Creep and stress relaxation of geogrids

被引:51
作者
Leshchinsky, D [1 ]
Dechasakulsom, M [1 ]
Kaliakin, VN [1 ]
Ling, HI [1 ]
机构
[1] Univ Delaware, Dept Civil Engn, Newark, DE 19716 USA
关键词
geogrid; stress relaxation; creep; high density polyethylene; polyester;
D O I
10.1680/gein.4.0102
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
Most research on the long term behavior of geosynthetics has focused on creep; very little data is available on the stress relaxation behavior of geogrids. Consideration of both creep and stress relaxation in design may ultimately produce a more efficient structure while allowing for the use of a smaller creep reduction factor. The results of an initial effort to experimentally identify the stress relaxation behavior of nine typical geogrids used to reinforce soil structures is presented. A simple test method that directly measures the stress relaxation of geogrids was developed. The geogrids were subject to initial loads of 40, 60, and 80% of their ultimate short term strengths. Each test was carried out for a period of one month, or until creep rupture occurred, whichever was shortest. The maximum potential stress relaxation was approximately 30% of the initial load for polyester geogrids, and 50% for polyethylene geogrids.
引用
收藏
页码:463 / 479
页数:17
相关论文
共 20 条
[1]  
ALLEN T, 1982, P 2 INT C GEOT IFAI, V2, P775
[2]  
[Anonymous], 1986, P 3 INT C GEOT VIENN
[3]  
*ASTM, 4595 ASTM
[4]  
BLIVET JC, 1992, EARTH REINFORCEMENT, V1, P35
[5]  
CHRISTOPHER BR, 1989, REINFORCED SOIL STRU, V1
[6]  
FINNIGAN JA, 1977, P INT C US FABR GEOT, V2, P305
[7]  
Greenwood J.H., 1990, P 4 INT C GEOTEXTILE, P645
[8]  
HOLTZ RD, 1982, P 2 INT C GEOT IFAI, V3, P805
[9]  
Koerner, 1994, DESIGNING GEOSYNTHET
[10]   REMAINING TECHNICAL BARRIERS TO OBTAINING GENERAL ACCEPTANCE OF GEOSYNTHETICS [J].
KOERNER, RM ;
HSUAN, Y ;
LORD, AE .
GEOTEXTILES AND GEOMEMBRANES, 1993, 12 (01) :1-52