Advanced reliability analysis of slopes in spatially variable soils using multivariate adaptive regression splines

被引:80
|
作者
Liu, Leilei [1 ]
Zhang, Shaohe [2 ,3 ]
Cheng, Yung-Ming [1 ,4 ]
Liang, Li [4 ]
机构
[1] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Kowloon, Hung Hom, Hong Kong, Peoples R China
[2] Cent S Univ, Minist Educ, Key Lab Metallogen Predict Nonferrous Met & Geol, 932 Lushan South Rd, Changsha 410083, Hunan, Peoples R China
[3] Cent S Univ, Sch Geosci & Infophys, 932 Lushan South Rd, Changsha 410083, Hunan, Peoples R China
[4] Qingdao Univ Technol, Sch Civil Engn, Qingdao, Peoples R China
基金
中国国家自然科学基金;
关键词
Slope stability; Efficient reliability analysis; Spatial variability; Random field; Multivariate adaptive regression splines; Monte Carlo simulation; KARHUNEN-LOEVE EXPANSION; RESPONSE-SURFACE METHOD; SYSTEM RELIABILITY; STABILITY ANALYSIS; RISK-ASSESSMENT; SHEAR-STRENGTH; VARIABILITY; SIMULATION; PREDICTION; MODEL;
D O I
10.1016/j.gsf.2018.03.013
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
This study aims to extend the multivariate adaptive regression splines (MARS)-Monte Carlo simulation (MCS) method for reliability analysis of slopes in spatially variable soils. This approach is used to explore the influences of the multiscale spatial variability of soil properties on the probability of failure (P-f) of the slopes. In the proposed approach, the relationship between the factor of safety and the soil strength parameters characterized with spatial variability is approximated by the MARS, with the aid of Karhunen -Loeve expansion. MCS is subsequently performed on the established MARS model to evaluate P-f. Finally, a nominally homogeneous cohesive. frictional slope and a heterogeneous cohesive slope, which are both characterized with different spatial variabilities, are utilized to illustrate the proposed approach. Results showed that the proposed approach can estimate the P-f of the slopes efficiently in spatially variable soils with sufficient accuracy. Moreover, the approach is relatively robust to the influence of different statistics of soil properties, thereby making it an effective and practical tool for addressing slope reliability problems concerning time-consuming deterministic stability models with low levels of P-f. Furthermore, disregarding the multiscale spatial variability of soil properties can overestimate or underestimate the P-f. Although the difference is small in general, the multiscale spatial variability of the soil properties must still be considered in the reliability analysis of heterogeneous slopes, especially for those highly related to cost effective and accurate designs. (C) 2018, China University of Geosciences (Beijing) and Peking University. Production and hosting by Elsevier B.V.
引用
收藏
页码:671 / 682
页数:12
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