交通运输工程学报
JOURNAL OF TRAFFIC AND TRANSPORTATION ENGINEERING
2006 Vol.6 No.1 P.34-38


连续梁桥上无缝道岔伸缩力与位移计算

曾志平  陈秀方  赵国藩 

摘 要:将钢轨和梁体视为杆单元,轨枕视为梁单元,扣件阻力、道床阻力和桥墩刚度视为弹簧单元,建立了计算连续梁桥上无缝道岔伸缩力与位移的有限元力学模型,根据变分原理和"对号入座"法则建立了模型求解的非线性方程组,分析了道岔设计参数对桥上无缝道岔伸缩力和位移的影响.研究结果表明:伸缩调节器布置在道岔的后端,连续梁固定墩的纵向力可降低43.2%;增加连续梁固定墩纵向刚度有利于减小钢轨位移;连续梁固定支座的位置对系统的受力与变形有双重影响,实际设计时应综合考虑.
关键词:铁道工程;桥上无缝道岔;有限元;伸缩力;位移
分类号:U213.6 文献标识码:A

文章编号:1671-1637(2006)01-0034-05

Calculation of Longitudinal Force and Displacement of Seamless Turnout on Continuous Beam Bridge

ZENG Zhi-ping   CHEN Xiu-fang   ZHAO Guo-fan 

基金项目:铁道部科技研究开发计划项目(2004G05-A)
作者简介:曾志平(1975-),男,湖南宁乡人,中南大学工学博士研究生,从事列车-轨道-桥梁振动与结构可靠性研究.
作者单位:曾志平(中南大学,土木建筑学院,湖南,长沙,410075) 
     陈秀方(中南大学,土木建筑学院,湖南,长沙,410075) 
     赵国藩(大连理工大学,土木水利学院,辽宁,大连,116024) 

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收稿日期:2005年10月15日

出版日期:2006年3月31日

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