變斷面 I-型 曲線格子桁橋의 影響線에 관한 硏究 = A Study on Influence Line of Curved I-Girder Grid Bridge with Vriable Cross Section

국문 초록 (Abstract)

변단면 I-형 곡선격자교의 최대부재력을 해석하기 위해 본연구에서는 Vlasov의 기초미분방정식을 이용하고 이를 유한차분법을 이용하여 변단면의 휨모멘트, 전단력, 순수비틂모멘트, ��綢낯霽璇� 바이모멘트의 영향선을 구하여 제시하였고 이를 이용해 최대부재력이 생기는 점에서의 단위하중의 작용위치를 구하였다. 실제 교량해석에 있어 본논문의 결과를 이용하면 부재의 부재력을 쉽게 구할수 있을 것이다.

다국어 초록 (Multilingual Abstract)

The general behavior of curved girder considering the warping effects is formulated by series of differential equations postulated by Vlasov.
In order to deternine the maximum bending moment, the maximum shear force, the maximum pure torsion, the maximum warping torsion, and the maximum bimoment for the curved girder grid bridges, it is important ot find the location of live load applied to the curved girder grid bridges. The fundamental differential equation concerning the behaviour with warping effects for the curved girder is developed by Vlasov. Also, shear force, bending moment, pure torsion, warping torsion, and bimoment for curved I-girder bridge are analyzed by the finite difference method. In this paper, the influence line of shear force, bending moment, pure torsion, warping torsion, and bimoment due to unit vertical load and unit torsional moment for curved I-girder grid bridges with variable cross section are obtained by using the finite difference method and compared with respectively.