Settlements and Subgrade Reactions of Surface Raft Foundations Subjected to Vertically Uniform Load
學年 110
學期 2
出版（發表）日期 2022-05-28
作品名稱 Settlements and Subgrade Reactions of Surface Raft Foundations Subjected to Vertically Uniform Load
作品名稱（其他語言）
著者 Der-Wen Chang; Chih-Wei Lu; Yu-Jhang Tu; Shih-Hao Cheng
單位
出版者
著錄名稱、卷期、頁數 Applied Sciences 12(11), 5484
摘要 The settlements and corresponding soil reactions of a surface raft foundation subjected to vertically uniform load at the sites of granular or cohesive soils have been qualitatively introduced to engineers in the past. This study intends to verify the foundation load-response mechanism using three-dimensional finite-element analyses. The Mohr–Coulomb soil model was used to simulate the nonlinear effects of the granular and cohesive soils. The coefficients of subgrade reactions of the soil were back-calculated and compared to those obtained from the rigid foundation model. For all the square surface rafts studied, non-uniform settlements with the largest value at the center can be found. For the smallest rafts located in clay, the soil reactions were found to be rather consistent. For larger rafts in clay, the soil reactions would be changed according to the soil stiffness and raft dimensions. For surface rafts in sand, the effects of soil stiffness on soil reactions appeared to be insignificant. The soil reactions were generally higher at the center and varied with raft dimensions. For the smallest raft in sand, large soil reactions can be found at the edge. The coefficients of subgrade reactions were found to be more consistent with the smallest values occurring at the center. The results of this study indicate that the load-response mechanism of the raft foundation is rather complicated. Such load-response mechanisms are strongly affected by the relative rigidity of the foundation depending on soil stiffness and foundation dimensions.
關鍵字 raft foundation;settlement; soil reactions;coefficient of subgrade reaction;finite-element analysis
語言 en_US
ISSN 2076-3417
期刊性質 國外
收錄於 SCI
產學合作
通訊作者 S.H. Cheng
審稿制度 是
國別 CHE
公開徵稿
出版型式 ,電子版
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