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原文传递 The Elastic Modulus Limits of Support Layer in Bi-block Ballastless Track Based on Train Load Effect

题名：	The Elastic Modulus Limits of Support Layer in Bi-block Ballastless Track Based on Train Load Effect
正文语种：	中文
作者：	Pingrui ZHAO Likang GUO Yuan'ai ZHANG Xueyi LIU
作者单位：	School of ivil Engineering,Southwest Jiaotong University, hengdu 610031,Sichuan, hina Southwest Research Institute Limited ompany of .R.E. . hengdu 610031,Sichuan, hina
关键词：	support layer elastic modulus ballastless track beam-plate model on elastic foundation
摘要：	The bending stress and displacement distribution of track slab and support layer due to train load was studied using the beam-plate finite element model on elastic foundation when different type and modulus of support layer were used.The results show that the support layer type have great impact on the displacement of support layer and the stress on subgrade,but have little impact on the bending stress of track slab and support layer.The continuous support layer and articulated support layer with shear transfer device at their ends are recommended.In order to restrict the stress in support layer to be less than that in track slab,the modulus of the continuous support layer,the unit support layer and the articulated support layer should not be larger than 15GPa,22GPa and 20.5GPa respectively To restrict the step in support layer to be less than(1)mm,the unit support layer modulus should not be more than 20GPa.
会议日期：	20091128
会议举办地点：	成都
会议名称：	高速铁路、线路工程设计理论、施工及养护技术国际学术会议
出版日期：	2009-11-28
母体文献：	高速铁路、线路工程设计理论、施工及养护技术国际学术会议论文集