【作者】 陶舍辉；

【导师】 项贻强；

【作者基本信息】 浙江大学 ， 桥梁与隧道工程， 2005， 硕士

【摘要】 本文针对目前国内的荷载横向分布计算方法都是只适用于单跨简支桥，而近年来广泛采用的预应力混凝土先简支后连续的多梁式斜箱梁桥还没有一种成熟理论的研究现状，在现有的简支单斜梁、连续单斜梁分析理论及方法，以及针对多梁式简支斜桥的荷载横向分布计算方法的基础上，研究提出多梁式连续斜箱桥的荷载横向分布计算方法，探讨了此种桥型的受力特性，并以一座典型的多梁式连续斜箱梁桥为工程实例，进行试验研究，同时用空间有限元进行对比分析。结果表明，所提出的弹性支承连续梁法计算值，与空间有限元分析理论值及荷载试验测试值吻合得较好。弹性支承连续梁法由于在计算中考虑了横梁变形的影响，因此它对宽桥和窄桥都适用，而且计算过程并不复杂，有着广泛的工程应用前景。与此同时，应用该方法对荷载横向分布沿桥跨方向的变化进行了研究，以指导工程设计。最后，对多梁式连续斜箱梁桥的动力特性进行了空间有限元分析和试验研究。更多还原

【Abstract】 At present, the existing method for calculating coefficients of transverse distribution of load is only appropriate for single span bridges, and cannot calculate multi-girder bridges. So this paper offers a new method, named elastically supported continuous beam method, for calculating transverse distribution of load of continuous skew box multi-girders bridges, based on the theory of single span skew bridges and continuous skew bridges, and the method for calculating transverse distribution of load of single span multi-girders bridges, which is existing now. Then apply this method to calculating a typical continuous skew box multi-girders bridge, and the comparative analytical calculation was done with the method of this paper, the finite element method and the experimental research. The result indicated that the theoretical calculating result of elastically supported continuous beam method is accordant with the result of experimental test and the finite element method. As a result of taking into account the curve distortion of crossbeam, elastically supported continuous beam method is not only appropriate for narrow bridges, but also wide bridges. It has advantages of compact calculative process, so have far-ranging engineering application foreground. At the same time, this paper takes some search on the change of transverse distribution of load along the longitudinal direction by this new method. At last, the dynamical behavior is gained by experimental study and finite element method.更多还原