多梁式平面弯梁桥的横梁分析法

将宽跨比较大的多梁式平面弯梁桥桥跨结构看作是主梁与横梁互为弹性支承的结构，考虑弯扭耦合作用的特点，应用结构力学的位移法，求出结点的挠度与扭角，进而找出结点力．由于摒弃横梁刚度无限大的假定，充分考虑横梁受力后的实际挠曲变形，因此能同时比较精确计算主梁荷载横向分布与弯梁桥的横梁内力．

Crossbeam Analysis Method of Multibeam Plane Curved Beam Bridge

In this paper, the supersturcter of a multibeam curved beam bridge is regarded as grillage beam elastically supported with cross beam and girders one another. The coupling effects of bending and twisting action are concerned. The deflexion and angle of rotation of nodal points can be obtained on the ground of displacement of structural mechanics, and the forces of nodal points are further obtained. Because the assumption that rigidity of cross beam is infinite be abandoned, and the flexure deformation of cross beam is considered fully while applied of forces, as the crossbeam is calculated much accurately, so the lateral load distribution can be also obtained much accurately.