山西中南部重载铁路桥梁设计活载标准研究

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Abstract Abstract：Research purposes： The standard of train live load is the core parameter of railway bridge design, live load diagram need consider the factors of the present situation and development of mobile equipment, transporting mode, the operation speed and loading mode. Under the background of Shanxi Central-south Region Railway corridor, six different live load diagrams are presented for the heavy load trains of 30 t axle load in China. Development reserve coefficients of these six loads are calculated to evaluate the level of development reserve, based on the Chinese railway standard live load (2005) (Z=1.2), which is the design load of this coal line. The results show that, for small and large-span bridges, the design live load development reserve coefficient is small, for medium-span bridges, the design live load development reserve coefficient is large.
Research conclusions：(1)The design live load, Chinese railway standard live load (2005) (Z=1.2) can meet the requirement of 30 t heavy axis load freight train on Shanxi Central-south Region Railway corridor at present.(2) For bridges and culverts between 1m to 12 m, the development reserve coefficients are between 1.0 to1.2；For bridges and culverts between 12 m to 200 m, the development reserve coefficients are larger than 1.2. (3)The special load in Chinese railway standard live load (2005) (Z=1.2) is small in order to load reserve coefficients of small-span bridges are relatively low, and the special load in Chinese railway standard live load (2005) need to be improved. (4) The research results can be directly applied to the subsequent design of heavy railway bridges.

Key words： Key words: heavy load railway Shanxi Central-south Region Railway corridor development reserve coefficient Chinese railway standard live load (2005)

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http://tdgcxb.crec.cn/EN/ OR http://tdgcxb.crec.cn/EN/Y2015/V32/I2/64

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