ISSN 2096-4498
CN 44-1745/U
Tunnel Construction ›› 2018, Vol. 38 ›› Issue (8): 1286-1292.DOI: 10.3973/j.issn.2096-4498.2018.08.004
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GONG Yanfeng1, 2, CHEN Wenbo3, *, FANG Qian3
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Abstract:
In order to solve the defects of selecting method of limit state in the process of calculating reliability indices (RI) of tunnel lining by JC method, the random finite element method and MonteCarlo method are used to sample and calculate the type Ⅲa and Ⅳb linings of 350 km/h highspeed doubletrack railway tunnel. The mean value and coefficient of variation of eccentricity of two kinds of lining sections are obtained. And then the ultimate state function and applicable conditions of plain concrete and reinforced concrete lining are analyzed; the geometric optimization method is introduced to represent the constraint conditions of ultimate state function and establish the optimization model of RI. Finally, the Global Search function with good optimization performance is used to optimize the RI of two kinds of lining sections, and also it is compared with JC method to prove the advantages of the optimization method.
Key words: highspeed doubletrack railway tunnel, tunnel lining, reliability index, ultimate state function, optimization solution
CLC Number:
U 451+.4
GONG Yanfeng, CHEN Wenbo, FANG Qian. Research on Optimization Methods for Structural Reliability Index of Tunnel Lining[J]. Tunnel Construction, 2018, 38(8): 1286-1292.
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URL: http://www.suidaojs.com/EN/10.3973/j.issn.2096-4498.2018.08.004
http://www.suidaojs.com/EN/Y2018/V38/I8/1286