out on the connection and the seismic performance of the connection is systematically studied. Also, its restoring force model is established. The research results show that the connection utilizes the rotation friction between steel plates and brass plates to dissipate energy, and its hysteretic curves are full parallelogram, confirming that the connection possesses excellent energy dissipation capacity. The strength degradation of the connection is minimal, and its mechanical performance is stable. The damage of the beam to column connection can be controlled effectively by rotational friction energy dissipation in the beam end. Under the action of low cycle reversed loading, the beam to column connection remains elastic and the energy dissipation is concentrated at the rotation friction hinge. The deformation mode of the energy dissipation connection can be divided into two stages. The first stage is the elastic deformation mechanism, while the second stage is the rigid body rotation deformation mechanism. The calculation results based on the restoring force model are in good agreement with the test results, validating that the proposed restoring force model can reasonably capture the hysteretic behavior of the energy dissipation connection under the cyclic reversed loading.

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陈云,陈超,徐子凡,禹文华.装配式梁柱转动摩擦耗能节点抗震性能试验研究[J].振动工程学报,2022,35(1):45~54.[CHEN Yun, CHEN Chao, XU Zi-fan, YU Wen-hua. Experimental study on seismic performance of prefabricated beam to column rotation friction energy dissipation connection[J]. Journal of Vibration Engineering,2022,35(1):45~54.]

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  • 在线发布日期: 2022-06-17
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