Effect of bearing model on the seismic response of curved continuous girder bridge

LI Zheng-ying.;JIANG Lin-jun;LI Zheng-liang.

Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (2) : 182-186.

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PDF(1821 KB)
Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (2) : 182-186.

Effect of bearing model on the seismic response of curved continuous girder bridge

  • LI Zheng-ying1.2,JIANG Lin-jun1,LI Zheng-liang1.2
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Abstract

Teflon slide rubber bearing is often used on bridge. The ideal expansion bearing element is usually adopted to simulate this rubber bearing in analysis. This ideal expansion bearing model will ignore friction between Teflon layer and steel surface. This paper takes one curved continuous girder bridge as an example, and employs bilinear sliding bearing element and friction isolator elements to simulate Teflon slide bearings on this bridge. Nonlinear dynamic analysis results show that seismic responses of bridge in which the slide rubber bearings are modeled as ideal expansion bearing elements are overestimated. Seismic responses of bridge adopting bilinear sliding bearing model is similar to that of bridge adopting friction isolator model. Friction isolator can consider the varying friction force of bearing, so using this model to simulate Teflon slide rubber bearing is accordance with the actual case.


Key words

slide rubber bearing / continuous girder bridge / bilinear sliding bearing element / friction isolator element

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LI Zheng-ying.;JIANG Lin-jun;LI Zheng-liang.. Effect of bearing model on the seismic response of curved continuous girder bridge[J]. Journal of Vibration and Shock, 2015, 34(2): 182-186
PDF(1821 KB)

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