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ZJUS-A
Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering)  2005, Vol. 6 Issue ( 8): 14-    DOI: 10.1631/jzus.2005.A0878
    
The critical loading for lateral buckling of continuous welded rail
SUNG Wen-pei, SHIH Ming-hsiang, LIN Cheng-I, GO Cheer Germ
Department of Landscape Design and Management, National Chin-Yi Institute of Technology, Taiwan 41111, China; Department of Construction Engineering, National Kaoshiang First University of Science and Technology, Taiwan 824, China; Department of Fire Science, Wu-Feng Institute of Technology, Ming-Hsiung, Chiayi, Taiwan 621, China; Department of Civil Engineering, National Chung Hsing University, Taiwan 40227, China
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Abstract  The most significant differences between continuous welded rails (CWRs) and general split-type connectors are axial compression in the longitudinal direction, buckling stability and other issues generated under the influence of thermal effect. Under thermal effect, a dynamical behavior similar to that of a beam fixed on two sides occurs in the central locked area of the welded rail, as there is axial compression but no possibility of sliding. Continuous welded rails do not contract or expand, and are supported by the dynamical system made up of ballasts and rail clips. The rail-support system mentioned above has the features of non-uniform material distribution and uncertainty of construction quality. Due to these facts, the dynamics method based on the linear elastic hypothesis cannot correctly evaluate the rail’s buckling conditions. This study is aimed at applying Finite Difference Method (FDM) and Monte Carlo Random Normal Variables Method to the analysis of welded rail’s buckling behavior during the train’s acceleration and deceleration, under thermal effect and uncertain factors of ballast and rail clips. The analysis result showed that buckling occurs under the combined effect of thermal effect and the train’s deceleration force co-effect and the variance ratio of ballast and rail clips is over 0.85, or under the combined effect of thermal effect and the train’s acceleration force when the variance ratio is over 0.88.

Key words： Thermal effect      Finite Difference Method      Monte Carlo Method      Buckling load     
Received: 30 January 2005     
CLC:  TU375  
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SUNG Wen-pei
SHIH Ming-hsiang
LIN Cheng-I
GO Cheer Germ
Cite this article:

SUNG Wen-pei, SHIH Ming-hsiang, LIN Cheng-I, GO Cheer Germ. The critical loading for lateral buckling of continuous welded rail. Journal of Zhejiang University-SCIENCE A (Applied Physics & Engineering), 2005, 6( 8): 14-.

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http://www.zjujournals.com/xueshu/zjus-a/10.1631/jzus.2005.A0878     OR     http://www.zjujournals.com/xueshu/zjus-a/Y2005/V6/I 8/14

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