A Study on the Seismic Isolation Systems of Bridges with Lead Rubber Bearings

Woo-Suk Kim, Dong-Joon Ahn, Jong-Kook Lee

School of Architecture, Kumoh National Institute of Technology, Gumi, Republic of Korea.

DOI: 10.4236/ojce.2014.44031                

Abstract

This study consists of the development and presentation of example of seismic isolation system analysis and design for a continuous, 3-span, cast-in-place concrete box girder bridge. It is expected that example is developed for all Lead-Rubber Bearing (LRB) seismic isolation system on piers and abutments which placed in between super-structure and sub-structure. Design forces, displacements, and drifts are given distinctive consideration in accordance with Caltrans Seismic Design Criteria (2004). Most of all, total displacement on design for all LRBs case is reduced comparing with combined lead-rubber and elastomeric bearing system . Therefore, this represents substantial reduction in cost because of reduction of expansion joint. This presents a summary of analysis and design of seismic isolation system by energy mitigation with LRB on bridges.

Keywords

Seismic Isolation System, Bridge, Lead Rubber Bearing (LRB), Energy Mitigation

Conflicts of Interest

The authors declare no conflicts of interest.

References

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