铁路隧道衬砌结构分项系数的优化分析研究

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Abstract Research purposes:The practical design expression with a partial coefficient，not only inherited the form of traditional structural design，but also reflected the structural design requirements for the target reliability index. It is the important way to measure the level of structure security with application of a reliable indicator. According to the stress characteristics and material properties of railway tunnel lining structure，the load-structure model is established using the three kinds of limit states design equations of the compressive concrete lining structure，the anti一cracking concrete lining structure and reinforced concrete lining structure.

Research conclusions:The statistical characteristic of railway tunnel lining structure effect is analyzed using Monte-Carlo stochastic finite element method，according to the probability statistical characteristics of material characteristic resistance and difference minimization principle between the calculated reliability index and the target reliability index，the following conclusions are analyzed:(1)The railway tunnel lining structure is checked，the surrounding rock pressure partial coefficient is 1 .4，gravity loads partial coefficient is 1 .2.(2)The three kinds of adjustment coefficients of reinforced concrete，concrete compressive strength，concrete anti一cracking coefficient are 1 .OS，1 .85，2. 35.(3)The calculation results can provide theoretical basis for the railway tunnel design equations;partial coefficient code revision.

Key words： tunnel lining structure limit states design optrmizatron

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	Articles by authors
	YU Yu
	ZHAO Dong一ping`
	SONG Yu一xiangZ
	ZHANG Xiao一jingz
	QI Jianxu

Cite this article:

YU Yu,ZHAO Dong一ping`,SONG Yu一xiangZ, et al. Analysis of Partial Coefficient Optimization of Lining Structure in Railway Tunnel[J]. Journal of Railway Engineering Society, 2015, 32(6): 57-61.

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https://tdgcxb.crec.cn/EN/ OR https://tdgcxb.crec.cn/EN/Y2015/V32/I6/57

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