超大跨双线铁路简支梁桥设计与结构受力分析

STRUCTURE DESIGN AND ANALYSIS OF SUPER LONG-SPAN AND DOUBLE-LINE RAILWAY SIMPLE SUPPORTED BEAM BRIDGE

介绍了目前国内最大跨度、最大梁段重量的双线铁路双箱单室截面简支梁桥的设计及基本施工步骤,并采用实体模型方法及梁格法对该桥在5道横隔梁和7道横隔梁下各荷载工况下的受力、变形特性及动力特性做了详细分析。分析结果表明:本桥型在设计荷载作用下受力性能完好,且5道横隔梁方案比选优于7道横隔梁方案。本桥型的设计将为我国建设高标准铁路桥梁具有一定的借鉴和参考价值。

Presenting the design and the basic construction step of the longest span and the maximum beam weight double - line railway simple supported beam bridge with twin - box single cross section. Particular calculate the deformation and the internal force character and dynamic behavior under various load cases by using the solid model method and grillage method with five cross diaphragm and seven cross diaphragm. The results of analysis indicate that the deformation and internal force performance of the bridge is perfect under the effect of the design load, and the five cross diaphragm bridge type are better than the seven cross diaphragm bridge type. The design of this bridge type will have some certain significance as a reference for the construct of the high standard railway bridge in our country.