Development of Seismic Design Detail Fro Accelerated Bridge Construction


Abstract eng:
In the bridge engineering community, increasing attention has been paid to prefabricated bridge construction to accelerate the on-site bridge construction by shifting most of the construction process into precast factory or yard. When compared to conventional bridge construction, the advantages of accelerated bridge construction (ABC) include reducing traffic disruption, minimizing accidents in the work zone, maintaining construction quality and minimizing the life-cycle cost and environmental impact. In spite of the many advantages aforementioned, the use of accelerated bridge construction in high seismic region is still limited. The main reason has been the skepticism on seismic resistance of prefabricated bridges because of the presence of precast joints. To promote this type of bridge construction, the Federal Highway Administration (FHWA) has initiated a research project. The research primarily focuses on studying the performance of precast concrete piers and prefabricated superstructure systems constructed in seismic zones, and providing solutions that can lead to wide spread use of accelerated bridge systems in seismic zones. Recently, the FHWA has issued a manual of connection detail manual for using Accelerated Bridge Construction and have been used widely in the non-seismic area. This paper will present and discuss the result of the research on precast piers and some other related studies in seismic connection details, including bridge segmental columns between segments, substructure and superstructure connection joints, connection between precast girders and pier. The analytical models for seismic analysis of precast concrete piers including simplified analytical model and detailed finite element model will be introduced. The proposed connection details of segmental bridge piers were tested by using shake-table with large scaled bridge models. The use of un-bonded tendons has been proven to be capable of delaying or avoiding the yielding of the tendons, thus preserving the necessary clamping force and re-centering capability. To enhance the seismic energy dissipation, bonded longitudinal mild steel bars are provided in the prototype column studied in this paper. Moreover, this paper discusses the results of a parametric study on the amount of mild steel added and observes any correlation with the energy dissipation and residual displacement (recentering capability). Summary remarks and conclusions are provided at the end of the paper..

Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.



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 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 4044.:
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