大跨度重载铁路连续梁桥的小阻力扣件适应性
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摘要
为研究小阻力扣件布置方案对重载铁路连续梁桥上无缝线路纵向力分布规律的影响,采用一种经过验证的梁轨相互作用分析方法,建立考虑相邻多跨简支梁结构的30 t轴重重载铁路(60+100+60)m连续梁桥-桥上无缝线路的一体化空间有限元模型.在此基础上,对多种小阻力扣件方案进行比选,探讨了扣件阻力、下部结构刚度、荷载模式、制动力率等设计参数的影响.研究结果表明:仅在连续梁范围内铺设小阻力扣件,可在保证钢轨应力和墩顶水平力均较小的同时减小钢轨断缝值;小阻力扣件纵向阻力取值对钢轨应力的影响可达11.2%;在连续梁范围内铺设小阻力扣件后,梁轨快速相对位移成为主要控制性指标,100 m跨重载连续梁桥制动墩顶纵向刚度限值为3000 k N/cm;荷载模式和制动力率对梁轨相对位移影响较大,建议通过试验进一步明确重载列车的制动力率取值.
In order to reveal the influence of the layout of small resistance fasteners on the distribution of longitudinal force loaded on the continuously-welded rail of continuous bridge of heavy haul railway,a recognized method to analyze the rail-bridge interaction is adopted,and a spatial integrated finite element model,which takes into consideration the adjacent multi-span simply-supported beams,is established to describe the continuously-welded rail of a( 60 + 100 + 60) m continuous bridge of the heavy haul railway with an axle load of 30 t. Afterwards,based on the comparison of some layout plans of small-resistance fasteners,the influences of such design parameters as fastener resistance,substructure stiffness,loading mode and braking force ratio are discussed. The results show that( 1) when small-resistance fasteners are only laid on the continuous beam,the rail stress as well as the horizontal force at pier top is rather small,and the broken seam value of the rail can be reduced at the same time;( 2) the influence of longitudinal resistance of small-resistance fasteners on the rail stress is up to 11. 2%;( 3) when smallresistance fasteners are laid on the continuous bridge,the rapid displacement between the rail and the beam becomes the main controlling index,and the longitudinal stiffness limit at the brake pier top of a 100m-span continuous bridge reaches 3 000 k N / cm; and( 4) both the loading mode and the braking force ratio greatly influence the displacement between the rail and the beam,so that an accurate braking force ratio should be determined by tests.
In order to reveal the influence of the layout of small resistance fasteners on the distribution of longitudinal force loaded on the continuously-welded rail of continuous bridge of heavy haul railway,a recognized method to analyze the rail-bridge interaction is adopted,and a spatial integrated finite element model,which takes into consideration the adjacent multi-span simply-supported beams,is established to describe the continuously-welded rail of a( 60 + 100 + 60) m continuous bridge of the heavy haul railway with an axle load of 30 t. Afterwards,based on the comparison of some layout plans of small-resistance fasteners,the influences of such design parameters as fastener resistance,substructure stiffness,loading mode and braking force ratio are discussed. The results show that( 1) when small-resistance fasteners are only laid on the continuous beam,the rail stress as well as the horizontal force at pier top is rather small,and the broken seam value of the rail can be reduced at the same time;( 2) the influence of longitudinal resistance of small-resistance fasteners on the rail stress is up to 11. 2%;( 3) when smallresistance fasteners are laid on the continuous bridge,the rapid displacement between the rail and the beam becomes the main controlling index,and the longitudinal stiffness limit at the brake pier top of a 100m-span continuous bridge reaches 3 000 k N / cm; and( 4) both the loading mode and the braking force ratio greatly influence the displacement between the rail and the beam,so that an accurate braking force ratio should be determined by tests.
引文
[1]戴公连,朱俊樸,闫斌.大轴重重载铁路简支梁桥梁轨相互作用研究[J].桥梁建设,2014,44(5):27-32.Dai Gong-lian,Zhu Jun-pu,Yan Bin.Research of interaction between bridge and track for heavy haul railway simply-supported bridge with heavy axle-load[J].Bridge Construction,2014,44(5):27-32.
[2]Dai Gong-lian,Yan Bin.Longitudinal forces of continuously welded rail on high-speed railway cable-stayed bridge considering impact of adjacent bridges[J].Journal of Central South University,2012,19(8):2348-2353.
[3]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 load-history[J].Journal of the China Railway Society,2014,36(6):75-80.
[4]刘文硕,戴公连.大跨径无砟连续梁上小阻力扣件的适应性研究[J].华中科技大学学报:自然科学版,2013,41(7):36-41.Liu Wen-shuo,Dai Gong-lian.Adaptability study on small resistance fasteners on long-span continuous ballastless bridge[J].J Huazhong Univ of Sci&Tech:Natural Science Edition,2013,41(7):36-41.
[5]闫斌.高速铁路中小跨度桥梁与轨道相互作用研究[D].长沙:中南大学土木工程学院,2013.
[6]Ruge P,Widarda D R,Schmalzlin G,et al.Longitudinal track-bridge interaction due to sudden change of coupling interface[J].Computers&Structures,2009,87(1/2):47-58.
[7]Simes R,Calada R,Delgado R.Track-bridge interaction in railway lines:Application to the study of the bridge over the River Moros[M].London:CRC Press/Balkema,2009:201-210.
[8]Okelo R,Olabimtan A.Nonlinear rail-structure interaction analysis of an elevated skewed steel guideway[J].Journal of Bridge Engineering,2011,16(3):392-399.
[9]DS 899/59,铁路新干线上桥梁的特殊规程[S].
[10]UIC 774—3E,Track/bridge interaction recommendations for calculations[S].
[11]TB 10015—2012,铁路无缝线路设计规范[S].
[12]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 Jun-qing,Li Hong-nian,Feng Dong.Experimental study and computational analysis on braking force between running train and railway bridge[J].Engineering Mechanics,2006,23(3):134-140.
[13]殷明旻,易南福,孟文力,等.40 t轴重重载铁路无缝线路纵向附加力研究[J].铁道工程学报,2012,169(10):37-42.Yin Ming-min,Yi Nan-fu,Meng Wen-li,et al.40 t axle load heavy haul railway continuously welded rail track longitudinal force study[J].Journal of Railway Engineering Society,2012,169(10):37-42.
[14]胡国华.山西中南部铁路通道重载连续梁设计[J].铁道勘察,2012,3:59-64.Hu Guo-hua.Heavy load continuous beam design of south-central Shanxi railway[J].Railway Investigation and Surveying,2012,3:59-64.
[15]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):7-14.Dai Gong-lian,Zhu Jun-pu,Yan Bin.The adaptability research of heavy haul trains and existing railway simplysupported bridge[J].Journal of Railway Science and Engineering,2014,11(2):7-14.
[16]铁道部第三勘测设计院,中国铁道科学研究院.重载铁路设计规范(征求意见稿)[DB/OL].[2013-2-22].http:∥www.docin.com/p-602484387.html.
[17]TB 10002.1—2005,铁路桥涵设计基本规范[S].
[18]TB10621—2009,高速铁路设计规范(试行)[S].
[19]EN 1991-1-3,Eurocaode 1:Actions on structure on bridges[S].
[2]Dai Gong-lian,Yan Bin.Longitudinal forces of continuously welded rail on high-speed railway cable-stayed bridge considering impact of adjacent bridges[J].Journal of Central South University,2012,19(8):2348-2353.
[3]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 load-history[J].Journal of the China Railway Society,2014,36(6):75-80.
[4]刘文硕,戴公连.大跨径无砟连续梁上小阻力扣件的适应性研究[J].华中科技大学学报:自然科学版,2013,41(7):36-41.Liu Wen-shuo,Dai Gong-lian.Adaptability study on small resistance fasteners on long-span continuous ballastless bridge[J].J Huazhong Univ of Sci&Tech:Natural Science Edition,2013,41(7):36-41.
[5]闫斌.高速铁路中小跨度桥梁与轨道相互作用研究[D].长沙:中南大学土木工程学院,2013.
[6]Ruge P,Widarda D R,Schmalzlin G,et al.Longitudinal track-bridge interaction due to sudden change of coupling interface[J].Computers&Structures,2009,87(1/2):47-58.
[7]Simes R,Calada R,Delgado R.Track-bridge interaction in railway lines:Application to the study of the bridge over the River Moros[M].London:CRC Press/Balkema,2009:201-210.
[8]Okelo R,Olabimtan A.Nonlinear rail-structure interaction analysis of an elevated skewed steel guideway[J].Journal of Bridge Engineering,2011,16(3):392-399.
[9]DS 899/59,铁路新干线上桥梁的特殊规程[S].
[10]UIC 774—3E,Track/bridge interaction recommendations for calculations[S].
[11]TB 10015—2012,铁路无缝线路设计规范[S].
[12]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 Jun-qing,Li Hong-nian,Feng Dong.Experimental study and computational analysis on braking force between running train and railway bridge[J].Engineering Mechanics,2006,23(3):134-140.
[13]殷明旻,易南福,孟文力,等.40 t轴重重载铁路无缝线路纵向附加力研究[J].铁道工程学报,2012,169(10):37-42.Yin Ming-min,Yi Nan-fu,Meng Wen-li,et al.40 t axle load heavy haul railway continuously welded rail track longitudinal force study[J].Journal of Railway Engineering Society,2012,169(10):37-42.
[14]胡国华.山西中南部铁路通道重载连续梁设计[J].铁道勘察,2012,3:59-64.Hu Guo-hua.Heavy load continuous beam design of south-central Shanxi railway[J].Railway Investigation and Surveying,2012,3:59-64.
[15]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):7-14.Dai Gong-lian,Zhu Jun-pu,Yan Bin.The adaptability research of heavy haul trains and existing railway simplysupported bridge[J].Journal of Railway Science and Engineering,2014,11(2):7-14.
[16]铁道部第三勘测设计院,中国铁道科学研究院.重载铁路设计规范(征求意见稿)[DB/OL].[2013-2-22].http:∥www.docin.com/p-602484387.html.
[17]TB 10002.1—2005,铁路桥涵设计基本规范[S].
[18]TB10621—2009,高速铁路设计规范(试行)[S].
[19]EN 1991-1-3,Eurocaode 1:Actions on structure on bridges[S].