Experiments on the cyclic shear behavior of the interface between staggered stacking soilbags
CHEN Shuang1，JIA Fan2，LIU Sihong1，LI Jiajia1
(1. College of Water Conservancy and Hydropower Engineering，Hohai University，Nanjing，Jiangsu 210098，China；2. Department of Structure and Materials，China Institute of Water Resources and Hydropower Research，Beijing 100038，China)
Abstract：The cyclic shear behavior of the interface between soilbags has an important influence on the dynamic stability of soilbags-built structures. In order to study the cyclic shear behavior of the staggered stacking soilbags and the effect of cyclic shear on the interlayer shear strength of the soilbags，a series of large-scale direct shear tests and cyclic shear tests were conducted on the staggered stacking soilbags. The focus is on the effects of the number of cyclic shears，vertical stress，and amplitude of shear displacement during the cyclic shearing process on the dynamic deformation characteristics and shear strength of the staggered stacking soilbags. The results show that the shear failure of the staggered stacking soilbags? interface before and after the cyclic shear follows the Mohr-Coulomb failure criterion. The shear strength of the staggered stacking soilbags′ interface increases after cyclic shear. In the low stress range，the damping ratio of the staggered stacking soilbags′ interface increase with the shear displacement amplitude，and is basically independent of the number of cycles and the vertical stress. Due to the internal embedding effect of the staggered stacking soilbags，the soilbags exhibit recoverability similar to that of laminated rubber bearings during cyclic shearing.
2021, Vol. 40 
