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A Study on Torsional Stress ratio and Torsional ratio of Curved Girder Bridge by Transfer Matrix Method  

Lee, Wong-Hong (진주산업대학교 토목공학과)
Lee, Yoon-Young (진주산업대학교 토목공학과)
Publication Information
Journal of the Korea institute for structural maintenance and inspection / v.10, no.1, 2006 , pp. 173-182 More about this Journal
Abstract
In the design of curved girder bridges, the engineer is faced with a complex stress situatiorl. since these types of mutiple-I girder. mono-box girder and twin-box girder are subjected to both bending and torsional force. In general, the torsional forces consist of two part, St. venant's and warping. Thus the procedure for determining the induced stresses in a curved girder is difficult. The transfer matrix method is extensively used for the structural analysis because its merit in the theoretical background and applicability. The technique is attractive for implementation on a numerical solution by means of a computer program coded in Fortran language with a few elements. To demonstrate this fact. it gives good results which compare well with finite difference method. Therefore, in this paper, to clarify the range where the torsional warping stress can be approximated by pure torsional analyzed a critical value of relationships between the torsional stress ratio and torsional ratio.
Keywords
Curved gilder bridge; Transfer matrix method; Torsional stress ratio; Torsional ratio;
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