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Inelastic Seismic Analysis of Reinforced Concrete Viaducts

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Using modern seismic codes designers face the problem, which model and which procedure to choose in the case of the inelastic analysis of bridge structures? In this paper, general recommendations are formulated. A case study of a typical Slovene viaduct is presented. Regarding the choice between different models, a simple-lumped plasticity beam element is recommended for practical applications. The inelastic time-history analysis is found to be the best procedure for the analysis of bridges. A simplified inelastic pushover procedure is nowadays a popular alternative. However, it should be used with care, particularly in the case of irregular bridges. In general, no equivalent single mode static procedure (elastic or inelastic) can be used for torsionally flexible viaducts or viaducts with individual short and stiff columns. Additionally, an "irregularity index" has been proposed as a global numerical measure to help designers decide about the suitability of the pushover analysis for bridges. This index is based on the relative difference of the results of two iterations of the simplified methods.
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Document Type: Regular Paper

Publication date: 01 May 2003

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    Structural Engineering International (SEI), the quarterly Journal of IABSE, published since 1991, is the leading international journal of structural engineering dealing with all types of structures and materials. SEI offers its readers a unique blend of short profiles on recent structures, and longer, in-depth technical articles on research, development, design, construction and maintenance. Articles are written by practicing engineers and academia from around the world and reflect the high standards of IABSE. IABSE Peer Review stamps are given to papers that have passed through a highly selective review process and demonstrate a significant contribution to the state of structural engineering knowledge.To recognise contributions of the highest quality, an Outstanding Paper Award is presented each year.

    SEI is printed in Switzerland; ISSN 1016-8664; E-ISSN 1683-0350
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