基于拟牛顿近似二阶法的岩土工程系统可靠性分析

doi:10.13722/j.cnki.jrme.2017.1230

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Abstract Multi-failure modes inherently exist in geotechnical engineering practices，which are typically considered as series system problems in literature. However，the existing system reliability methods can hardly achieve a good balance between the computational cost and accuracy. Given this limitation，a novel method integrates a highly efficient second order reliability method(SORM) and a practical system reliability approach was proposed in this paper. Specifically，the quasi-Newton approximation-based SORM was used to approximate the second order reliability index for each limit state function(LSF)，providing a basis for the further linearization transformation，so as to ultimately implement the improved linearization approach to obtain the system reliability results. In addition，two examples of common geotechnical problems featuring series system reliability analyses-a semi-gravity retaining wall and a soil slope with multiple layers were reviewed for illustration. The computed results with the proposed method show good computational efficiency and accuracy.

Key words： slope engineering second order reliability method(SORM) quasi-Newton approximation system reliability semi-gravity retaining wall layered soil slope

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	Articles by authors
	ZENG Peng
	CHEN Yu
	LI Tianbin

Cite this article:

ZENG Peng,CHEN Yu,LI Tianbin. System reliability of geotechnical problems using quasi-Newton approximation-based sorm[J]. , 2018, 37(3): 726-733.

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https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2017.1230 OR https://rockmech.whrsm.ac.cn/EN/Y2018/V37/I3/726

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