Analysis of a typical railway turnout sleeper （分析一个典型的铁路投票率卧铺）.pdfVIP

Analysis of a typical railway turnout sleeper system using grillage beam analogy 1 1 1 2 A.C. Manalo , T. Aravinthan *, W. Karunasena , and N. Stevens 1Centre of Excellence in Engineered Fibre Composites (CEEFC), University of Southern Queensland, Toowoomba 4350, Australia 2Nick Stevens Consulting, Pty Ltd, Kenmore, Queensland 4069, Australia Abstract A simplified grillage beam analogy was performed to investigate the behaviour of railway turnout sleeper system with a low value of elastic modulus on different support moduli. This study aimed at determining an optimum modulus of elasticity for an alternative fibre composite sleeper for turnout application. The numerical simulation suggests that the changes in modulus of elasticity of sleeper, E and the sleeper support modulus, U have a sleeper s significant influence on the behaviour of turnout sleepers. The increase in U from 10 to 40 s MPa resulted in a 15% reduction in the bending moment while the increase in Esleeper from 1 GPa to 10 GPa has resulted in almost 75% increase in the bending moment. The shear forces in turnout sleepers is not sensitive to both the changes of the E and U while the sleeper sleeper s with low Esleeper tend to undergo greater settlement into the