Experimental study on cyclic shear softening characteristics of gravel−geogrid interface
In order to study the softening characteristics of gravel-geogrid interface during and after cyclic shearing, a series of displacement controlled monotonic direct shear tests, cyclic direct shear tests with 2 000 cycles and post cyclic direct shear tests were carried out on the gravel-geogrid interf...
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| Format: | Article |
| Language: | English |
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SCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717
2021-06-01
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| Series: | Rock and Soil Mechanics |
| Subjects: | |
| Online Access: | http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2020.6692 |
| _version_ | 1811313661092823040 |
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| author | LIU Fei-yu JIANG Huai WANG Jun |
| author_facet | LIU Fei-yu JIANG Huai WANG Jun |
| author_sort | LIU Fei-yu |
| collection | DOAJ |
| description | In order to study the softening characteristics of gravel-geogrid interface during and after cyclic shearing, a series of displacement controlled monotonic direct shear tests, cyclic direct shear tests with 2 000 cycles and post cyclic direct shear tests were carried out on the gravel-geogrid interface using dynamic direct shear apparatus. The shear strength characteristics, volume change behavior, shear stiffness and damping ratio of the gravel-geogrid interface under four groups of normal stresses of 20, 40, 60 and 80 kPa were studied. The direct shear characteristics of the gravel-geogrid interface before and after cyclic shear were compared and analyzed. The results show that: in the cyclic direct shear test, the average peak shear stress of gravel-geogrid interface first increases and then decreases, and finally tends to be stable with the increase of number of cycles, and the interface shows shear softening characteristics; the vertical displacement increment of gravel-geogrid interface decreases gradually with the increase of number of cycles; the shear stiffness first increases and then decreases with the increase of number of cycles, and finally tends to be stable; the damping ratio first decreases and then increases with the increase of number of cycles, and finally tends to be stable; under the same normal stress, the peak shear stress increases and the residual shear stress decreases in the cyclic direct shear test compared with the monotonic direct shear test; the cyclic shear makes the interface cohesion increase significantly and the internal friction angle decrease. |
| first_indexed | 2024-04-13T10:57:46Z |
| format | Article |
| id | doaj.art-4ee24255a842470fbc74b67fa840b2f8 |
| institution | Directory Open Access Journal |
| issn | 1000-7598 |
| language | English |
| last_indexed | 2024-04-13T10:57:46Z |
| publishDate | 2021-06-01 |
| publisher | SCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717 |
| record_format | Article |
| series | Rock and Soil Mechanics |
| spelling | doaj.art-4ee24255a842470fbc74b67fa840b2f82022-12-22T02:49:29ZengSCIENCE PRESS , 16 DONGHUANGCHENGGEN NORTH ST, BEIJING, PEOPLES R CHINA, 100717Rock and Soil Mechanics1000-75982021-06-014261485149210.16285/j.rsm.2020.6692Experimental study on cyclic shear softening characteristics of gravel−geogrid interfaceLIU Fei-yu0JIANG Huai1WANG Jun 2Department of Civil Engineering, Shanghai University, Shanghai 200444, China Department of Civil Engineering, Shanghai University, Shanghai 200444, China College of Architecture and Civil Engineering, Wenzhou University, Wenzhou, Zhejiang 325035, ChinaIn order to study the softening characteristics of gravel-geogrid interface during and after cyclic shearing, a series of displacement controlled monotonic direct shear tests, cyclic direct shear tests with 2 000 cycles and post cyclic direct shear tests were carried out on the gravel-geogrid interface using dynamic direct shear apparatus. The shear strength characteristics, volume change behavior, shear stiffness and damping ratio of the gravel-geogrid interface under four groups of normal stresses of 20, 40, 60 and 80 kPa were studied. The direct shear characteristics of the gravel-geogrid interface before and after cyclic shear were compared and analyzed. The results show that: in the cyclic direct shear test, the average peak shear stress of gravel-geogrid interface first increases and then decreases, and finally tends to be stable with the increase of number of cycles, and the interface shows shear softening characteristics; the vertical displacement increment of gravel-geogrid interface decreases gradually with the increase of number of cycles; the shear stiffness first increases and then decreases with the increase of number of cycles, and finally tends to be stable; the damping ratio first decreases and then increases with the increase of number of cycles, and finally tends to be stable; under the same normal stress, the peak shear stress increases and the residual shear stress decreases in the cyclic direct shear test compared with the monotonic direct shear test; the cyclic shear makes the interface cohesion increase significantly and the internal friction angle decrease.http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2020.6692direct shear testshear stressshear stiffnessdamping ratio |
| spellingShingle | LIU Fei-yu JIANG Huai WANG Jun Experimental study on cyclic shear softening characteristics of gravel−geogrid interface Rock and Soil Mechanics direct shear test shear stress shear stiffness damping ratio |
| title | Experimental study on cyclic shear softening characteristics of gravel−geogrid interface |
| title_full | Experimental study on cyclic shear softening characteristics of gravel−geogrid interface |
| title_fullStr | Experimental study on cyclic shear softening characteristics of gravel−geogrid interface |
| title_full_unstemmed | Experimental study on cyclic shear softening characteristics of gravel−geogrid interface |
| title_short | Experimental study on cyclic shear softening characteristics of gravel−geogrid interface |
| title_sort | experimental study on cyclic shear softening characteristics of gravel geogrid interface |
| topic | direct shear test shear stress shear stiffness damping ratio |
| url | http://rocksoilmech.whrsm.ac.cn/EN/10.16285/j.rsm.2020.6692 |
| work_keys_str_mv | AT liufeiyu experimentalstudyoncyclicshearsofteningcharacteristicsofgravelgeogridinterface AT jianghuai experimentalstudyoncyclicshearsofteningcharacteristicsofgravelgeogridinterface AT wangjun experimentalstudyoncyclicshearsofteningcharacteristicsofgravelgeogridinterface |