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• W1486386495 abstract "In the Ph.D. thesis, the seismic vulnerability and seismic collapse risk of reinforced concrete bridges, with piers with structural details, that are nowadays considered inadequate for seismic prone regions, and were typically used in Slovenia and Europe, were studied. A world wide literature survey concerning response of reinforced concrete bridges in recent earthquakes, typical structural deficiencies in such bridges, experimental studies on hollow box piers, analytical models and methods for seismic performance assessment, and methods for retrofit of such bridges was performed. Among most common structural deficiency found in considered bridge piers is insufficient quantity of transverse reinforcement, which correspondingly means (too) low shear loading capacity, (too) weak concrete core confinement and possibility of longitudinal reinforcement buckling. Analytical studies were supported by experimental studies, which were performed in collaboration with the Slovenian National Building and Civil engineering Institute. In experimental studies, the response of scaled models of the actual prototype piers with hollow box section and of typical cross sections shaped sections, was considered. In the case of as built hollow box specimens their inadequate shear strength was recognized as main deficiency. Therefore the methods for shear strengthening using concrete and FRP jacketing were considered and experimentally tested. In the case of typical I shaped pier its inadequate ductility had been recognised as main deficiency, therefore effort had been made to improve it using FRP jackets. Nowadays the use of FRP jacketing in order to improve the response of bridge piers, is gaining considerable attention in the world, but due to various concerns, it is not yet widely represented in Slovenian practice. Therefore both advantages and disadvantages of using FRP for the purposes of seismic strengthening of RC bridge piers were identified. In the case of as-built hollow box section columns the experimental studies have shown that, despite inadequate structural details, which appear in these columns, quite ductile behaviour can be expected columns (ductility up to 4). The reason for this was favourable box shape, which provides a large compression zone and low compression stress levels. In the case of the I section piers this cannot be said, as the ductility of as built specimen was only about 2. As the current European structural standards in the field of seismic assessment and seismic retrofit are primarily intended for the assessment of buildings, the usefulness of the methods proposed by them were applied to existing bridge structures.The seismic risk of considered structures was determined using the generally accepted PEER methodology taking both the aleatory and epistemic uncertainties into account. It turned out that the bridges with inadequate structural details may be exposed to much greater risk than comparable bridges with the appropriate de" @default.
• W1486386495 created "2016-06-24" @default.
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• W1486386495 date "2012-03-14" @default.
• W1486386495 modified "2023-09-24" @default.
• W1486386495 title "Seismic response of concrete bridges with deficient structural details" @default.
• W1486386495 hasPublicationYear "2012" @default.
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