Effect of bearing model on the seismic response of curved continuous girder bridge
LI Zheng-ying1.2,JIANG Lin-jun1,LI Zheng-liang1.2
1.College of Civil Engineering, Chongqing University, Chongqing400030,China;2.Key Laboratory of New Technology for Construction of Cities in Mountain Area,Chongqing University,Ministry of Education, Chongqing 400030,China
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.
李正英.;蒋林均;李正良.. 曲线连续梁桥支座模型对结构地震反应影响分析[J]. 振动与冲击, 2015, 34(2): 182-186.
LI Zheng-ying.;JIANG Lin-jun;LI Zheng-liang.. Effect of bearing model on the seismic response of curved continuous girder bridge. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(2): 182-186.