{"title":"Large strain radial thermo-consolidation model for saturated soil foundation","authors":"","doi":"10.1016/j.compgeo.2024.106788","DOIUrl":null,"url":null,"abstract":"<div><div>Based on the piecewise-linear approach, a large strain nonlinear radial thermo-consolidation model for saturated soil foundation, called RTCS1, is established. The model uses the finite difference method to solve the governing equations of radial heat transfer in the soil layer and couples it with large strain radial consolidation. RTCS1 accounts for thermal effect, thermal expansion, time-dependent load increment and time-dependent heat source temperature, unload/reload effects, radial and vertical flows, equal strain and equal stress, and the nonlinear changes of soil parameters during thermo-consolidation process. Validation of the model is conducted through laboratory and field test of thermo-consolidation from existing literature, and the RTCS1 numerical solution for settlement is in good agreement with the test values. Computational examples are presented to explore the effect of strain condition, strain magnitude, and heating mode on the thermo-consolidation of saturated soil foundations. The findings indicate that the consolidation rate under equal strain condition is greater than that under equal stress condition, the lager strain leads to faster heat transfer. Under the cyclic heating modes, the excess pore pressure cannot be completely dissipated, and the soil settlement, temperature and excess pore pressure fluctuated with time.</div></div>","PeriodicalId":55217,"journal":{"name":"Computers and Geotechnics","volume":null,"pages":null},"PeriodicalIF":5.3000,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Computers and Geotechnics","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0266352X24007274","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS","Score":null,"Total":0}
引用次数: 0
Abstract
Based on the piecewise-linear approach, a large strain nonlinear radial thermo-consolidation model for saturated soil foundation, called RTCS1, is established. The model uses the finite difference method to solve the governing equations of radial heat transfer in the soil layer and couples it with large strain radial consolidation. RTCS1 accounts for thermal effect, thermal expansion, time-dependent load increment and time-dependent heat source temperature, unload/reload effects, radial and vertical flows, equal strain and equal stress, and the nonlinear changes of soil parameters during thermo-consolidation process. Validation of the model is conducted through laboratory and field test of thermo-consolidation from existing literature, and the RTCS1 numerical solution for settlement is in good agreement with the test values. Computational examples are presented to explore the effect of strain condition, strain magnitude, and heating mode on the thermo-consolidation of saturated soil foundations. The findings indicate that the consolidation rate under equal strain condition is greater than that under equal stress condition, the lager strain leads to faster heat transfer. Under the cyclic heating modes, the excess pore pressure cannot be completely dissipated, and the soil settlement, temperature and excess pore pressure fluctuated with time.
期刊介绍:
The use of computers is firmly established in geotechnical engineering and continues to grow rapidly in both engineering practice and academe. The development of advanced numerical techniques and constitutive modeling, in conjunction with rapid developments in computer hardware, enables problems to be tackled that were unthinkable even a few years ago. Computers and Geotechnics provides an up-to-date reference for engineers and researchers engaged in computer aided analysis and research in geotechnical engineering. The journal is intended for an expeditious dissemination of advanced computer applications across a broad range of geotechnical topics. Contributions on advances in numerical algorithms, computer implementation of new constitutive models and probabilistic methods are especially encouraged.