Cable-beam related vibration of a long span railway cable-stayed bridge

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (17) : 103-114.

WANG Tao, LIU Degui, HUANG Hui

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Abstract

Here, cable-beam related vibration of a long span railway cable-stayed bridge under external dynamic forces was studied.A nonlinear finite element (FE) dynamic time-history integration method was developed to compile a FE calculation program.Taking Tianxingzhou bridge in China as the study object, a 2-D full bridge FE model was built to study cable-beam related vibration characteristics of the bridge and resonance conditions of cable under ideal external excitation, and analyze effects of train-bridge coupled dynamic action on cable when train passing the bridge under different working conditions.The results showed that for a long span railway cable-stayed bridge, when its cable-beam related vibration happens, longer cables of the bridge are easy to have nonlinear vibration with large amplitude, cable’s 1∶1 main resonance is easier to happen, while the appearing possibility of its 2∶1 parametric resonance is smaller; train dynamic actions can’t make cable reach resonance condition to cause cable’s large amplitude vibration.

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cable-stayed bridge / train-bridge coupled vibration / nonlinear vibration of cables / cable-beam vibration / finite element method

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WANG Tao, LIU Degui, HUANG Hui. Cable-beam related vibration of a long span railway cable-stayed bridge[J]. Journal of Vibration and Shock, 2019, 38(17): 103-114

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