[1]宗周红,邓江东,黎雅乐,等.粘钢加固损伤混凝土箱型桥墩的抗震性能Ⅰ:双向拟静力试验[J].东南大学学报(自然科学版),2013,43(5):944-951.[doi:10.3969/j.issn.1001-0505.2013.05.008]
 Zong Zhouhong,Deng Jiangdong,Li Yale,et al.Anti-seismic properties of damaged concrete bridge piers with hollow box-section strengthened with adhering steel plates Ⅰ: bi-directional quasi-static test[J].Journal of Southeast University (Natural Science Edition),2013,43(5):944-951.[doi:10.3969/j.issn.1001-0505.2013.05.008]
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粘钢加固损伤混凝土箱型桥墩的抗震性能Ⅰ:双向拟静力试验()
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《东南大学学报(自然科学版)》[ISSN:1001-0505/CN:32-1178/N]

卷:
43
期数:
2013年第5期
页码:
944-951
栏目:
交通运输工程
出版日期:
2013-09-20

文章信息/Info

Title:
Anti-seismic properties of damaged concrete bridge piers with hollow box-section strengthened with adhering steel plates Ⅰ: bi-directional quasi-static test
作者:
宗周红1邓江东2黎雅乐1刘爱荣2
1东南大学土木工程学院, 南京 210096; 2广州大学土木工程学院, 广州 510006
Author(s):
Zong Zhouhong1 Deng Jiangdong2 Li Yale1 Liu Airong2
1School of Civil Engineering, Southeast University, Nanjing 210096, China
2School of Civil Engineering, Guangzhou University, Guangzhou 510006, China
关键词:
钢筋混凝土箱型桥墩 粘钢加固 双向拟静力试验 抗震性能 初始损伤
Keywords:
reinforced concrete bridge piers with hollow box-section strengthening with adhering steel plates bi-directional quasi-static test anti-seismic properties initial damage
分类号:
U443.22;TU375.3
DOI:
10.3969/j.issn.1001-0505.2013.05.008
摘要:
设计制作了11个钢筋混凝土箱型截面桥墩缩尺模型,对其进行了粘钢加固后的双向拟静力试验,分析了加固桥墩的荷载-位移滞回曲线、骨架曲线、延性能力、刚度退化和耗能能力等.结果表明,加固墩柱均发生以弯曲破坏为主的延性破坏,破坏塑性铰由未加固时的墩底上移至加固钢板位置的上边缘,加固后墩柱各项抗震性能良好,表明粘钢加固损伤桥墩是一种有效的抗震加固方式.墩柱强轴方向的滞回环饱满,承载力和刚度较大;弱轴方向的滞回环捏缩效应显著,耗能能力较强.初始损伤程度仅对粘钢加固墩柱的刚度退化及耗能能力具有一定影响.随着轴压比的增大,加固试件的承载力变大,极限变形能力降低,延性能力和耗能能力均增强.而随着长细比的减小,加固试件的承载力变大,极限变形能力降低,刚度退化情况严重.
Abstract:
11 scaled models of reinforced concrete bridge piers with hollow box-section were designed and fabricated in the lab. Bi-directional quasi-static tests for these scaled pier models strengthened with adhering steel plates were carried out. Several seismic performance indicators, such as load-displacement hysteretic and skeleton curves, ductility, degradation of rigidity, and energy dissipation were investigated. The experimental results show that all the strengthened piers present typical flexural failure modes, and plastic hinge appears in the superior margin of steel plates in stead of in the bottom for piers without strengthening. The improvement of anti-seismic properties exhibits that it was an effective method to change the plastic hinge position by adhering steel plates. The load capacity and the lateral rigid along the strong axis direction are greater, while the energy dissipation along the weak axis direction is stronger. The hysteretic curves of the weak axis exhibit notable pinch effects. The initial damage only has small effect on the degradation of rigidity and energy dissipation of the strengthening piers. Meanwhile, the changes of axial compression ratio and slenderness ratio have a great impact on the seismic performance. With the increase of the axial compression ratio, the carrying capacity, the ductility performance and energy dissipation of models increase, but the ultimate displacement decreases. With the decrease of the slenderness ratio, the carrying capacity of piers strengthened with adhering steel plates increases; however the ultimate deformation capacity decreases, while the degradation of rigidity becomes more serious.

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相似文献/References:

[1]邓江东,宗周红,黎雅乐,等.粘钢加固损伤混凝土箱型桥墩的抗震性能Ⅱ:动力响应数值分析[J].东南大学学报(自然科学版),2013,43(6):1280.[doi:10.3969/j.issn.1001-0505.2013.06.028]
 Deng Jiangdong,Zong Zhouhong,Li Yale,et al.Anti-seismic properties of damaged concrete bridge piers with hollow cross-section strengthened with adhering steel platesⅡ: numerical analysis on seismic dynamic responses[J].Journal of Southeast University (Natural Science Edition),2013,43(5):1280.[doi:10.3969/j.issn.1001-0505.2013.06.028]

备注/Memo

备注/Memo:
作者简介: 宗周红(1966—),男,博士,教授,博士生导师, zongzh@seu.edu.cn.
基金项目: “十二五”国家科技支撑计划资助项目(2011BAK02B03)、教育部博士点基金资助项目(20110092110011)、国家自然科学基金资助项目(51308137)、广东省科技计划资助项目(2012B040302005)、广州市科技计划重大专项资助项目(2011Y2-00006)、广州市属高校科研资助项目(10A005).
引文格式: 宗周红,邓江东,黎雅乐,等.粘钢加固损伤混凝土箱型桥墩的抗震性能Ⅰ:双向拟静力试验[J].东南大学学报:自然科学版,2013,43(5):944-951. [doi:10.3969/j.issn.1001-0505.2013.05.008]
更新日期/Last Update: 2013-09-20