[1]毛晨曦,于樵,张昊宇,等.预应力自复位钢筋混凝土柱及梁柱节点拟静力试验研究[J].自然灾害学报,2017,(06):001-12.[doi:10.13577/j.jnd.2017.0601]
 MAO Chenxi,YU Qiao,ZHANG Haoyu,et al.Pseudo-static tests of prestressed self-centering reinforced concrete column and beam-column joints[J].,2017,(06):001-12.[doi:10.13577/j.jnd.2017.0601]
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预应力自复位钢筋混凝土柱及梁柱节点拟静力试验研究
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《自然灾害学报》[ISSN:/CN:23-1324/X]

卷:
期数:
2017年06期
页码:
001-12
栏目:
出版日期:
2017-12-08

文章信息/Info

Title:
Pseudo-static tests of prestressed self-centering reinforced concrete column and beam-column joints
作者:
毛晨曦1 于樵1 张昊宇1 王振营2 曲博闻1
1. 中国地震局工程力学研究所, 中国地震局地震工程与工程振动重点实验室, 黑龙江 哈尔滨 150080;
2. 哈尔滨工业大学 土木工程学院, 黑龙江 哈尔滨 150090
Author(s):
MAO Chenxi1 YU Qiao1 ZHANG Haoyu1 WANG Zhenying2 QU Bowen1
1. Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin 150080, China;
2. School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China
关键词:
预应力自复位角钢轴压比抗震性能
Keywords:
prestressself-centeringangle steelaxial compression ratioseismic behaviors
分类号:
TU37;TU317.1;X9
DOI:
10.13577/j.jnd.2017.0601
摘要:
装配式预应力自复位钢筋混凝土结构在地震后构件无损伤或损伤很小,可尽快恢复使用功能,大大降低震后经济损失,从而得到研究者的广泛关注。在以往的装配式预应力自复位钢筋混凝土结构中,节点上的外置阻尼器多选用小型防屈曲支撑,费用较高。本文提出在柱-基础节点及梁柱节点中,用价格低廉且同样具有较好耗能能力的普通角钢替代作为阻尼器,开展了拟静力试验。以往同类型构件试验仅关注试件在单向荷载作用下的性能,本试验同时研究了构件在阻尼器工作的垂直方向上构件的力学性能。文中共进行了两组试验,一组针对自复位柱-基础节点,研究构件加载方向、轴压比、极限位移等因素对构件性能的影响;另一组针对自复位梁-柱节点,研究柱轴压比、极限位移对构件性能的影响。试验结果表明:加载到最大层间位移角为1/15时,试件无明显破坏,预应力钢绞线保持在弹性阶段,始终能够提供恢复力;外置角钢产生弹塑性变形耗散能量,试件耗能能力较好。卸载后,残余变形很小,可以在震后方便地更换外置角钢。
Abstract:
There is no damage or slight damage for the assembled prestressed self-centering reinforced concrete structure after earthquakes. So the structure can be used as soon as possible and economic losses are greatly reduced. This kind of structure was widely concerned by researchers. Small buckling restrained braces (BRB) were often chosen as dampers at the nodes of these structures. The costs are relatively high. In this study, common used angle steel was used as dampers at the nodes of the structure to replace the small BRBs, which has much lower costs but alike energy dissipation ability. Experiments for the components with such nodal dampers were carried out. Different with previous similar tests, the behavior of the components at the direction that is perpendicular with the working direction of the dampers were also tested. The tests for two kinds of specimens were performed. One was node connecting self-centering column and foundation, the other was node connecting column and beam. The influence of factors including loading direction, axial compression ratio and ultimate displacement on behavior of the first kind of specimen was addressed. For the second kind of specimen, only the influence of axial compression ratio and ultimate displacement was tested. The experimental results show that until the story drift reaches 1/15, the prestressed tendons remain elastic and provide the resilience all the time, the components have good self-centering ability. The connections dissipated the energy by the elastic-plastic deformations of the angles, and they have good ability of energy dissipation. After unloading, the residual deformations of the connections are small, which shows that the angle steel can be replaced easily after the earthquake.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2017-05-17;改回日期:2017-06-01。
基金项目:中国地震局工程力学研究所基本科研业务费专项(2016D01);国家自然科学基金项目(51678543)
作者简介:毛晨曦(1974-),女,研究员,博士,主要从事结构工程抗震和通信系统地震灾害评估等方面的研究.E-mail:maochenxi@iem.ac.cn
更新日期/Last Update: 1900-01-01