Analysis Of Statical And Dynamical Behavior And Experimental Research On Continuous Skew Box Multi-girders Bridges

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.