干旱区生态环境知识资源中心(Arid): Centrifuge test of dry sand and saturated sand ground seismic response under earthquake sequence

Arid

DOI	10.16285/j.rsm.2020.0046
	Centrifuge test of dry sand and saturated sand ground seismic response under earthquake sequence
	Wu Xiao-feng; Wang Yu-bing; Zhu Bin
通讯作者	Wu, XF (corresponding author), Zhejiang Univ, Key Lab Soft Soils & Geoenvironm Engn, Minist Educ, Hangzhou 310058, Zhejiang, Peoples R China. ; Wu, XF (corresponding author), Zhejiang Univ, Inst Geotech Engn, Hangzhou 310058, Zhejiang, Peoples R China.
来源期刊	ROCK AND SOIL MECHANICS
ISSN	1000-7598
出版年	2020
卷号	41 期号:10 页码:3385-3394
英文摘要	The load of marine environment is complex and unpredictable. The soil around the foundation of offshore structure is the main bearing body, which is greatly affected by the earthquake. There are a large number of sand layers in the coastal areas which have been built or are planned to be built in China. Compared with the desert Gobi area, the dynamic characteristics of the soil around the piles are significantly different. The existing studies mainly consider the evolution of soil mechanical properties under a single earthquake, and little attention is paid to the influence of earthquake sequence and earthquake history on the dynamic characteristics of soil around the foundation. With the use of the ZJU-400 centrifuge shaking table, this paper carried out a centrifuge modeling test in dry sand and saturated sand grounds, and compared the dynamic response of soil around the pile in two grounds under the earthquake. It is found that the natural frequency of saturated foundation is obviously affected by the historical effect of earthquake, while that of the dry sand ground is not. The strong pile-soil interaction can accelerate the development of excess pore pressure around the pile. Due to the historical effect of earthquake, the dilatancy characteristics of soil are gradually strengthened, the accumulation and development process of excess pore pressure around the pile is gradually slowed down, and the dissipation process becomes faster. Saturated sand ground has the characteristics of low frequency amplification and high frequency weakening. The historical effect of earthquake has no significant effect on the amplification factor of soil in dry sand ground, but for saturated ground, the amplification coefficient of soil shows an obvious increase. In the saturated sand ground, the shear modulus of soil around the pile is more affected by the excess pore pressure than the shear strain. During the shaking, the modulus gradually decreases without the phenomenon of gradual recovery in the dry sand ground.
英文关键词	earthquake sequence earthquake history effect soil around pile centrifuge shaking table
类型	Article
语种	中文
收录类别	ESCI
WOS记录号	WOS:000607937500021
WOS关键词	SHEAR MODULUS ; HISTORY ; STRESS
WOS类目	Engineering, Geological
WOS研究方向	Engineering
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/352687
作者单位	[Wu Xiao-feng; Wang Yu-bing; Zhu Bin] Zhejiang Univ, Key Lab Soft Soils & Geoenvironm Engn, Minist Educ, Hangzhou 310058, Zhejiang, Peoples R China; [Wu Xiao-feng; Zhu Bin] Zhejiang Univ, Inst Geotech Engn, Hangzhou 310058, Zhejiang, Peoples R China; [Wang Yu-bing; Zhu Bin] Zhejiang Univ, Ctr Hypergrav Expt & Interdisciplinary Res, Hangzhou 310058, Zhejiang, Peoples R China
推荐引用方式 GB/T 7714	Wu Xiao-feng,Wang Yu-bing,Zhu Bin. Centrifuge test of dry sand and saturated sand ground seismic response under earthquake sequence[J],2020,41(10):3385-3394.
APA	Wu Xiao-feng,Wang Yu-bing,&Zhu Bin.(2020).Centrifuge test of dry sand and saturated sand ground seismic response under earthquake sequence.ROCK AND SOIL MECHANICS,41(10),3385-3394.
MLA	Wu Xiao-feng,et al."Centrifuge test of dry sand and saturated sand ground seismic response under earthquake sequence".ROCK AND SOIL MECHANICS 41.10(2020):3385-3394.