30t轴重重载铁路简支梁桥-轨道系统地震响应研究

PDF(4533 KB)

振动与冲击 ›› 2017, Vol. 36 ›› Issue (3) : 189-195.

论文

闫斌1,2，潘文彬1，刘施1，戴公连1,2，魏标1.2

作者信息 +

Seismic responses of a 30 t axle weight havey loaded railway simply-supported bridges-tracks system

YAN Bin1,2,PAN Wenbin1, LIU Shi1,DAI Gonglian1,2,WEI Biao1,2

Author information +

文章历史 +

摘要

为研究多跨30t轴重重载铁路简支梁桥-轨道系统地震响应规律，采用经过验证的梁轨相互作用模拟方法，建立了考虑桩-土共同作用、桥墩弹塑性变形、滑动支座摩阻力、线路非线性阻力的多跨重载铁路简支梁桥与双线有砟轨道相互作用仿真模型，揭示了一致激励和行波效应下重载铁路简支梁桥-轨道系统地震响应规律，探讨了路基段钢轨长度、简支梁跨数、跨度、线路纵向阻力形式、滑动支座摩阻系数等设计参数的影响，分析了温度、列车制动和地震耦合作用下系统的受力特征。研究表明：当地形地质条件相差不大时，简支梁跨数可简化为11跨、路基段钢轨长度可取为150m；线路阻力减小时，梁体间、梁体与桥台间可能出现碰撞现象甚至发生落梁；纵向一致激励下，钢轨应力包络图呈“双菱形”，其最大值出现在桥台附近，而梁缝附近梁轨相对位移较大，易发生动力失稳；行波效应下，系统受力和变形规律发生显著改变，即使对于跨度较小的简支梁桥，也应考虑行波效应的影响；温度和列车制动作用将进一步增大轨道结构在地震中发生动力失稳的可能性。

Abstract

In order to study seismic responses of a multi-span heavy loaded railway simply-supported bridges- tracks system, the validated bridge-track interaction analysis method was used to establish the simulation model of interaction between heavy loaded railway simply-supported bridges and double ballast tracks considering pile-soil interaction, pier elastic-plastic deformation, sliding bearing friction and track nonlinear resistance. The study revealed the seismic response law of the heavy loaded railway simply-supported bridges and tracks system under the seismic uniform excitation and traveling wave effect. The influences of design parameters, such as, track segment length, simply-supported bridge amount, span length, track longitudinal resistance form and sliding bearing friction coefficient were discussed. The stress characteristics of the system under the coupling effects among temperature, train brake and earthquake were analyzed. The results showed that when the geological conditions are similar, simply-supported bridges can be reduced to 11 spans and 150 m is taken as the length of track segment on embankment; when the track resistance decreases, both collision and beam falling may occur between beams and between abutment and beam; under longitudinal uniform excitation, the track stress envelope shape is a “double-diamond” with its maximum value appearing near the abutment, and the dynamic instability may occur due to larger track-bridge relative displacements near beam gaps; under the traveling wave effect, the stress and deformation laws of the system change significantly, so it is necessary to consider the effect of traveling wave even for smaller span simply-supported bridges; temperature and train braking action further increase the possibility of dynamic instability of the system under earthquakes. 

导出引用

闫斌1,2，潘文彬1，刘施1，戴公连1,2，魏标1.2. 30t轴重重载铁路简支梁桥-轨道系统地震响应研究[J]. 振动与冲击, 2017, 36(3): 189-195

YAN Bin1,2,PAN Wenbin1, LIU Shi1,DAI Gonglian1,2,WEI Biao1,2. Seismic responses of a 30 t axle weight havey loaded railway simply-supported bridges-tracks system[J]. Journal of Vibration and Shock, 2017, 36(3): 189-195

参考文献

[1] Qing Wu, Shihui Luo, Cole Colin. Longitudinal dynamics and energy analysis for heavy haul trains [J]. Journal of Modern Transportation, 2014, 22(3): 127-136.
[2] 杨德修. 重载铁路轨道技术发展方向研究 [J]. 铁道工程学报, 2012(2): 41-44.
Yang Dexiu. Research on Development Direction of Track Technology of Heavy-haul Railway [J]. Journal of Railway Engineering Society, 2012(2): 41-44 (in Chinese).
[3] 戴福忠, 陈雅兰. 重载铁路桥梁设计列车标准活载的研究 [J]. 中国铁道科学, 2004, 25(4): 81-86.
Dai Fuzhong, Chen Yalan. Study on the Standard Live Load of a Train for the Design of Heavy Load Railway Bridge [J]. China Railway Science, 2004, 25(4): 81-86 (in Chinese).
[4] 王丽, 张玉玲. 新建重载铁路桥梁设计荷载标准的研究 [J]. 土木工程学报, 2013,46(3):103-109.
Wang Li, Zhang Yuling. Study on the Design Load Model for New Heavy Haul Railway Bridges [J]. China Civil Engineering Journal, 2013, 46(3):103-109 (in Chinese).
[5] 戴公连, 朱俊樸, 闫斌. 重载列车与既有铁路简支梁桥的适应性研究 [J]. 铁道科学与工程学报, 2014. 11(2): 7-13.
Dai Gonglian, Zhu Junpu, YAN Bin. The adaptability research of heavy haul trains and existing railway simply-supported bridge [J]. Journal of Railway Science and Engineering, 2014.11(2): 7-13 (in Chinese).
[6] 余志武, 李进洲, 宋力. 疲劳荷载后重载铁路桥梁剩余静载承载力试验研究 [J]. 铁道学报, 2014,36(4):76-85.
Yu Zhiwu, Li Jinzhou, Song Li. Experimental Study on Post-cyclic-loading Residual Static Bearing Capacity of Heavy-haul Railway Bridges [J]. Journal of the China Railway Society, 2014, 36(4):76-85 (in Chinese).
[7] 戴公连, 朱俊樸, 闫斌. 30t轴重重载铁路简支梁桥上无缝线路纵向力研究 [J]. 土木工程学报, 2015,48(8):1-10.
Dai Gonglian, Zhu Junpu, Yan Bin. Longitudinal force of continuous welded rail on simply-supported bridge traveled by 30t axle load heavy haul [J]. China Civil Engineering Journal, 2015, 48(8):1-10 (in Chinese).
[8] EuroPean Committee For Standardization. BS EN 1991-2:2003 Eurocaode 1:Actions on structures-Part 2:Traffic loads on bridges[S]. 2003.
[9] TB 10015-2012 铁路无缝线路设计规范 [S]. 北京: 中国铁道出版社, 2013.
TB 10015-2012, Code for design of railway continuously welded rail [S]. Beijing: China railway publishing house, 2012 (in Chinese).
[10] UIC. UIC 774-3 Track/bridge interaction. Recommendations for calculations [S]. Paris: International Union of Railways, 2001.
[11] 戴公连, 闫斌. 高速铁路斜拉桥与无缝线路相互作用研究 [J]. 土木工程学报, 2013,46(8):90-97.
Dai Gonglian, Yan Bin. Interaction between cable-stayed bridge traveled by high-speed trains and continuously welded rail [J]. China Civil Engineering Journal, 2013.46(8): 90-97 (in Chinese).
[12] Bin Yan, Gonglian Dai. Seismic Pounding and Protection Measures of Simply-supported Beams Considering Interaction between Continuously Welded Rail and Bridge [J]. Structural Engineering International, 2013, 23(1):61-67.
[13] 中华人民共和国铁道部. GB50111-2006 铁路工程抗震设计规范 [S]. 北京: 中国计划出版社, 2006.
GB50111-2006, Code for seismic design of railway engineering [S]. Beijing: China planning press, 2006 (in Chinese).
[14] 闫斌, 戴公连. 考虑加载历史的高速铁路梁轨相互作用分析 [J]. 铁道学报, 2014,36(6):75-80.
Yan Bin, Dai Gong-lian. Analysis of interaction between continuously-welded rail and high-speed railway bridge considering loading-history [J]. Journal of the China Railway Society, 2014, 36(6): 75-80 (in Chinese).
[15] 重载铁路设计规范(征求意见稿) [S]. 北京: 中国铁道出版社, 2011.
Coding for Designing Heavy Haul Railway [S]. Beijing: China Railway Publishing House, 2011 (in Chinese).
[16] 雷俊卿, 李宏年, 冯东. 铁路桥梁列车制动力的试验研究与计算分析 [J]. 工程力学, 2006,23(3):134-140.
Lei Junqing, Li Hongnian, Feng Dong. Experimental Study and Computational Analysis on Braking Force between Running Train and Railway Bridge [J]. Engineering Mechanics, 2006, 23(3):134-140 (in Chinese).
[17] 闫斌. 高速铁路中小跨度桥梁与轨道相互作用研究 [D]. 长沙: 中南大学, 2013.
Yan Bin. Interaction between Continuously Welded Rail and Medium & Small Bridges of High-Speed Railway [D]. Changsha: Central South University, 2013 (in Chinese).