A Study on Seismic Behavior and Displacement Control of a Continuous Girder Bridge with Low Friction Sliding Bearing Support

Abstract eng:
Authors have shown the superiority using the low friction sliding bearing support (LFSBS) for continuous girder bridges by the seismic response analysis and shake table test using small steel girder bridge model. This paper inspects the validity of this system by the seismic response analysis for an existing three span continuous steel girder bridge with seven different bearing supports conditions. Accelerations, displacements, bending moments and curvatures are calculated and compared each other. It became clear that in the bridge with LFSBS piers vibrate independently from girder, and curvature at the bottom of the pier becomes very small compared to those of the ordinal support type bridge. The effect of damper installed between end of the girder and abutment to reduce the large displacement of the girder is also clarified.

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