複合非線形性を有する薄肉曲線I型はりの一解析法

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Box girders are generally used as main girders of horizontally curved bridges, because the torsional rigidity of box girder is larger than that of I-girder. But, when main girders of curved bridgs take large radiuses of curvature and so their torsional moments are small, I-girders are often used to construct curved bridges. Moreover, the curved I-girder bridges having comparatively short span have been constructed in the highway of large cities, because the I-girder bridges can easily be designed and economically fabulicated. This paper presents a method of analysis for geometrical and material nonlinearities of thin-walled curved beams with open cross section. The fundamental equilibrium equations are obtained from the principle of incremental virtual work. Based on the discrete general solution of fundamental differential equation, the geometrical and material nonlinearities are analyzed hy incremental load procedure (step by step method). As the result of numerical analysis, the propriety of the present method was verified.
長崎大学工学部,Faculty of Engineering, Nagasaki Universityの論文