[1]陈梦圆,贾俊峰,程寿山,等.不锈钢筋-FRP筋混合配筋预制节段桥墩抗震性能研究[J].西安建筑科技大学学报(自然科学版),2023,55(03):368-379.[doi:10.15986/j.1006-7930.2023.03.007 ]
　CHEN Mengyuan,JIA Junfeng,CHENG Shoushan,et al.Study on seismic performance of precast segmental pier columns with stainless steel and FRP reinforcements[J].J. Xi'an Univ. of Arch. & Tech.(Natural Science Edition),2023,55(03):368-379.[doi:10.15986/j.1006-7930.2023.03.007 ]
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不锈钢筋-FRP筋混合配筋预制节段桥墩抗震性能研究()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
55
期数:
2023年03期
页码:
368-379
栏目:
出版日期:
2023-06-28

文章信息/Info

Title:
Study on seismic performance of precast segmental pier columns with stainless steel and FRP reinforcements
文章编号:
1006-7930(2023)03-0368-12
作者:
陈梦圆1; 贾俊峰1; 程寿山2; 周述美3; 庞 伟4
(1.北京工业大学 城市与工程安全减灾教育部重点实验室, 北京 100124; 2.旧桥检测与加固交通行业重点实验室(北京), 北京 100088; 3.中国建筑第八工程局有限公司, 上海 200112; 4.中国市政工程西北设计研究院有限公司, 甘肃 兰州 730099)
Author(s):
CHEN Mengyuan1;  JIA Junfeng1;  CHENG Shoushan2;  ZHOU Shumei3;  PANG Wei4
(1.Key Laboratory of Urban and Engineering Safety and Disaster Reduction, Ministry of Education, Beijing University of Technology, Beijing 100124,China; 2.Key Laboratory of Bridge Detection and Reinforcement Technology of the Ministry of Communications(Beijing), Beijing 100088,China; 3.China Construction Eighth Engineering Bureau Co., Ltd., Shanghai 200112, China; 4.China Municipal Engineering Northwest design and Research Institute Co., Ltd., Lanzhou 730099,China)
关键词:
预制节段拼装桥墩;  GFRP筋;  不锈钢筋;  无粘结段长度;  抗震性能
Keywords:
precast segmental pier column;  GFRP reinforcement;  stainless steel reinforcement;  length of unbonded section;  seismic performance
分类号:
TU443.2
DOI:
10.15986/j.1006-7930.2023.03.007
文献标志码:
A
摘要:
为解决沿海环境中钢筋易锈蚀的问题,结合节段拼装桥墩的快速建造技术,设计了一种配置2304不锈钢筋和GFRP筋的混合配筋形式的节段预制拼装桥墩.通过ABAQUS有限元软件建立了混合配筋桥墩的数值仿真模型,分析了其在低周往复荷载作用下的滞回性能,并通过与试验结果对比验证了有限元模型的正确性.采用该有限元模型进一步探究了GFRP筋的无粘结段长度比例、轴压比、剪跨比对节段拼装桥墩抗震性能的影响.数值计算结果表明:随着GFRP筋无粘结段长度减小,节段拼装桥墩的承载力提高.无粘结段长度越长,GFRP筋的局部应力越小,位移延性越好,但是墩柱的耗能变小.建议GFRP筋的无粘结段长度在40%～80%之间,以保证桥墩具备良好的抗震性能,避免GFRP筋应力集中发生突然断裂.通过增加轴压比,试件承载力增幅不明显; 试件剪跨比从4.5增大为9.5,试件水平承载力降低63%.为后续后张预应力混合配筋桥墩的抗震性能试验研究奠定基础.
Abstract:
In order to solve the problem that reinforcement is easy to rust in coastal environment, combined with the rapid construction technology of segmental assembled pier, a segmental prefabricated assembled pier with 2304 stainless steel reinforcement and GFRP reinforcement is designed. The numerical simulation model of hybrid reinforced pier is established by ABAQUS finite element software, and its hysteretic performance under low cyclic load is analyzed. The finite element model, the correctness of which is verified by comparing with the test results, is used to further explore the effects of unbonded section length, axial compression ratio and shear span ratio of GFRP reinforcement on the seismic performance of segmental assembled piers. The numerical results show that the bearing capacity of segmental assembled piers increases with the decrease of the length of unbonded GFRP reinforcement. The longer the length of unbonded section, the smaller the local stress of GFRP reinforcement and the better the displacement ductility, but the energy consumption of pier column becomes smaller. It is suggested that the length of unbonded section of GFRP reinforcement should be between 40%～80%, so as to ensure that the pier has good seismic performance and avoid sudden fracture due to stress concentration of GFRP reinforcement. By increasing the axial compression ratio, the increase of the bearing capacity of the specimen is not obvious; the shear span ratio of the specimen increases from 4.5 to 9.5, and the horizontal bearing capacity of the specimen decreases by 63%. This study lays a foundation for the subsequent experimental study on the seismic performance of post tensioned prestressed composite reinforced piers.

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备注/Memo

备注/Memo:
收稿日期:2022-01-17修回日期:2023-05-11
基金项目:国家国际科技合作专项基金资助(2019YFE0119800),北京市自然科学基金项目(8202002),旧桥检测与加固交通行业重点实验室(北京)开放课题基金资助(2020-JQKFKT-7)
第一作者:陈梦圆(1997—),女,硕士生,主要从事桥梁抗震方面的研究. E-mail:cmy971024@163.com
通信作者:贾俊峰(1982—),男,博士,教授,主要从事桥梁抗震方面的研究. E-mail:jiajunfeng@bjut.edu.cn
更新日期/Last Update: 2023-06-28