Influence of Inelastic Connection on Seismic Response of Triple-tower Suspension Bridge

JIAO Chang-ke, LI Ai-qun

China Journal of Highway and Transport ›› 2013, Vol. 26 ›› Issue (1) : 98-105.

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China Journal of Highway and Transport ›› 2013, Vol. 26 ›› Issue (1) : 98-105.

Influence of Inelastic Connection on Seismic Response of Triple-tower Suspension Bridge

  • JIAO Chang-ke1,2, LI Ai-qun1
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Abstract

Taizhou Bridge was taken as an example to investigate the characteristics of seismic response of the triple-tower bridge and the influence of inelastic connections on the seismic response of the bridge. 3D finite element model with beam element was established based on ABAQUS and the nonlinear static analysis was carried out to get the initial equilibrium state of the bridge before the dynamic analysis was performed. The results indicate that the peak axial forces of the girder exhibit a symmetrical linear distribution about the mid-tower; the change in the transverse shear forces of the girder is smaller than that in vertical shear forces; the distribution of vertical moments is relative uniform along the length of the girder; the transverse moments of the girder are larger than vertical moments; the dramatic change of the transverse moments is observed and the vertical shear forces and moments of the girder get their maximum values at the section near mid-tower. Inelastic connections (IECs) can significantly reduce the relative displacement between the girder and the tower in the longitudinal direction; the relative displacements between the girder and the tower at the side-tower and the shear forces at the side-tower in the longitudinal direction all vary linearly with the initial stuffiness of the IECs; the axial forces of girder near the end of girder increase with the initial stiffness of IECs and the minimum value moves toward mid-tower; and the inelastic connections between girder and tower with reasonable parameters can lead to significant reduction of the seismic response.

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bridge engineering / triple-tower suspension bridge / finite element method / seismic response / seismic response reduction measure / inelastic connection

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JIAO Chang-ke, LI Ai-qun. Influence of Inelastic Connection on Seismic Response of Triple-tower Suspension Bridge[J]. China Journal of Highway and Transport, 2013, 26(1): 98-105

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