高铁大跨连续梁不同约束体系下抗震性能研究<sup>*</sup>

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (1000 KB) HTML (0 KB)
输出: BibTeX | EndNote (RIS)

摘要 研究目的： 为研究不同抗震约束体系对高速铁路大跨度连续梁桥纵向抗震性能的影响,以一座跨径为(60+100+60)m的高速铁路连续梁桥为工程背景,采用OpenSees软件对全桥进行非线性时程分析,针对不同的设防烈度,从动力特性、桥墩墩底弯矩、墩顶位移、支座位移等方面,对比分析延性体系、减隔震体系以及延性体系加减隔震体系多种工况下桥梁的地震响应差别。
研究结论： （1）与延性体系相比,减隔震体系可显著延长桥梁结构的自振周期;（2）对于墩高20 m的高铁大跨连续梁按罕遇地震设防时,在Ⅶ度区及以上设防烈度时,桥墩会进入延性,且位移延性系数随着桥墩配筋率的增大而减小;（3）采用延性抗震体系的高铁大跨连续梁,可通过增大配筋率和设置阻尼器减轻桥墩的损伤,使其处于轻微损伤状态;（4）采用减隔震体系可保证高烈度地震区的高铁大跨连续梁桥的桥墩在罕遇地震下处于弹性工作状态,结构的减震率可超过80%;（5）摩擦摆支座体系减震效果好,但需要通过附加阻尼的形式来满足支座设计位移需要;（6）本研究成果可为高铁大跨连续梁桥的抗震设计提供参考。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	周友权

关键词 ：高速铁路桥梁, 抗震性能, 数值计算, 连续梁桥, 延性体系, 减隔震体系

Abstract：Research purposes: In order to investigate the influence of different constraint systems on the seismic performance of high-speed railway long-span continuous beam bridges under longitudinal loading, a high-speed railway continuous beam bridge with span of (60+100+60) m was taken as engineering prototype. The nonlinear time-history analyses of the whole bridges were performed by OpenSees software for different fortification intensity. The seismic response of the bridge with ductility system, isolation system and attached liquid viscous damper were analyzed from the different aspects including dynamic characteristics, bottom bending moment, top displacement of columns and bearing displacement.
Research conclusions: (1)The isolation system significantly increases the natural vibration period of the bridge compared with the ductility system. (2) For the high-speed railway long-span continuous beam with a pier height of 20 m, when the fortification intensity is in the Ⅶ degree area and above, the pier will enter the ductility, and the displacement ductility coefficient decreases with the increase of the reinforcement ratio of the pier.(3) The long-span continuous beam of high-speed railway in ductile seismic system can reduce the damage of bridge piers by increasing the reinforcement ratio and setting dampers, so that it is in a slight damage state.(4) The seismic isolation system can ensure that the piers of high-speed railway long-span continuous girder bridges in high-intensity seismic areas are in elastic working state under rare earthquakes, and the seismic reduction rate of the structure can exceed 80 %.(5) The friction pendulum bearing system has good damping effect, but it needs to meet the needs of bearing design displacement through additional damping.(6) The research results can provide reference for the seismic design of high-speed railway long-span continuous beam bridge.

Key words： high-speed railway bridge seismic performance numerical simulation continuous beam bridge ductility system isolation system

收稿日期: 2024-03-08

PACS:

U442.55

作者简介: ^**周友权,1979年出生,男,正高级工程师。

引用本文:

周友权. 高铁大跨连续梁不同约束体系下抗震性能研究^*[J]. 铁道工程学报, 2024, 41(6): 57-63.
ZHOU Youquan. Study on Seismic Performance of High-speed Railway Long-span Continuous Beam Bridges with Different Constraint Systems. Journal of Railway Engineering Society, 2024, 41(6): 57-63.

链接本文:

https://tdgcxb.crec.cn/CN/ 或 https://tdgcxb.crec.cn/CN/Y2024/V41/I6/57

[1]	GB 50111—2006, 铁道工程抗震设计规范(2009年版)[S].GB 50111—2006, Code for Seismic Design of Railway Engimeering (Eidition2009)[S].
[2]	禚一, 王菲. 罕遇地震下城际铁路连续梁桥延性抗震设计[J]. 铁道工程学报, 2012(4): 66-71.Zhuo Yi, Wang Fei.Seismic Ductility Design for Intercity Railway Continuous Bridge under Rare Earthquake[J]. Journal of Railway Engineering Society, 2012(4): 66-71.
[3]	夏修身, 陈兴冲. 客运专线桥梁基于性能的抗震设计研究[J]. 世界地震工程,2010(1): 40-46.Xia Xiushen, Chen Xingchong.Performance-based Seismic Design for Passenger Delicated Railway Bridge[J]. World Earthquake Engineering, 2010(1): 40-46.
[4]	韩兴, 李鑫, 向宝山, 等. 基于IDA方法的高速铁路连续梁桥易损性分析[J]. 公路交通科技, 2016(2): 54-59.Han Xing, Li Xin, Xiang Baoshan, etc. Analysis of Seismic Fragility of High Speed Railway Continuous Beam Bridge Based on IDA Method[J]. Journal of Highway and Transportation Research and Development, 2016(2): 54-59.
[5]	陈杰. 八度地震区铁路大跨度连续梁桥减隔震设计[J]. 铁道建筑, 2022(1): 83-86.Chen Jie.Seismic Isolation Design of Railway Long Span Continuous Girder Bridge in 8-Degree Earthquake Area[J]. Railway Engineering, 2022(1): 83-86.
[6]	李晓波. 高速铁路连续梁桥纵向减震装置机理性研究[J]. 铁道工程学报, 2017(12): 50-56.Li Xiaobo.Research on the Mechanism of Longitudinal Seismic Mitigation Devices for High-speed Railway Continuous Bridges[J]. Journal of Railway Engineering Society, 2017(12): 50-56.
[7]	冯亚成. 高速铁路大跨连续梁桥减隔震方案讨论[J]. 地震研究, 2015(1): 167-172.Feng Yacheng.Discussion on Seismic Mitigation and Isolation Schemes for High-speed Railway Large-span Continuous Girder Bridges[J]. Journal of Seismological Research, 2015(1): 167-172.
[8]	杨得旺. 高速铁路钢混连续梁桥弹性约束体系抗震性能研究[J]. 铁道建筑, 2022(12): 129-133.Yang Dewang.Study on Seismic Performance of Elastic Restraint System of High Speed Railway Steel-concrete Continuous Girder Bridge[J]. Railway Engineering, 2022(12): 129-133.
[9]	陈列, 胡京涛. 桥梁减隔震技术[M]. 北京: 中国铁道出版社, 2014.Chen Lie, Hu Jingtao.Seismic Isolation Technology of Bridge[M]. Beijing: China Railway Publishing House, 2014.
[10]	McKenna F, Scott MH, Fenves GL. Nonlinear Finite-element Analysis Software Architecture Using Object Composition[J]. Journal of Computing in Civil Engineering, 2010(1): 95-107.
[11]	TB 10093—2017, 铁路桥涵地基和基础设计规范[S].TB 10093—2017, Code for Design on Subsoil and Foundation of Railway Bridge and Culvert[S].