Lateral deformation of open caisson foundation-soil interaction system subjected to seismic response
CHEN Yang1,2,3, TAN Liu-xin2, ZHAO Wen3, WANG Zhen4, JIA Peng-jiao5
1. State Key Laboratory of Eco-hydraulics in Northwest Arid Region,Xi′an University of Technology,Xi′an 710048,China; 2. Institute of Geotechnical Engineering,Xi′an University of Technology,Xi′an 710048,China; 3. School of Resources & Civil Engineering,Northeastern University,Shenyang 110819,China; 4. 96854 Troop Engineering Project Management Office,Shenyang 110033,China; 5. School of Urban Rail Transportation,Soochow University,Suzhou 215002,China
Abstract：The open caisson foundation is widely used in marine drilling platforms, bridge foundations and wind turbine foundations due to its large bearing capacity and high lateral stability. While the dynamic response of the open caisson foundation under earthquake still remains unclear, the nonlinear dynamic stress-strain relations obtained from the dynamic traxial tests are implanted to numerical software in this study. The lateral dynamic response of the open caisson foundation under different types of site soil, earthquake peak accelerations (PA) is investigated. The results indicate that the relative lateral displacements of structure and site soil increase with the PA linearly and exponentially, respectively. The site soil constrains the caisson foundation when it is in good condition or the PA is relatively small, which means α>1. Vice versa, the structure will be pushed by the foundation soil, which will endanger the stability of the foundation.
陈阳, 谈刘鑫, 赵文, 王振, 贾鹏蛟. 地震作用下沉井-地基相互作用体系侧向位移特征研究[J]. 岩土工程学报, 2021, 43(S1): 229-234.
CHEN Yang, TAN Liu-xin, ZHAO Wen, WANG Zhen, JIA Peng-jiao. Lateral deformation of open caisson foundation-soil interaction system subjected to seismic response. Chinese J. Geot. Eng., 2021, 43(S1): 229-234.
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