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http://dx.doi.org/10.5000/EESK.2005.9.2.047

Seismic Response Analysis of a Floating Bridge with Discrete Pontoons  

Kwon, Jang-Sup (특허청 건설기술심사담당관실)
Publication Information
Journal of the Earthquake Engineering Society of Korea / v.9, no.2, 2005 , pp. 47-58 More about this Journal
Abstract
Dynamic response analysis in time dimain is conducted for floating bridges with discrete pontoons subject to spatial variation of ground motions. The Spatial variation of ground motions is considered with the coherency function model which represents wave passage, incoherence and local site effects. The superstructure of the bridge is represented by space frame and elastic catenary cable elements, the abutment us modelde with the spring element of FHWA guideline for considering soil structure interaction and the concept of retardation function is utilized to consider the frequency dependency of the hydrodynamic coefficients which are obtainde by boundary element method. multiple support excitations considering the spatial variation. The noticeable amplification of the response can be shown when the spatial variation of ground motions is incorporated in the anallysis of floating bridges.
Keywords
floating bridge; spatial variation of ground motion; wave passage effect; incoherence effect; local site effect;
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