【摘要】 根据薄壁箱梁的翘曲扭转理论,建立了可以考虑截面翘曲和偏心影响的3维空间曲线箱梁桥的位移模式和能量泛函,利用有限元列式建立了动力方程。并编制了相应的程序。最后通过算例说明了翘曲扭转对曲线箱梁桥影响较大,不可忽略。更多还原

【Abstract】 The seismic analysis of a curved box-girder bridge is carried out in the paper. It is based on the theory of warping and torsion of the thin-walled beam. The 3-D displacement model and the energy functional are derived. It is considered that the noncoincidence of the shear center and centroid. A finite element formulation of the curved box-girder is established. At same time, a relative program is developed. a numerical example is given. It is found that the effect of warping and torsion on the curved box-girder bridge can not be negleted.更多还原