Numerical Methods for Geo-Engineering
doi:10.3850/978-981-07-0188-8_P069
Effective Solution of Large-Scale Soil-Structure Interaction Problems
Krishna Bahadur Chaudhary1, Kok-Kwang Phoon2, Kim-Chuan Toh3
and Sze-Han Hong1
1GeoSoft Pte Ltd, 2 Kaki Bukit Place, #07-00 Tritech Building,
Singapore 416180, Singapore
2Department of Civil Engineering, National University of Singapore,
Block E1A, #07-03, 1 Engineering Drive 2, Singapore 117576, Singapore
3Department of Mathematics, National University of Singapore,
2 Science Drive 2, Singapore 117543, Singapore
ABSTRACT
The significant contrasts in material stiffnesses in large-scale soil-structure interaction problems usually result in ill-conditioned systems. Iterative methods are preferred for such large-scale problems, where preconditioners play a key role. However, the performance of existing practical preconditioners is usually poor for such ill-conditioned systems. Some inexact blocks diagonal preconditioners have been proposed, recently, to effectively alleviate such ill-conditioning effects. Usually these solvers are coded for serial computation on scalar computers. In this paper, parallelization of the code has been explored using OpenMP and its usefulness is illustrated through a tunneling example using GeoFEA.
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