Engineering Mechanics ›› 2013, Vol. 30 ›› Issue (3): 120-125.doi: 10.6052/j.issn.1000-4750.2011.11.0735

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INFLUENCE OF TRAVELING WAVE EFFECT ON SEISMIC RESPONSES OF CONTINUOUS RIGID-FRAMED BRIDGE IN DEEP WATER

LI Zhong-xian1,2 , HUANG Xin1,2   

  1. "(1. School of Civil Engineering, Tianjin University, Tianjin 300072, China; 2. Key Laboratory of Coast Civil Structure Safety (Tianjin University), Ministry of Education, Tianjin 300072, China) "
  • Online:2013-03-25 Published:2013-03-25
  • Contact: LI Zhong-Xian

Abstract:

Water-bridge-pier dynamic interactions should be considered in the earthquake response analysis of bridges located in the sea or reservoir area, and the traveling wave effect also cannot be ignored for long-span bridge structures. The hydrodynamic pressure formulary of bridge piers is solved using radiation wave theory, and a seismic response analysis method of bridges in deep water is established, which can consider the spatial effect of a ground motion input. The earthquake response analysis about a continuous rigid-framed bridge is made, considering the traveling wave effect. The results indicate that: dynamic responses of a bridge in deep water is augmented because of hydrodynamic pressure action, and the influence of hydrodynamic pressure on seismic responses of a bridge in deep water is changed with different earthquake wave excitations and constraint conditions about a pier-box girder. The effect of hydrodynamic pressure on the earthquake response of a bridge in deep water is different, considering traveling waves relative to a uniform excitation, which is also changed with apparent wave velocity when the traveling wave effect is considered. In conclusion, the traveling wave effect should be considered in seismic response analyses of long and huge bridges in deep water under hydrodynamic pressure actions.

Key words: bridges in deep water , earthquake action , earthquake induced hydrodynamic pressure , radiation wave theory , traveling wave effect

CLC Number: 

  • U442.5
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