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| Research on the Stiffness Design and Its Value for Long Span Railway Steel Truss Cable-stayed Bridge |
| CHEN Ke-jian1，LI Yong-le2，LI Long2，ZENG Yong-ping1 |
| 1.China Railway Eryuan Engineering Group Co．Ltd，Chengdu，Sichuan 610031，China；2.Southwest Jiaotong University，Chengdu，Sichuan 610031，China |
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Abstract Research purposes：The stiffness design parameters of most of long span railway steel truss cable-stayed bridges in safe operation are summarized firstly．Referring to current codes around the world，and considering stiffness characteristics of railway cable-stayed bridge，the stiffness indexes of long span railway steel truss cable-stayed bridges are discussed．Then，the dynamic responses of vehicles and bridge are calculated by the coupled vibration method of vehicle-bridge systems to explore the effect of depth-span ratio and width-span ratio．And the reasonable value ranges of the stiffness design indexes are presented for long span railway steel truss cable-stayed bridges．
Research conclusions：(1)According the existing long span railway steel truss cable-stayed bridges and current codes，considering the difference of loads，the requirement of vertical stiffness of long span railway steel truss cable-stayed bridges can be reduced to certain degree．The ratio of vertical deflection to span should be in the range of 1/500~1/800 for the design of long span railway steel truss cable-stayed bridges．(2)The ratio of lateral deflection to span at the design wind speed can be up to 1/1 000~1/2 000，the ratio of lateral deflection to span at the wind speed allowing train operation should be less than 1/4 000 according to the current code．(3)The ratio of truss height to span should betaken as 1/25~1/40，the ratio of truss width to span should be 1/25~1/35．(4)In this paper，the research results call provide the valuable reference for the design of long span railway steel truss cable-stayed bridge．
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Received: 13 November 2013
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[1]辛学忠，郭向荣。大跨度铁路桥梁刚度统一描述方法探讨[J]．铁道工程学报，2007(1)：82-86．
Xin Xuezlaong．Guo Xiangrong．Exploration on Unified Describing Method for Rigidity of Large-span Railway Bridge[J]．Journal of Railway Engineering Society，2007(1)：82-86．
[2]李小珍，强士中．大跨度公铁两用斜拉桥车桥动力分析[J]．振动与冲击，2003(1)：6-9，19，25．
Li Xiaozhen，QiangShizhong．Vehicle-Bridge Dynamic Analysis for Long Span Highway and Railway Bi- Purpose Cable-Stayed Bridge[J]．Journal of Vibration and Shock，2003(1)：6-9，19，25．
[3]程国庆，潘家英．大跨度铁路斜拉桥竖向刚度分析[C]//全国桥梁结构学术大会论文集．武汉：同济大学出版社，1992．
Cheng Guoqing，Pan Jiaying．Long-span Railway Cable-stayed Bridge Vertical Stiffness Analysis[C]//National Academic Conference Proceedings of Bridge Structure．Wuhan：tongji University Press,1992．
[4] 高阳，曾庆元．钢梁横向刚度与行车安全[J]．铁道建筑，1997(9)：19-20．
Gao Yang，Zeng Qingyuan．Transverse Stiffness and Driving Safety of Steel Beam [J]． Railway Engineering，1997(9)：19-20．
[5]铁建设[2007]47号，新建时速300～350公里客运专线铁路设计暂行规定[S]．
Railway Construction[2007]No．47，The Temporary Regulations for the Designs of the Passenger Dedicated Railway with a Speed of 300 km/h to 350 km/h[S]．
[6] 周诗广．大跨度桥上铺设无砟轨道结构设计研究[J]．铁道标准设计，2011(3)：1-5．
Zlaou Shiguang．Study On Structural Design of Ballastless Tracks Laid on the Long-span Bridges[J]．Railway Standard Design，2011(3)：1-5．
[7] 李小珍．高速铁路列车-桥梁系统耦合振动理论及应用研究[D]．成都：西南交通大学，2000．
Li Xiaozlaen．High Speed Railway Train-Bridge System Coupling Vibration Theory and Application Research[D]．Chengdu：Southwest Jiaotong University，2000．
[8]严国敏．现代斜拉桥[M]．成都：西南交通大学出版社，1996．
Yan Guomin．Modern Cable—Stayed Bridges[M]．Chengdu：Southwest Jiaotong University Press，1996．
[9]李永乐，蔡宪棠，安伟胜，等．大跨度铁路悬索桥结构刚度敏感性研究[J]．中国铁道科学，2011(4)：24-30．
Li Yongle，Cai Xiantang，An Weisheng，ere．Study on the Sensitivity of the Structural Stillness of Long-span Railway Suspension Bridge[J]． China Railway Science，2011(4)：24-30．
[10]张强，李永乐，邓江涛，等．桁宽对大跨度铁路斜拉桥车-桥耦合振动性能的影响研究[J]．桥梁建设，2012(1)：19-23．
Zhang Qiang，Li Yongle，Deng Jiangtao，etc．Coupling Vibration of Long Span Railway Steel Truss Girder Cable-Stayed Bridge[J]．Bridge Construction，2012(1)：19-23．
[11]TB 10621—2009，高速铁路设计规范(试行)[S]．
TB 10621—2009，Code for Design of High Speed Railway『S1．
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2014, Vol. 31 
