Title

Cost-Effectiveness Of Seismic Isolation And Fiber-Reinforced Concrete In Typical Bridge Construction In California

Abstract

The cost-effectiveness of innovative performance-enhancing technologies, such as seismic isolation of bridge superstructure or use of fiber-reinforced concrete materials for the construction of bridge piers, for typical highway overpass bridges in California, is investigated in this paper. A typical five-span, singlecolumn bent reinforced concrete bridge was redesigned using these two performance enhancement strategies and modeled in OpenSees. The modeling schemes, as well as the static and dynamic analysis results of these bridge systems, are presented in a companion paper. The PEER performance-based earthquake engineering methodology was used for the computation of postearthquake repair cost and time of the bridges. Fragility curves displaying the probability of exceeding a specific repair cost and time thresholds were developed. The total cost of the bridges included the cost of new construction and post-earthquake repair cost required for a 75 year design life of the structures. The intensity-dependent repair time loss model of the different bridges was computed in terms of crew working days representing repair efforts. A financial analysis was performed that accounted for a wide range of discount rates and confidence intervals in the estimation of the mean annual post-earthquake repair cost. Despite slightly higher initial construction costs, considerable economic benefits and structural improvements were obtained from the use of the two enhancement techniques considered, especially seismic isolation, in comparison to the fixedbase conventionally reinforced concrete bridge. The repair time of the isolated bridges was also significantly reduced.

Publication Date

12-1-2010

Publication Title

9th US National and 10th Canadian Conference on Earthquake Engineering 2010, Including Papers from the 4th International Tsunami Symposium

Volume

4

Number of Pages

2732-2741

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

84867185331 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84867185331

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