Simplifying calibration of bonded elasto-plastic models

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• 作者：Sara Rios^a ; ^{sara.rios@fe.up.pt" class="auth_mail" title="E-mail the corresponding author} ; Matteo Ciantia^b ; ^{matteo.ciantia@upc.edu" class="auth_mail" title="E-mail the corresponding author} ; Nubia Gonzalez^c ; ^{nubiaaurora.gonzalez@repsol.com" class="auth_mail" title="E-mail the corresponding author} ; Marcos Arroyo^b ; ^{marcos.arroyo@upc.edu" class="auth_mail" title="E-mail the corresponding author} ; Antó ; nio Viana da Fonseca^a ; ^{viana@fe.up.pt" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Constitutive model ; Cemented sand ; Porosity&ndash ; cement ratio ; CASM model ; High pressure triaxial tests
• 刊名：Computers and Geotechnics
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：73
• 期：Complete
• 页码：100-108
• 全文大小：2253 K

文摘

Using realistic constitutive models for artificially cemented soils is advantageous in design. However, the price of that increased realism is often a more elaborate model, which is difficult to calibrate. A database of high quality triaxial tests on compacted cemented silty sand is used to calibrate and validate a generalized critical state bonded soil model. The exercise highlights the staged calibration procedure that is convenient in this kind of application. The calibration results have shown a direct relation between added yield strength and a well-established soil–cement mixture ratio, which facilitates the application of the model in design. It is shown that such relation can be also deduced from the analysis of unconfined compressive strength tests.