谢鲁齐, 吴京, 章锦洋, 刘晨昱. 可更换耗能连接力学机理及变形性能研究[J]. 工程力学, 2020, 37(6): 186-195. DOI: 10.6052/j.issn.1000-4750.2019.08.0475
引用本文: 谢鲁齐, 吴京, 章锦洋, 刘晨昱. 可更换耗能连接力学机理及变形性能研究[J]. 工程力学, 2020, 37(6): 186-195. DOI: 10.6052/j.issn.1000-4750.2019.08.0475
XIE Lu-qi, WU Jing, ZHANG Jin-yang, LIU Chen-yu. STUDY ON THE MECHANICAL AND DEFORMATION PROPERTIES OF REPLACEABLE ENERGY DISSIPATION CONNECTORS[J]. Engineering Mechanics, 2020, 37(6): 186-195. DOI: 10.6052/j.issn.1000-4750.2019.08.0475
Citation: XIE Lu-qi, WU Jing, ZHANG Jin-yang, LIU Chen-yu. STUDY ON THE MECHANICAL AND DEFORMATION PROPERTIES OF REPLACEABLE ENERGY DISSIPATION CONNECTORS[J]. Engineering Mechanics, 2020, 37(6): 186-195. DOI: 10.6052/j.issn.1000-4750.2019.08.0475

可更换耗能连接力学机理及变形性能研究

STUDY ON THE MECHANICAL AND DEFORMATION PROPERTIES OF REPLACEABLE ENERGY DISSIPATION CONNECTORS

  • 摘要: 提出一种安装于装配式混凝土梁柱连接部位的可更换耗能连接组件,可以诱导结构的损伤集中在连接区域,保证结构主要构件在强震下处于弹性状态,增强结构的可修复性。利用MTS力学试验机开展3个组件的试验分析,研究组件的滞回性能、耗能能力和低周疲劳性能。试验结果表明,可更换耗能连接组件的滞回性能稳定,展现出了优良的延性和低周疲劳性能。基于ABAQUS开展的组件参数化分析主要针对核心耗能部件的厚度及核心耗能部件与约束部件之间的间隙。结果表明:增加核心耗能部件的厚度会减轻结构的高阶屈曲波数,优化构件长度方向的应变分布均匀性;核心耗能部件与约束部件之间的间隙也会影响核心耗能部件的应变分布。该文分析结果表明,该可更换耗能连接可以应用于对结构延性和可恢复性要求比较高的高震区框架结构中。

     

    Abstract: A replaceable energy dissipation connector (REDC) which is assembled in the beam end of fabricated concrete structures is proposed. The REDC can concentrate the structural damage on the beam-column connection position, prevent the main structural components from yielding and improve the seismic rehabilitation property of the structure. The experimental study on three REDC specimens are conducted through the mechanical test system, in which the hysteretic property, energy dissipation capacity and low-cycle fatigue property are analyzed. The test results reveal that the REDC specimens could perform stable hysteretic curves with a high ductility and low-cycle fatigue capacity. The parametrical analysis of the REDC specimens are conducted based on ABAQUS, in which the thickness of the core member as well as the clearance between the core member and the restrainer are chosen as the key parameters. The analysis results reveal that the buckling waves and non-uniform strain distribution amplitude are decreased with the increase of the thickness, while the clearance may also affect the strain distribution along the axial direction. As a conclusion, the REDC can be used in frames in high-seismic zones, in which high requirements of structural ductility and seismic rehabilitation are needed.

     

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