Encyclopedia of Earthquake Engineering

2015 Edition
| Editors: Michael Beer, Ioannis A. Kougioumtzoglou, Edoardo Patelli, Siu-Kui Au

Seismic Analysis of Concrete Bridges: Numerical Modeling

  • Andreas KapposEmail author
Reference work entry
DOI: https://doi.org/10.1007/978-3-642-35344-4_127

Synonyms

Concrete bridges; Modal analysis; Nonlinear analysis; Seismic loading

Introduction

Bridges are deceptively simple systems, since they are typically single-storey structures wherein the horizontal members (the deck) can often be modeled either as a continuous beam or as a series of simply supported beams. In fact, the continuous beam might be a valid approximation in seismic analysis of bridges if a “spine” model is adopted; in such a model the bridge deck is simulated using 3D beam elements with 6 degrees of freedom (DOFs) at each node, located at the centroid of the cross section. It is worth noting that in gravity load analysis the geometric complexity of the deck is usually represented in the computer model to greater detail, as compared to that used for estimating the seismic response. On the other hand, bridges present peculiarities that are not commonly encountered (or are far less important) in buildings, such as the modeling of bearings, shear keys, and expansion...

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  1. 1.Department of Civil EngineeringCity University LondonLondonUK