JOURNAL OF SHANDONG UNIVERSITY (ENGINEERING SCIENCE) ›› 2010, Vol. 40 ›› Issue (4): 102-107.

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Hydrodynamic pressure effects analysis of large bridge grouppiles foundation under  earthquakes

LI Fu-rong1,2, HE Shan1, WANG Zhi-hua2   

  1. 1. College of Civil Engineering, Yancheng Institute of Technology, Yancheng 224051, China;
    2. Institute of Geotechnical Engineering, Nanjing University of Technology, Nanjing 210009, China
  • Received:2010-04-22 Online:2010-08-16 Published:2010-04-22

Abstract:

Taking the large group piles foundation of the Changjiang River Road Bridge as a research project, and computing on  ABAQUS finite element software, and using the added water mass method to consider the effects of hydrodynamic pressure, the seismic response of the bridge group-piles was calculated numerically by the whole finiteelement method, three earthquake waves with different spectra was selected,  dynamic nonlinear characteristics of soils and concrete was considered, and the hydrodynamic pressure effect of the large group piles foundation for bridge on deep overburden layers was analyzed. The results showed that hydrodynamic pressure effect changed the seismic responses characters of the group piles foundation, which had the impact on the acceleration, displacement and inner force of the pile. It  complies much more with the actual situation considering the hydrodynamic pressure effect in the seismic design of a large bridge foundation.

Key words:  Morison equation, hydrodynamic pressure, earthquake, hydrodynamic , mass, group piles

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