Similarity method and model design method for dynamic model tests of bridge tower under wave action

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (7) : 119-125.

WEI Chengxun1, ZHOU Daocheng2, ZHANG Jian3, XUE Sisi2

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Abstract

Aiming at the study method of wave action dynamic model test of bridge tower structure of a cross sea bridge, the similarity method and model design method for dynamic model test of bridge tower structure were proposed by analyzing the similarity principle of dynamic model test of underwater structure. Then, a dynamic model of tower structure of a large-scale sea-crossing cable-stayed bridge was designed and manufactured, and structural dynamic characteristics tests and wave action dynamic response tests were conducted with the test model. Dynamic model test results showed that the structure main natural frequency measured with tests is close to that designed for the original structure, the test model structure can better simulate natural vibration characteristics of the original structure; base forces and dynamic responses of the model structure agree well with the corresponding numerical results of the original structure; the test results verify the feasibility of the proposed model test similarity method and model design method, they have application and reference significance for the hydro-elastic model test research of cross sea bridge structure.

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bridge tower / wave action / dynamic model test / similarity method / model design

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WEI Chengxun1, ZHOU Daocheng2, ZHANG Jian3, XUE Sisi2. Similarity method and model design method for dynamic model tests of bridge tower under wave action[J]. Journal of Vibration and Shock, 2021, 40(7): 119-125

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