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| Study on the Reasonable Transverse Constraint System for Transitional Pier of Cable-stayed Bridge |
| YAN Bin1, GONG Wei2 |
| 1. CCCC First Highway Consultants Co. Ltd, Xi’an, Shanxi 710075, China; 2. The Third Railway Survey and Design Institute Group Corporation, Tianjin 300142, China |
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Abstract Research purposes：Under the effect of transverse earthquake, the transitional pier of cable-stayed bridge is one of the weakest links in seismic design, so it is necessary to study the reasonable transverse constraint system for the transitional pier. Taking the Nancha main bridge of Xiamen-Zhangzhou Sea-crossing Bridge as an example, the studies are done on the effect of three transverse constraint systems (fixed system, free system, and block system) on transverse seismic performance of cable-stayed bridge in view of promoting the transverse seismic performance of cable-stayed bridge.
Research conclusions： The seismic responses of transitional pier and its foundation are amplified when the fixed system is used. Although the seismic responses of transitional pier and its foundation can be reduced when the free system is used, but the relative transverse displacement between transitional pier and girder is over big. The seismic responses of transitional pier and its foundation can be effectively decreased when the block system is used, and reasonable initial gap of the block can be obtained through analyses of parameters.
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Received: 08 December 2009
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2010, Vol. 27 
