Resonant column tests on maximum shear modulus and damping ratio of coral sand
LI Xiao-mei1, WANG Fang1, HAN Lin2, GUAN Yun-fei1, ZHAN Xin-jie1
1. Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, Nanjing 210024, China; 2. College of Mechanics and Materials, Hohai University, Nanjing 211100, China
Abstract：The resonant column tests on the effects of relative density and confining pressure on the maximum modulus and damping ratio of coral sand in South China Sea under small strain are performed. The test results show that, for the samples with the same relative density, the maximum shear modulus of coral sand increases with the increasing confining pressure, while the damping ratio decreases with the increasing confining pressure. For the samples under the same condition of confining pressure, the maximum shear modulus of coral sand increases with the increasing relative density, while the damping ratio decreases with the increasing relative density. Based on the test data, the variation rules of the maximum shear modulus and damping ratio of coral sands considering confining pressure and relative density are established, which can provide the basic data and technical support for infrastructure construction in the coral sand areas of South China Sea.
李小梅, 王芳, 韩林, 关云飞, 占鑫杰. 珊瑚砂最大剪切模量和阻尼比的共振柱试验研究[J]. 岩土工程学报, 2020, 42(S1): 60-64.
LI Xiao-mei, WANG Fang, HAN Lin, GUAN Yun-fei, ZHAN Xin-jie. Resonant column tests on maximum shear modulus and damping ratio of coral sand. Chinese J. Geot. Eng., 2020, 42(S1): 60-64.
[1] 陈国兴, 朱翔, 赵丁凤, 等. 珊瑚岛礁场地非线性地震反应特征分析[J]. 岩土工程学报, 2019, 41(3): 405-413. (CHEN Guo-xing, ZHU Xiang, ZHAO Ding-feng, et al.Nonlinear seismic response characteristics of a coral island site[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(3): 405-413. (in Chinese)) [2] QIU Tong, HUANG Yan-bo.Analytical and experimental studies on Biot flow-induced damping in saturated soil specimens in resonant column tests[J]. International Journal of Geomechanics, 2017, 17(8): 1-8. [3] SENETAKISA Kostas, HE Huan.Dynamic characterization of a biogenic sand with a resonant column of fixed-partly fixed boundary conditions[J]. Soil Dynamics and Earthquake Engineering, 2017(95): 180-187. [4] 柏立懂, 项伟, SAVIDIS A Stavros, 等. 干砂最大剪切模量的共振柱与弯曲元试验[J]. 岩土工程学报, 2012, 34(1): 184-188. (BAI Li-dong, XIANG Wei, SAVIDIS A Stavros, et al.Resonant column and bender element tests on maximum shear modulus of dry sand[J]. Chinese Journal of Geotechnical Engineering, 2012, 34(1): 184-188. (in Chinese)) [5] 李剑, 陈善雄, 姜领发, 等. 重塑红黏土动剪切模量与阻尼比的共振柱试验[J]. 四川大学学报(工程科学版), 2013, 45(4): 62-68. (LI Jian, CHEN Shan-xiong, JIANG Ling-fa, et al.Resonant column test on dynamic shear modulus and damping ratio of the remolded red clay[J]. Journal of Sichuan University (Engineering Science Edition), 2013, 45(4): 62-68. (in Chinese)) [6] 蔡晓光, 黄鑫, 孟凡超, 等. 中线法底流尾矿砂的共振柱试验研究[J].地震工程与工程振动, 2016, 36(6): 30-37. (CAI Xiao-guang, HUANG Xin, MENG Fan-chao, et al.The resonant column test study of the central line under flow tailing sands[J]. Earthquake Engineering and Engineering Dynamics, 2016, 36(6): 30-37. (in Chinese)) [7] 徐洁, 赵文博, 陈永辉, 等. 非饱和黄土初始剪切模量与孔径分布试验研究[J]. 岩土工程学报, 2017, 39(增刊1): 227-231. (XU Jie, ZHAO Wen-bo, CHEN Yong-hui, et al.Experimental study on initial shear modulus and pore-size distribution of unsaturated loess[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(S1): 227-231. (in Chinese)) [8] Papakonstantinou, CHRISTOS G.Resonant column testing on portland cement concrete containingrecycled asphalt pavement (RAP) aggregates[J]. Construction and Building Materials, 2018(173): 419-428.
