岩土工程学报2024，Vol.46Issue(8)：1613-1621,9.DOI:10.11779/CJGE20221579
勘察数据变化条件下空间变异土坡稳定可靠度协同更新方法
Collaborative reliability updating of slopes with spatially varying soil properties considering different site investigation data
摘要
Abstract
The Bayesian theory provides an effective tool to properly characterize the spatial variability of soil properties and quantify the effect of site investigation data(e.g.,undrained shear strength data)on reliability of slope stability.However,the site investigation data sequentially appears at different spatial locations of a slope,and the model to characterize the spatially varying soil properties(e.g.,random field model)usually involves a great number of uncertain parameters.These pose a great computational challenge for Bayesian updating of slope reliability considering spatially varying soil properties.A collaborative reliability updating approach for the slope stability with spatially varying soil properties considering different site investigation data is proposed.It first makes use of the Bayesian updating with structural reliability methods(BUS)to simulate random fields and perform slope stability analyses,and then employs the rejection sampling principle and collaborative analysis to characterize the spatially varying soil properties and update the reliability of slope stability considering different test data.As the site investigation data spatially appears within a slope,repeated simulations of conditional random fields and a significant number of slope stability analyses are avoided.Moreover,the combination of the BUS makes it possible for efficient slope reliability updating using the Bayesian analysis that involves high-dimensional model parameters.A single-layered soil slope with a non-stationary random field is employed to demonstrate the effectiveness and validity of the proposed approach.It is shown that the proposed approach provides an effective tool for dynamic characterization of spatial variability of soils and real-time reliability updating of slope stability under different site investigation data.关键词
土坡/空间变异性/勘察数据/贝叶斯更新/协同式分析/稳定可靠度Key words
soil slope/spatial variability/site investigation data/Bayesian updating/collaborative analysis/reliability assessment分类
建筑与水利引用本文复制引用
田华明,李典庆..勘察数据变化条件下空间变异土坡稳定可靠度协同更新方法[J].岩土工程学报,2024,46(8):1613-1621,9.基金项目
国家自然科学基金重点项目(U2240211) （U2240211）
