Title

Performance Of Benchmark Bridge Structures

Abstract

Recent advances in performance-based earthquake engineering stemming from research by the Pacific Earthquake Engineering Research (PEER) Center have made critical assessment of highway bridge seismic vulnerability possible. Performance of the predominant types of reinforced concrete highway bridges is integral to the evaluation of transportation network performance under high-intensity earthquake scenarios. Additionally, probabilistic quantification of bridge response and vulnerability provides insight into the evaluation of current designs and proposed technologies at varying levels of seismic hazard and different site conditions. This paper illustrates the seismic vulnerability of two benchmark reinforced concrete bridge types, typical of new construction in California. Each bridge type has a variety of column designs for different seismic demands. A model of the structures is created that accounts for nonlinear behavior of the columns, deck, abutments, and expansion joints at the abutments. Seismic demand models are then developed using nonlinear time history analysis, including under near-field excitation. Damage in the bridge components is determined from experimental tests and component capacities. Finally, approximate repair costs are estimated from both discrete bridge-level damage states and the assembly of discrete component-level damage states using unit repair cost estimate data. The procedure for the testbed bridges is developed in a modular fashion to allow incorporation of emerging structural components, technologies, and analysis methods. The vulnerability of the base bridge types is presented in this paper as a benchmark with which to compare the use of enhanced performance structural elements, demands due to liquefaction and lateral spreading, and to observe system-level performance due to experimentally calibrated column, abutment, and foundation components from other PEER researchers. Examples are provided that illustrate the incorporation of alternate analysis methods and a fully coupled soil-structure system. © 2007 American Society of Civil Engineers.

Publication Date

12-1-2007

Publication Title

Structural Engineering Research Frontiers

Number of Pages

-

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

DOI Link

https://doi.org/10.1061/40944(249)40

Socpus ID

84890952418 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84890952418

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