Software for the preliminary design of seismically isolated R/C highway overpass bridges

G. C. Manos*, A. G. Sextos, S. Mitoulis, M. Geraki

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

Abstract

The features of an expert system, developed for the pre-design of highway overpass R/C bridges, are presented and discussed. This system is implemented into a software and is aimed to facilitate the seismic upgrading of an overpass by isolating its deck with the inclusion of elastomeric bearings. The preliminary design of such an upgrade scheme is the target of this software based on the current design provisions of Eurocode 8 (Part 2) as well as on engineering decisions included in the expert system; it can also be extended easily to comply with alternative design provisions. The developed software is connected with a database of typically used steel laminated rubber bearings and relevant laboratory test results and it performs a series of checks according to Eurocode 8, in order to ensure the satisfactory seismic performance of the selected upgrade scheme. The parameters that are addressed within this software as independent variables are: the geometry of the overpass, the number of bearings at each deck support, the level of seismic action and the characteristics of the bearings (i.e. their geometry and shear modulus). The final selection of the bearing scheme (in terms of number of bearings and bearing dimensions at each support) is based on a costbenefit criterion aiming at optimizing structural performance at minimum cost. The methodology proposed for the preliminary design of seismically isolated overpasses and the software developed were validated through more rigorous dynamic analyses employing multi-degree of freedom numerical simulations of realistic bridge overpasses.

Original languageEnglish
Title of host publication9th US National and 10th Canadian Conference on Earthquake Engineering 2010, Including Papers from the 4th International Tsunami Symposium
Pages1756-1765
Number of pages10
Volume3
Publication statusPublished - 2010
Event9th US National and 10th Canadian Conference on Earthquake Engineering 2010, Including Papers from the 4th International Tsunami Symposium - Toronto, ON, United Kingdom
Duration: 25 Jul 201029 Jul 2010

Conference

Conference9th US National and 10th Canadian Conference on Earthquake Engineering 2010, Including Papers from the 4th International Tsunami Symposium
CountryUnited Kingdom
CityToronto, ON
Period25/07/1029/07/10

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