混凝土板梁的有限条法简化分析

桥梁结构在各种荷载作用下产生的内力和弯矩影响着桥梁的性能．桥梁弯曲、扭转和挠度等过大时会导致结构的破坏，这在结构设计阶段就应加以分析．本文提出一种有限条简化分析方法。可以较好地分析桥梁的挠度、弯曲和扭转变形．通过对一座简支板梁桥模型的分析，与现行有限元方法的分析结果进行了比较．结果表明，本方法能够较好地处理边界条件，只需要很少的输入工作就可以得到正确的分析结果，从而为结构．Y-程师提供了一种用于分析板梁桥在交通荷栽作用下行为的有效工具．

Analysis of Concrete Slab-Girder by A Simplified Finite Strip Method

Bridge structures are subjected to several types of loads, which generate different forces and moments that influence the behaviour of the bridge. Some of these effects, such as bending, twisting and deflection, could have as consequence the collapse of the bridge and must be analyzed properly during the design process. This work proposes to the local structural engineers a tool for analyzing slabgirder bridges subjected to traffic loadings by using a simplified finite strip method and picturing graphical simulation of deflections, bending and twisting with less amount of input effort. The method, applied on a model of a simply-supported slab-girder bridge, is compared to the existing finite element analysis methods and shows similarities in the distribution patterns and magnitude of output but requires a fewer number of elements and tackles better their shortcomings on boundary conditions.