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Structural Engineering and Mechanics
  Volume 82, Number 4, May25 2022 , pages 491-502
DOI: https://doi.org/10.12989/sem.2022.82.4.491
 


Dynamic responses of a freestanding bridge tower under wave and wave-current loads
Chengxun Wei, Wenjing Wang and Daocheng Zhou

 
Abstract
    A model experiment with a scale of 1:150 has been conducted to investigate the dynamic responses of a freestanding four-column bridge tower subjected to regular wave, random wave and coupled wave-current actions. The base shear forces of the caisson foundation and the dynamic behaviors of the superstructure were measured and analyzed. The comparisons of the test values with the theoretical values shows that wave-induced base shear forces on the bridge caisson foundation can be approximated by using a wave force calculation method in which the structure is assumed to be fixed and rigid. Although the mean square errors of the base shear forces excited by joint random wave and current actions are approximately equal to those excited by pure random waves, the existence of a forward current increases the forward base shear forces and decreases the backward base shear forces. The tower top displacements excited by wave-currents are similar to those excited by waves, suggesting that a current does not significantly affect the dynamic responses of the superstructure of the bridge tower. The experiment results can be used as a reference for similar engineering design.
 
Key Words
    bridge tower; dynamic response; experiment; wave; wave and current
 
Address
Chengxun Wei, Wenjing Wang: School of Civil Engineering, Guangxi University of Science and Technology, 268 Donghuan-ro, Liuzhou City, Guangxi Province, China
Daocheng Zhou: School of Civil Engineering, Dalian University of Technology, 2 Linggong-ro, Dalian City, Liaoning Province, China
 

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