Dynamic and Residual Pore Water Pressure Response of Hybrid Foundation System Under Combined Action of Wind, Wave and Seismic Loading

Authors

  • Jiang Yang
    Affiliation
    Hubei Key Laboratory of Earthquake Early Warning, Hubei Earthquake Agency, Wuhan 430071, China Wuhan Institute of Seismic Instruments Co., Ltd., Xianning 437100, China Engineering Technology Research Center for Earthquake Monitoring and Early Warning Disposal of Major Projects in Hubei Province, Xianning 437100, China
  • Dingfeng Zhao
    Affiliation
    Shanghai Waterway Engineering Design and Consulting Co., Ltd., Shanghai 200120, China
  • Tao Fan
    Affiliation
    Hubei Key Laboratory of Earthquake Early Warning, Hubei Earthquake Agency, Wuhan 430071, China Wuhan Institute of Seismic Instruments Co., Ltd., Xianning 437100, China Engineering Technology Research Center for Earthquake Monitoring and Early Warning Disposal of Major Projects in Hubei Province, Xianning 437100, China
  • Tian Sun
    Affiliation
    College of Transportation Engineering, Nanjing Tech University, Nanjing, Jiangsu 210009, China Jiangsu Sunpower Technology Co., Ltd., Nanjing 210009, China
https://doi.org/10.3311/PPci.21001

Abstract

The dynamic response characteristics of the innovative marine wind power hybrid foundation under combined action of wind, wave and seismic loading are studied in this article. Taking the monopile foundation as reference group, the shearing strain-volumetric strain coupled pore pressure incremental constitutive model was utilized to simulate the kinetic behavior of seabed’s saturated soil. The pressure distribution and variation characteristics of residual pore water pressure around pile foundation due to the interactions of upper structure, foundation and saturated soil are illustrated. The results indicate that: (a) the cylindrical platform changes the residual pore water pressure and accelerates the pressure accumulation area, which converts from surrounding the monopile to nearby the cylindrical platform; (b) compared to the hybrid foundation, the peak value of residual pore water accumulation of the monopile foundation is smaller only under seismic loading, which is due to that the monopole with smaller stiffness is more vulnerable to deform with soil synergistically; (c) the cylindrical platform structure can significantly reduce the horizontal placement extreme of pile foundation under the action of dynamic load, and can also change the distribution characteristics of bending moment of middle pile of the hybrid foundation. It is manifested by a lower bending moment extreme of the middle pile near the mudline under the action of wind and wave loading, while the seismic loading could increase the bending moment extreme of middle pile near the mudline.

Keywords:

hybridpile foundation, pore water pressure, saturated soil, dynamic response, numerical simulation

Citation data from Crossref and Scopus

Published Online

2023-01-11

How to Cite

Yang, J., Zhao, D., Fan, T., Sun, T. “Dynamic and Residual Pore Water Pressure Response of Hybrid Foundation System Under Combined Action of Wind, Wave and Seismic Loading”, Periodica Polytechnica Civil Engineering, 67(1), pp. 141–151, 2023. https://doi.org/10.3311/PPci.21001

Issue

Section

Research Article