教師資料查詢 | 類別: 期刊論文 | 教師: 吳朝賢 Wu Cho-sen (瀏覽個人網頁)

標題:A simplified approach for evaluating the bearing performance of encased granular columns
學年103
學期1
出版(發表)日期2014/08/01
作品名稱A simplified approach for evaluating the bearing performance of encased granular columns
作品名稱(其他語言)
著者吳朝賢; 洪勇善
單位淡江大學土木工程學系
出版者London: Elsevier Ltd
著錄名稱、卷期、頁數Geotextiles and Geomembranes 42(4), pp.339-347
摘要Tensile resistant materials used to encase cylindrical granular columns significantly improve column strength. For an encased granular column subjected to axial load, the axial deformation and volumetric expansion causes lateral expansion, which induces circumferential strain and stress in the encasement and provides additional confining pressure to the column.

To make good predictions of column behavior through numerical analysis, elaborate deductive and regressive work is needed to describe the mechanical properties of the filled material. This study analyzes the bearing performance of geosynthetic-encased sand columns using a simplified approach to reduce such laborious deductive efforts. A few equations and calculation steps are also proposed to evaluate the confining pressure increments and deviatoric stress due to encasement extension.

The proposed approach employs an empirical correlation between the dilation rate and deviatoric strain of pure sand to evaluate the volumetric strain of deformed encased granular columns. The approach has also been extended to evaluate the use of the constant volume assumption in predicting the responses of encased granular columns. The relationships between the confining pressure increment and encasement stiffness/column diameter ratio are established through simplified assumptions.

Results obtained from the proposed approach are validated and found to be in good agreement with the experimental measurements and numerically analysis results under rigorous parameter acquisition. The proposed approach provides accurate results without laborious analytical efforts.
關鍵字Encased granular columns; Geosynthetics; Simplified approach; Confining pressure increment; Dilation rate; Constant volume
語言英文(美國)
ISSN0266-1144
期刊性質國外
收錄於SCI;
產學合作
通訊作者洪勇善
審稿制度
國別英國
公開徵稿
出版型式,電子版
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