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| Influence of side retainers on the transverse anti-seismic system for a cable-stayed bridge |
Xu Lue-qin; Li Jian-zhong
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| State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China |
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Abstract In combination with Daxie Bridge in Ningbo, effect of side retainers on the lateral anti-seismic system for a cable-stayed bridge is investigated. Nonlinear time history analysis method is utilized to obtain the seismic response of Daxie Bridge in correspondence with three conditions, i.e. structural response excluding retainer influences, structural response incorporating retainer influences, and structural response considering the effects of damage of the retainers. It is found that the pounding effects between girder and retainer are effective to reduce the earthquake response of the auxiliary piers, which usually governs the design of cable-stayed bridges in the transverse direction. Damage of retainers will amplify the lateral displacement of the girder, which is not expected to happen for cable-stayed bridges. It is efficient to diminish the seismic response of bridge structure, to restrain the displacement of girder and to protect the bearings from earthquake when dampers are mounted on the side piers, which will, however, increase the cost and cause design problems. Recommendations are made to choose strong retainers with sufficient strength to survive severe ground motions as a useful measure for the cable-stayed bridge.
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Received: 05 August 2010
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Corresponding Authors:
Xu Lue-qin
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2011, Vol. 30 
