Study on Cyclic Bearing Capacity of Suction Pile Based on Equivalent Cyclic Creep Model

Kang Huang, Wenbo Zhu (), Xin Liu, Zhongyuan Yao, Yu Zhang, Shu Yan, Xiaojiang Guo and Guoliang Dai
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Kang Huang: School of Civil Engineering, Southeast University, Nanjing 210096, China
Wenbo Zhu: School of Civil Engineering, Southeast University, Nanjing 210096, China
Xin Liu: Huaneng Clean Energy Research Institute, Beijing 102209, China
Zhongyuan Yao: Shengdong Rudong Offshore Wind Power Co., Ltd., Nantong 226000, China
Yu Zhang: Shengdong Rudong Offshore Wind Power Co., Ltd., Nantong 226000, China
Shu Yan: Huaneng Clean Energy Research Institute, Beijing 102209, China
Xiaojiang Guo: Huaneng Clean Energy Research Institute, Beijing 102209, China
Guoliang Dai: School of Civil Engineering, Southeast University, Nanjing 210096, China

Sustainability, 2022, vol. 14, issue 22, 1-18

Abstract: In the process of cyclic loading, strain development not only presents the strain softening phenomenon, but also a strain hardening phenomenon, depending on the different values of static deflection stress. The strain hardening and strain softening characteristics of soft clay are studied by cyclic triaxial tests. The test results show that when the static deflection stress is zero, the value of cyclic cumulative strain is small, and the strain development presents the softening phenomenon. When the static deflection stress is greater than zero, the accumulation strain increases with increasing cyclic deflection stress, and the strain development present strain hardening phenomenon. Therefore, a strain softening index and strain hardening index were proposed to describe the cyclic characteristics of soil. Moreover, an equivalent cyclic creep model was established by considering the strain hardening index to describe cyclic characteristics of suction pile. The results obtained using the proposed method are in reasonably good agreement with the measured results. This can provide a new method for analyzing the cyclic characteristics of soil and the suction pile.

Keywords: pile; strain softening; strain hardening; cumulative deformation; cyclic creep model (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2022
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