[1]李宁,王苏安,范佩东,等.空心节段预制拼装RC桥墩的多维抗震性能试验研究[J].地震工程与工程振动,2022,42(06):076-85.[doi:10.13197/j.eeed.2022.0608]
　LI Ning,WANG Suan,FAN Peidong,et al.Experimental study on multi-dimensional seismic performance of rectangular hollow section precast segmental RC bridge column[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2022,42(06):076-85.[doi:10.13197/j.eeed.2022.0608]
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空心节段预制拼装RC桥墩的多维抗震性能试验研究
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《地震工程与工程振动》[ISSN:/CN:]

卷:
42
期数:
2022年06期
页码:
076-85
栏目:
第十一届全国地震工程学术会议专题
出版日期:
2022-12-31

文章信息/Info

Title:
Experimental study on multi-dimensional seismic performance of rectangular hollow section precast segmental RC bridge column
作者:
李宁1; 2; 3;  王苏安1;  范佩东1;  张孝航1
1. 天津大学 建筑工程学院, 天津 300350;
2. 滨海土木工程结构与安全教育部重点实验室, 天津 300350;
3. 中国地震局地震工程综合模拟与城乡抗震韧性重点实验室(天津大学), 天津 300350
Author(s):
LI Ning1; 2; 3;  WANG Suan1;  FAN Peidong1;  ZHANG Xiaohang1
1. School of Civil Engineering, Tianjin University, Tianjin 300350, China;
2. Key Laboratory of Coast Civil Structure Safety, Ministry of Education, Tianjin 300350, China;
3. Key Laboratory of Earthquake Engineering Simulation and Seismic Resilience of China Earthquake Administration (Tianjin University), Tianjin 300350, China
关键词:
节段拼装桥墩; 自复位; 水平双轴加载; 抗震性能; 震后残余位移
Keywords:
prefabricated segmental pier; re-centering; horizontal biaxial loading; seismic performance; seismic residual displacement
分类号:
TU997U442.5+5
DOI:
10.13197/j.eeed.2022.0608
摘要:
随着时代的发展和社会的进步，预制拼装技术可提高桥梁建造效率、降低环境影响。预制拼装桥墩同时具备良好的自复位能力，且震后残余位移小。文中设计了新型空心节段预制拼装RC桥墩，通过水平双轴拟静力试验，对节段拼装桥墩在多维耦合作用下的抗震性能进行研究。采用矩形加载路径，对空心节段拼装桥墩的水平的损伤特征、节间接缝开合、水平力-位移关系、预应力下降、刚度退化等进行分析，阐明了空心节段预制RC桥墩的破坏机理，研究了新型桥墩的抗震性能。结果表明：多向耦合水平作用使构件边角破坏严重，加载路径对节段拼装桥墩的耗能能力、自复位能力等都产生重要影响。底部节段在加载位移角达1.5%时混凝土剥落较多，在3.5%的位移角下耗能钢筋拉断，且双向残余位移角可达1.98%和1.42%。双向加载RC墩自复位能力下降严重，可能导致韧性不足。本研究结果为空心节段拼装桥墩的设计和地震区应用提供依据和理论支撑。
Abstract:
With the development progress of society and economy, the prefabricate technology increases the efficiency of bridge construction, and reduces the pollution to environment. While the prefabricated pier has good self-recentering ability with small residual displacement after earthquake events. In this study, a new hollow section precast segmental RC pier is designed. The pier subjected to multi-dimensional horizontal seismic effects is studied through dual axial horizontal quasi-static experimental test. With rectangular loading pattern, the damage evolution charactersitics, joint opening and closing, horizontal force-displacement response, prestress force drop, horizontal stiffness degradation of the segmental piers was analyzed. The damage mechanism of hollow segmental prefabricated RC piers was presented, and the seismic performance of new piers was studied. It is concluded that the multi-directional coupling of the horizontal action led to the element corner damage seriously. The loading path has an important impact on the energy dissipation capacity, self-resetting capacity, and other characteristics of segmental assembled piers. The bottom segment has more concrete spalling with a loading drift ratio up to 1.5%, and the energy dissipation reinforcement cracked with a drift ratio of 3.5% and a residual deformation drift of 1.98% and 1.42% on the two directions, respectively. The self-centering capacity of the pier subjected to bi-directional loading is severely reduced, which may result in inadequate resilience. This study provides a theoretical basis for the design and application of hollow segmental piers in seismic zone.

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备注/Memo

备注/Memo:
收稿日期:2022-07-11;改回日期:2022-10-11。
基金项目:国家重点研发计划项目(2019YFE0112500);国家自然科学基金面上项目(52178496,51678407)
作者简介:李宁(1981-),男,教授,博士,主要从事工程抗震减振控制方面的研究.E-mail:neallee@tju.edu.cn
更新日期/Last Update: 1900-01-01