期刊
APPLIED MATHEMATICAL MODELLING
卷 45, 期 -, 页码 226-237出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.apm.2016.12.027
关键词
Reliability analysis; Conjugate search direction; First-order reliability method; Hybrid conjugate finite-step length
The robustness and efficiency of the first-order reliability method (FORM) are the important issues in the structural reliability analysis. In this paper, a hybrid conjugate search direction with finite-step length is proposed to improve the efficiency and robustness of FORM, namely hybrid conjugate finite-step length (CFSL-H). The conjugate scalar factor in CFSL-H is adaptively updated using two conjugate methods with a dynamic participation factor. The accuracy, efficiency and robustness of the CFSL-H are illustrated through the nonlinear explicit and structural implicit limit state functions with normal and non-normal random variables. The results illustrated that the proposed CFSL-H algorithm is more robust, efficient and accurate than the modified existing FORM algorithms for complex structural problems. (C) 2016 Elsevier Inc. All rights reserved.
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