高铁大跨连续梁不同约束体系下抗震性能研究<sup>*</sup>

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (1000 KB) HTML (0 KB)
Export: BibTeX | EndNote (RIS)

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

Received: 08 March 2024

PACS:

U442.55

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	ZHOU Youquan

Cite this article:

ZHOU Youquan. Study on Seismic Performance of High-speed Railway Long-span Continuous Beam Bridges with Different Constraint Systems[J]. Journal of Railway Engineering Society, 2024, 41(6): 57-63.

URL:

https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/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].