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| Research on Seismic Isolation Design of Multi - span Rigid Frame – continuous Girder Bridge in High Seismic Intensity Area |
| LIU Jun |
| China Railway Fifth Survey and Design Institute Group Co. Ltd, Beijing 102600, China |
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Abstract Research purposes: Combined with construction of a (48 + 4*80 + 48 ) m rigid frame - continuous girder bridge in a high seismic intensity area, the effects of applying the fluid viscous damper, lock - up device, double spherical seismic isolation bearing and shock absorber to the long multi - span rigid frame - continuous girder bridge are analyzed and compared respectively, and the main parameters that affect to the effect of seismic isolation design are discussed to provide the basis for the reasonable selection of seismic isolation measures.
Research conclusions :(1) It is necessary to make the seismic design for the long multi - span rigid frame - continuous girder bridge in a high seismic intensity area because the seismic response to the rigid frame pier is rather big. (2) The analysis results show that the four seismic isolation measures of using the fluid viscous damper, lock – up device double spherical seismic isolation bearing and shock absorber have their own advantages and disadvantages. The first two measures are only available for the bridge in longitudinal direction. The latter two measures are available for the bridge in both longitudinal direction and in transverse direction. (3) Reasonably selecting seismic isolation measure and its main parameters is very important to the seismic design of long multi - span rigid frame - continuous girder bridges in a high seismic intensity area. (4) The research results can be used in guiding for seismic design of bridge.
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Received: 19 November 2012
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2013, Vol. 30 
