The Assessment of seismic performance of multi-span highway bridges in Turkey including column deterioration

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2016

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Ocak, Canan Elif

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Considering the latest three major earthquakes occurred in Turkey, the performance of the bridges could be evaluated as successful. Bridges are one of the most important members of transportation network and it is important for them to survive during earthquakes. Contrary to the general belief, minimum damage during earthquakes mean very high safety factors included to the design rather than a success. Up to now, the bridges designed in Turkey are based on AASHTO (American Association of State Highway and Transportation Officials) and a modified version of LFD Bridge Design Specification. General Directorate of Highways (KGM) and Middle East Technical University (METU) conducted a project, (Türkiye Köprü Mühendisliğinde Tasarım ve Yapıma İlişkin Teknolojilerin Geliştirilmesi Kılavuzu ) based on Load and Resistance Factor Design (LRFD) to update current practice in Turkey. However this recently published specification has not been used widely in design practice. For this reason, in this study the bridges are designed based on AASHTO LFD. By selecting different number of spans, column heights and lengths of column long side, the models are generated. The bridge columns are designed with gross and effective sections. The effect of 50 years of deterioration is taken into consideration and the initial and final conditions of bridges are compared. Based on this study, it is concluded that, overdesigned bridges are obtained due to selection of gross section columns. In addition, a deterioration model and average strength loss due to deterioration are proposed.

Subject Keywords

Bridges, Bridges, Structural analysis (Engineering)., Concrete

URI

http://etd.lib.metu.edu.tr/upload/12620365/index.pdf
https://hdl.handle.net/11511/25910

Collections

Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

C. E. Ocak, “The Assessment of seismic performance of multi-span highway bridges in Turkey including column deterioration,” M.S. - Master of Science, Middle East Technical University, 2016.