Drained instability in loose granular material

NCU Institutional Repository > 工學院 > 土木工程學系 > 期刊論文 > Item 987654321/100465

請使用永久網址來引用或連結此文件: https://ir.lib.ncu.edu.tw/handle/987654321/100465

題名:	Drained instability in loose granular material
作者:	莊長賢;Dong, Quanyang;Xu, Changjie;Cai, Yuanqiang;Juang, Hsein;Wang, Jun;Yang, Zhongxuan;Gu, Chuan
貢獻者:	工學院土木工程學系
關鍵詞:	Constants;Granular materials;Instability;Sand;Soils;Stability;Stresses;Technical Papers;Void ratio
日期:	2016-04-01
上傳時間:	2026-04-21 14:03:32 (UTC+8)
出版者:	American Society of Civil Engineers (ASCE);American Society of Civil Engineers
摘要:	摘要： AbstractThe constant shear drained (CSD) test is considered an appropriate test to simulate the instability behavior of soils in slopes under water infiltration conditions or lateral stress relief. However, contradiction of the drained instability in loose granular material exists in the reported test results, which is considered because of the condition of constant deviatoric stress (q) not strictly satisfied in the literature. Because the variation of q during the CSD test has significant effects on the test results, more data from tests under a true constant q condition are needed to clarify this subject. In this paper, CSD and conventional undrained triaxial tests in both compressive and extensive loading were performed to investigate the instability behavior of loose sand. All the CSD tests were conducted by advanced variable confining pressure triaxial apparatus, in which a true constant q was maintained during the test; thus, more reliable results were obtained. It is observed experimentally that when a specimen is sheared along a fully drained stress path with a constant q but decreasing effective mean normal stress, instability occurs before the effective stress path reaches the failure line. It is also found that the onset of instability for both undrained and CSD tests are initiated at almost the same stress ratio for a given void ratio of specimens. Hill’s stability conditions in terms of the sign of the second work increment are used to interpret the experimental results of instability. The high-quality test results obtained in this study may help to explain the contradiction reported in the literature and clarify the controversy in drained instability. 出版者： American Society of Civil Engineers 出版日期： 2016-04-01 出處： International journal of geomechanics, 2016-04, Vol.16 (2) 版權： 2015 American Society of Civil Engineers 識別號： ISSN: 1532-3641 識別號： EISSN: 1943-5622 識別號： DOI: 10.1061/(ASCE)GM.1943-5622.0000524
顯示於類別:	[土木工程學系 ] 期刊論文

文件中的檔案:

檔案	描述	大小	格式	瀏覽次數
index.html		0Kb	HTML	16	檢視/開啟

在NCUIR中所有的資料項目都受到原著作權保護.

社群 sharing

資料載入中.....