预应力异型曲线箱梁桥的设计与计算方法研究

对城市高架桥和立交桥中经常出现的预应力异型曲线箱梁桥的设计和计算进行了分析和研究,结合实际工程,指出了该类桥梁在设计时应着重注意的问题和采取的构造措施,提出了适合该类桥梁设计计算的方法,提出了符合梁格截面划分原则的计算公式,并结合实际利用FORTRAN语言编制了梁格截面的自动划分和截面特性计算程序,利用该程序可以直接生成符合相关计算软件命令格式的截面参数文件,省去了梁格试分和大量截面特性计算的繁琐过程,使得变宽截面的梁格法计算不再费时费力,实践证明利用该设计计算方法可以效率较高的获得满足工程精度要求的计算结果,对于此类桥梁的计算和设计具有一定的指导意义和工程实用价值。

Design and Computation Method of Prestressed Irregular Curved Box Girder Bridge

The design and computation of prestressed irregular curved box girder bridges which are commonly used on city overpasses and interchanges were analyzed.Based on the practical engineering projects,the issues and the construction measures that should be paid more attention during designing this kind of bridges were pointed out.The computation method for designing the bridges was given,and the calculation formulas accords with principles of grillage cross-section division were pointed out.The grillage cross-section division and cross-section characteristics calculation program were worked out with FORTRAN language according to the actual situations.By using the program,the file of section parameter that is in accordance with related calculation software command format can be directly gotten.Therefore,grillage cross-section trial division and lots of parameter calculations were omitted,and calculation of broaden beam by grillage method was effectively simplified.The engineering practice has proved that this method can obtain the computing results which meet the projects accuracy requirements with high efficiency.In general,the method provides valuable references for the computation and design of similar bridges.