|本期目录/Table of Contents|

[1]刘德安,丁明波,鲁锦华,等.无粘结RC加固铁路重力式桥墩抗震性能试验[J].地震研究,2022,45(03):399-404.[doi:10.20015/j.cnki.ISSN1000-0666.2022.0038 ]
　LIU De'an,DING Mingbo,LU Jinhua,et al.Experimental Study on the Seismic Behaviour of the Gravity Railway Bridge Pier Strengthened with Unbonded RC[J].Journal of Seismological Research,2022,45(03):399-404.[doi:10.20015/j.cnki.ISSN1000-0666.2022.0038 ]
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无粘结RC加固铁路重力式桥墩抗震性能试验(PDF/HTML)

《地震研究》[ISSN:1000-0666/CN:53-1062/P]

卷:
45
期数:
2022年03期
页码:
399-404
栏目:
生命线工程系统抗震防灾专栏
出版日期:
2022-06-20

文章信息/Info

Title:
Experimental Study on the Seismic Behaviour of the Gravity Railway Bridge Pier Strengthened with Unbonded RC
作者:
刘德安; 丁明波; 鲁锦华; 秦训才; 郝 岩
(兰州交通大学 土木工程学院,甘肃 兰州 730070)
Author(s):
LIU De'an; DING Mingbo; LU Jinhua; QIN Xuncai; HAO Yan
(School of Civil Engineering,Lanzhou Jiaotong University,Lanzhou 730070,Gansu,China)
关键词:
拟静力试验;  铁路重力式桥墩;  抗震性能;  震后加固;  无粘结RC
Keywords:
quasi-static test;  gravity railway bridge pier;  seismic performance;  post-earthquake reinforcement;  unbonded RC
分类号:
U448.13; P315.9
DOI:
10.20015/j.cnki.ISSN1000-0666.2022.0038
摘要:
为研究无粘结RC加固受损铁路重力式桥墩的抗震性能,制作1个配筋率为0.2%的桥墩缩尺模型进行拟静力试验,破坏后采用无粘结RC进行加固。对加固前后的模型进行低周往复荷载试验,对比分析桥墩加固前后的滞回曲线、骨架曲线、刚度退化及墩顶残余位移等抗震性能指标。结果表明:采用无粘结RC进行墩底局部加固可有效地提高桥墩的耗能能力,从而避免破坏面转移至未加固区; 采用无粘结RC加固,墩顶残余位移较小,桥墩模型的强度、承载能力、刚度和位移延性系数均得到了一定程度提高,无粘结RC加固使得损伤的铁路重力式桥墩抗震性能明显提高,该加固方案对震后桥墩的修复比较有利。
Abstract:
In order to study the seismic performance of the damaged gravity bridge pier of railways strengthened by unbonded RC,a scale model of the pier with reinforcement ratio of 0.2% is made,and a pseudo-static test on the pier is carried out.Low-cycle reciprocating load tests on the model are carried out before and after reinforcement,and the seismic performance indexes of the pier before and after reinforcement,such as hysteretic curve,skeleton curve,stiffness degradation and residual displacement of pier top,are compared and analyzed.The results show that:Local reinforcement of pier bottom with unbonded RC can effectively improve the energy dissipation capacity of the pier,thus keeping the failure surface from transferring to the unreinforced area.By unbonded RC reinforcement,the residual displacement of the pier top becomes small,and the strength,bearing capacity,stiffness and displacement ductility of the pier model are improved to a certain degree.The unbonded RC reinforcement can significantly improve the seismic performance of the gravity bridge pier of railways.This approach can serve as a reference for the repair of the earthquake-damaged piers.

参考文献/References:


陈兴冲,张永亮,丁明波,等.2016.少筋混凝土重力式桥墩抗震设计方法研究[J].铁道工程学报,33(3):76-80.
丁明波.2013.铁路重力式桥墩抗震加固方法研究[D].兰州:兰州交通大学.
董旭,丁明波,刘正楠,等.2020.新型钢筋网格加固铁路重力式桥墩拟静力试验研究[J].铁道科学与工程学报,17(4):908-914.
范增昱.2012.铁路重力式桥墩外包混凝土抗震加固试验研究[D].兰州:兰州交通大学.
韩强,温佳年,杜修力,等.2015.CFRP布加固RC空心桥墩的抗震性能[J].土木工程学报,48(1):90-100.
黄海新,张望欣,程寿山,等.2020.钢筋混凝土圆截面桥墩抗震加固方式对比分析[J].世界地震工程,36(2):163-171.
鞠彦忠,阎贵平,李永哲.2004.低配筋铁路桥墩抗震性能的试验研究[J].铁道学报,26(5):91-95.
李松辉,赵国藩,王松根.2005.CFRP加固钢筋混凝土整体式板桥的受力性能研究[J].哈尔滨工业大学学报,37(2):207-211.
刘正楠.2020.既有铁路重力式桥墩预防性抗震加固方法研究[D].兰州:兰州交通大学.
鲁锦华,陈兴冲,丁明波,等.2020.少筋混凝土重力式桥墩抗震研究现状[J].世界地震工程,36(1):125-136.
鲁锦华.2020.铁路重力式桥墩抗震性能及抗震设计方法研究[D].兰州:兰州交通大学.
万世成,黄侨,关健.2019.预应力CFRP板加固钢-混凝土组合梁受弯性能试验[J].哈尔滨工业大学学报,51(3):80-87.
张鹏翔,丁明波.2013.粘钢加固重力式桥墩的抗震性能试验研究[J].兰州交通大学学报,32(1):15-19.
Park R.1989.Valuation of ductility of structures and structural assemblages from laboratory testing[J].Bulletin of the New Zealand National Society for Earthquake Engineering,22(3):155-166.
Siddika A,Mamun M,Alyousef R,et al.2019.Strengthening of reinforced concrete beams by using fiber-reinforced polymer composites:A review[J].Journal of Building Engineering,25(9):100798.
Watkins S E,Fonda J W,Nanni A.2015.Assessment of an instrumented reinforced-concrete bridge with fiber-reinforced-polymer strengthening[J].Optical Engineering,46(5):051010.
Yang L,Li Z.2013.Research on strengthening T-beam transverse connection in the highway bridge reinforcement design[C]//Second International Conference on Transportation Information and Safety,482-488.
GB 50367—2013,混凝土结构加固设计规范[S].
GB 50010—2010,混凝土结构设计规范[S].
JGJT 101—2015,建筑抗震试验方法规程[S].

备注/Memo

备注/Memo:
收稿日期:2022-01-11
基金项目:国家自然科学基金(51768036)资助.

更新日期/Last Update: 2022-07-01