PROBABILISTIC SENSITIVITY ANALYSIS ILLUSTRATED FOR AN UNDERGROUND ROCK EXCAVATION

被引：0

作者：

Chan, Chin Loong ^{[1
]}

Low, Bak Kong ^{[1
]}

Ng, Mel Vin Wei Meng ^{[2
]}

机构：

[1] Nanyang Technol Univ, Sch Civil & Environm Engn, Singapore 639798, Singapore

[2] Jurong Town Corp, Project Management & Contracts Div, Singapore, Singapore

来源：

ADVANCES IN UNDERGROUND SPACE DEVELOPMENT | 2013年

关键词：

underground excavation; tunnel; probability; reliability; sensitivity;

D O I：

10.3850/978-981-07-3757-3_RP-132-P135

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

This paper presents an efficient way of approximating probabilistic sensitivity factors involving correlated random variables, and provides an illustration for the case of an underground rock excavation. Stress-controlled instability mechanisms are investigated, in which the jointed rock mass is regarded as an equivalent continuum. The proposed sensitivity factors are based on the Hasofer-Lind reliability index and the first-order reliability method (FORM), and can be extended to compute reliability sensitivities with respect to the mean value or standard deviation. Numerical differentiation and Monte Carlo simulations are carried out for verification. Comparisons between conventional deterministic sensitivity study and stochastic sensitivity analysis are made and discussed.

引用

页码：1227 / 1238

页数：12

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