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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Kappos, A. (2015). Seismic Analysis of Concrete Bridges: Numerical Modeling. In: Beer, M., Kougioumtzoglou, I.A., Patelli, E., Au, SK. (eds) Encyclopedia of Earthquake Engineering. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-35344-4_127
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