津保矮塔斜拉桥空间分析研究

吴大宏; 王立中; 张帅; 张海

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铁道工程学报 ›› 2013, Vol. 30 ›› Issue (4) : 56-60.

桥梁工程

津保矮塔斜拉桥空间分析研究

吴大宏,王立中,张帅,张海

作者信息 +

Research on the Spatial Analysis of Short Tower Cable － stayed Bridge on Tianjin － Baoding Railway

WU Da － hong，WANG Li － zhong，ZHANG Shuai，ZHANG Hai

Author information +

文章历史 +

摘要

研究目的：拟建津保铁路子牙河特大桥主桥上部结构采用有砟轨道( 84 +56 +32) m 矮塔斜拉桥，鉴于该桥的不对称性和受力复杂等特点，本文旨在通过空间静力计算、动力特性分析、稳定性分析、拉索应力幅以及不平衡索力计算、局部应力分析、抗震性能分析等，以验证该桥在整体结构及局部构造上的安全可靠性。

研究结论：(1) 在列车荷载及温度作用下，主梁横、竖向变形较小，结构具有足够的刚度; (2) 主梁各截面的应力及强度安全系数均在设计规范要求的限值之内; (3) 斜拉索的强度安全系数为 2．75，分丝管索鞍两侧环氧砂浆抗滑移安全系数大于3．0，具有足够的安全性; (4) 主体结构弹性屈曲稳定系数大于 5，结构稳定性满足规范要求; (5) 本桥满足“小震不坏、中震可修、大震不倒”的抗震设计目标。

Abstract

Research purposes:A ballasted track low tower cable － stayed bridge with span arrangement of ( 84+ 56+32) m is adopted in constructing the upper major bridge of the proposed Ziya River，Tianjin － Baoding Railway Bridge．Considering its unsymmetry and complexity，the article focuses on calculating and analysing the spacial statics，the dynamic characteristics，the stability，the cable stress amplitude，the unbalanced cable force，the local stress，the seismic performance，and so on to prove the safety of either whole or partial structure．

Research conclusions: The research shows: (1) Transverse and vertical deformation of the main beam is small，even under the consideration of train load and temperature effect，thus the structure is sufficiently rigid．(2) The stress and intensity safety factor of each section of the main beam are within the limits of the design specification requirements． (3) The strength safety factor of the inclined cable is 2.75 and the anti －slip safety factor of the saddles epoxy mortar on both sides of the divider silk tubes is greater than 3.0，which guarantees enough security．(4) The elastic buckling stability factor of the main structure is greater than 5，which confirms that the structural stability meets the specification requirements．(5) The bridge satisfies the target of seismic design that“A Bridge should be Unruinable in Micro Seism，Repairable in Medium Shock，and does not Fall in Strong Earthquakes”．

导出引用

吴大宏, 王立中, 张帅, 等. 津保矮塔斜拉桥空间分析研究[J]. 铁道工程学报, 2013, 30(4): 56-60

WU Da － hong, WANG Li － zhong, ZHANG Shuai, et al. Research on the Spatial Analysis of Short Tower Cable － stayed Bridge on Tianjin － Baoding Railway[J]. Journal of Railway Engineering Society, 2013, 30(4): 56-60

中图分类号： U448

参考文献

［1］王召祜．青藏铁路拉萨河特大桥方案设计［J］．桥梁建设， 2005(5) : 1－3．

Wang Zhaohu． Conceptual Design of River Bridge on Qinghai － Tibet Railway［J］．Bridge Construction，2005 (5) :1－3．

［2］李凤芹，王祯．拉萨河特大桥主桥结构设计［J］．桥梁建设，2005(5) :8－12．

Li Fengqin，Wang Zhen． Structural Design of Main Bridge of Lhasa River Bridge［J］．Bridge Construction， 2005(5) : 8－12．

［3］陈从春，周海智，肖汝诚．矮塔斜拉桥研究的新进展［J］．世界桥梁，2006(1) :70－73．

Chen Congchun，Zhou Haizhi， Xiao Rucheng． New Developmeng of Research on Short Tower Cable － stayed Bridge［J］． World Bridges，2006(1) : 70－73．

［4］刘凤奎，蔺鹏臻，孙红红．矮塔斜拉桥塔高优化［J］．铁道工程学报，2003(4) :71－74．

Liu Fengkui， Rui Pengzhen， Sun Honghong． PyIon Height Optimization for Short Tower Cable － stayed Bridge［J］． Journal of Railway Engineering Society， 2003(4) : 71－74．

［5］李晓莉，肖汝诚．矮塔斜拉桥的力学行为分析与设计实践［J］．结构工程师，2005(4) :7－9．

Li Xiaoli，Xiao Rucheng． Mechanical Action Analysis and Design Practice of Short Tower Cable － stayed Bridge ［J］． Structral Engineers，2005(4) : 7－9．

［6］朱永伟，卢明辉．铁路矮塔斜拉桥自振特性分析［J］．低温建筑技术，2011(7) :41－42．

Zhu Yongwei，Lu Minghui． Analysis of Self － Vibration Characteristics for The Partial Cable － stayed Bridge of Railway［J］． Low Temperature Architecture Technology， 2011(7) : 41－42．

［7］陈亨锦，王凯，李承根．浅谈部分斜拉桥［J］．桥梁建设， 2002(1) : 44－47．

Chen Hengjin，Wang Kai，Li Chenggen． Preliminary Analysis of Partial Cable － stayed Bridge［J］． Bridge Construction，2002(1) 44－47．

［8］吴祖根．矮塔斜拉桥设计综述［J］．市政技术，2010(1) : 66－69．

Wu Zugen． Review for Cable Stayed Bridge with Short Tower［J］． Minicipal Engineering Technology，2010(1) :66－69．