[1]谢鲁齐,吴京,章锦洋,等.基于可更换耗能连接的装配式混凝土梁柱节点力学性能试验研究[J].东南大学学报(自然科学版),2021,(1):1-8.[doi:10.3969/j.issn.1001-0505.2021.01.001]
 Xie Luqi,Wu Jing,Zhang Jinyang,et al.Experimental study on mechanical property of precast concrete frame with replaceable energy dissipation connectors[J].Journal of Southeast University (Natural Science Edition),2021,(1):1-8.[doi:10.3969/j.issn.1001-0505.2021.01.001]
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基于可更换耗能连接的装配式混凝土梁柱节点力学性能试验研究()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
期数:
2021年第1期
页码:
1-8
栏目:
土木工程
出版日期:
2021-01-20

文章信息/Info

Title:
Experimental study on mechanical property of precast concrete frame with replaceable energy dissipation connectors
作者:
谢鲁齐吴京章锦洋刘晨昱
东南大学混凝土及预应力混凝土教育部重点实验室, 南京 211189
Author(s):
Xie Luqi Wu Jing Zhang Jinyang Liu Chenyu
Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 211189, China
关键词:
装配式混凝土框架 可更换耗能连接组件 震后修复性能 低周疲劳能力 滞回性能
Keywords:
precast concrete frame replaceable energy dissipation connector seismic rehabilitation low-cycle fatigue capacity hysteretic property
分类号:
TU375.4
DOI:
10.3969/j.issn.1001-0505.2021.01.001
摘要:
为提高结构的震后修复效率和修复后工作性能,提出一种带有可更换耗能连接的装配式混凝土框架梁柱节点构造.将可更换耗能连接作为梁端抗弯部件和阻尼器,销轴体系作为梁端抗剪部件,进行节点试件的拟静力试验,分析其力学特性、抗震能力和修复后性能.结果表明,试件在加载过程中表现出稳定的耗能能力和高延性性能,塑性变形集中在耗能连接的核心钢板内,卸载后混凝土裂缝均可闭合.发生较大转角位移时,试件可保持稳定的承载能力,其失效模式为核心钢板中部的疲劳断裂.更换核心钢板后试件的弹性刚度、滞回性能和延性等与初始工况一致,混凝土部件仍保持弹性,表明节点的震后修复性能良好.所提出的节点构造可应用于高烈度区域,使结构在强震后快速恢复承载能力和使用功能.
Abstract:
A type of precast concrete frame beam-column joint with replaceable energy-dissipation connectors was proposed for improving the rehabilitation efficiency and rehabilitation property of structures. The replaceable energy dissipation connectors were assembled as the moment resisting components at the beam end and the dampers. The pin shaft system was regarded as the shear force resisting components of the beam end. The pseudo-static experiments of the joint specimen were conducted to analyze the mechanism property, the seismic capacity and the rehabilitation performance. The results show that the specimen exhibits stable energy dissipation capacity and high ductility property. The plastic deformation is concentrated on the core plates of the energy-dissipation connectors, while the cracks on the concrete can close after unloading. The stable load-carrying capacity can be obtained under a large drift. The failure mode is the fatigue fracture in the middle of the core member of the connectors. After the replacement of the core plates, the initial stiffness, the hysteretic property and the ductility of the specimen were consistent with those under the initial condition. The concrete members remain elastic as before, revealing good seismic rehabilitation property. The proposed beam-column joint can be used in high-seismic zones, which can help the structures recover the bearing capacity and normal function after strong earthquakes.

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备注/Memo

备注/Memo:
收稿日期: 2020-07-07.
作者简介: 谢鲁齐(1988—),男,博士;吴京(联系人),男,博士,教授,博士生导师,seuwj@seu.edu.cn.
基金项目: 国家自然科学基金资助项目(51978165)、国家重点研发计划资助项目(2019YFC1509305、2016YFC0701403).
引用本文: 谢鲁齐,吴京,章锦洋,等.基于可更换耗能连接的装配式混凝土梁柱节点力学性能试验研究[J].东南大学学报(自然科学版),2021,51(1):1-8. DOI:10.3969/j.issn.1001-0505.2021.01.001.
更新日期/Last Update: 2021-01-20