Spectrum Response and Codes Evolution Case Study - Post-Compressed Girder Bridge

Abstract eng:
The object of this study is a bridge structure with sectioned, prefabricated, postcompressed, reinforced concrete girders, to be used as a foot-walk. The bridge has two 32.25 m spans. The utilised 33.0 m girders are the longest in the Romanian Prefab Girders Catalogue. Later on, the bridge function was extended, it being used for the road vehicles traffic as well. The bridge, still in use, was checked two times, according to different technical codes. The article is built up on three plans, namely: (i) a brief presentation of Vrancea seismic epicentre, Romania, (ii) a brief presentation of the evolution of the Romanian technical codes for designing the building - and bridge type structures under the seismic action, (iii) application of these codes on this existing bridge type structure and comparing its spectrum response under the seismic action, modelled according to various codes. The analysis of the bridge was carried out taking into consideration the hypothesis of two ductility classes: limited ductility and ductile. .

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