Abstract
In lack of seismic provisions in the pre-Eurocode ages, most of the existing Hungarian bridges were not designed for seismic actions, therefore their seismic performance is questionable. The most commonly used structural type in highway construction is the integral precast multi-girder bridge. These bridges are typically constructed as continuous multi-support systems with monolithic joints at each support, thus their behavior may be significantly different from those applying simply supported beams and conventional bearings. A parametric fragility analysis of a wide range of different layouts is carried out using detailed and advanced non-linear numerical models. The results indicate that the abutment joints are highly vulnerable and piers are also critical for longer bridges. The study implies that without seismic design, integral precast multi-girder bridges are highly susceptible to pier shear failure, the probability of collapse is relatively high. The results also provide a solid basis for retrofit planning as well as for development of design concepts of newly built structures in moderate seismic zones.
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Acknowledgments
This paper was supported by the János Bolyai Research Scholarship of the Hungarian Academy of Sciences. The data of the existing bridge database was provided by the Hungarian Transportation Administration for which the authors also express their gratitude.
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Simon, J., Vigh, L.G. Seismic fragility assessment of integral precast multi-span bridges in areas of moderate seismicity. Bull Earthquake Eng 14, 3125–3150 (2016). https://doi.org/10.1007/s10518-016-9947-y
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DOI: https://doi.org/10.1007/s10518-016-9947-y