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http://dx.doi.org/10.7734/COSEIK.2015.28.2.161

Evaluation of Characteristics on Negative Reactions of Simply Supported Curved Box Girder Bridges with Elastomeric Bearings  

Kim, Kyungsik (Department of Civil Engineering, Cheongju Univ.)
Lee, Heejeong (Department of Civil Engineering, Cheongju Univ.)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.28, no.2, 2015 , pp. 161-168 More about this Journal
Abstract
Horizontally curved bridges are subjected to torsional loads by their vertical dead loads only as well as eccentric loads, which cause negative reactions at supports. In this paper, effects of bridge curvature on vertical reactions at supports are investigated for 48.8 m length simple span steel box girder bridges with elastomeric bearings by varying curvature angle from 0.49 to 1.35 rad. In order to expect magnitude and direction of reactions including possibility of negative reactions, reaction evaluation equations have been analytically developed by separating a superstructure of curved bridge into independent components. Concrete slabs and bottom flanges in steel box section are assumed geometrical annular sectors in area dimension, and top flanges and webs that have very narrow projected areas are assumed geometrical arcs in line dimension. Proposed equations have relatively simple forms and prediction values are on very good agreement with those from finite element analyses by difference of 1% order.
Keywords
curved bridge; torsional load; simple span; negative reaction; reaction equation; annular sector;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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