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Stochastic Finite Element Analysis of Gravity Platform Foundation

by K. Munaswamy, Memorial Univ of Newfoundland, Faculty of Engineering & Applied, Science, St. John's, Newfoundl, Canada,
M. Arockiasamy, Memorial Univ of Newfoundland, Faculty of Engineering & Applied, Science, St. John's, Newfoundl, Canada,



Document Type: Proceeding Paper

Part of: Civil Engineering in the Arctic Offshore

Abstract:

Gravity foundation design requires determination of total and differential settlement, vertical stress distribution beneath the raft and maximum shear stresses in the sand layers in the foundation. Deterministic models cannot be used to assess the spatial variability on differential settlement, even with sensitivity analysis, since soil strata are spatially variable. An obvious approach to circumvent the difficulty is to introduce stochastic variability in soil properties by way of using stochastic finite element models. Short term settlement analysis of gravity platform foundation using stochastic finite element is presented considering spatial variability of element moduli. Variance and covariance of settlements and differential settlements as well as stresses are determined due to wave and gravity loading.

Subject Headings: Finite element method | Foundation settlement | Stochastic processes | Foundation design | Offshore structures | Soil settlement | Offshore platforms

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