Research Of Transverse Load Distribution For Small And Medium Span Skew Girder Bridge

In recent years, with the rapid development of highway network and gradually improve the urban bridge, bridge construction technology, and theoretical studies obtained widely improve. In bridge design and construction process, change past line to obey the thinking of the design of the bridge, starting from the safety of high speed, comfortable and beautiful three aspects to determine the line alignment. Therefore, in high grade highway and urban overpass construction, more and more oblique and curved structure of bridge increasing proportion, especially in highway skew bridge has a large number of, according to rough statistics, in the high grade highway about 30%- 40% of the bridge for the skew bridge.This paper mainly according to the mechanical characteristics of the multi beam skew girder bridge, with finite element analysis software Midas /Civil 2012 of simply supported T-beam bridge load transverse distribution coefficient is analyzed by numerical calculation,by changing the design parameters of the structure, analysis the influence of load transverse distribution. On the basis of, and to explore the simply supported continuous skew girder bridge load transverse distribution and continuous wide skew bridge transverse load distribution. The main work is as follows:(1)Through access to relevant literature, the development of skew girder bridge, the characteristic and the present research situation were reviewed in this paper. Combined with bridge load transverse distribution theory, to the calculation of the skew girder bridge load transverse distribution coefficient method and its application are summarized.(2)With five beam simply supported T-beam bridge as an example, by Midas / civil established numerical model of finite element beam grillage method analysis, under the most unfavorable load for the lateral distribution coefficient of the girder, and the traditional G-M correction method, rigid crossbeam method and generalized grillage analogy method to calculate the load transverse distribution coefficient results. In order to explore the correctness of skew girder bridge load transverse distribution coefficient calculation method is reasonable and to verify the numerical model. On this basis, combining with generalized beam grillage method and G- M correction method for the lateral distribution of the wide skew bridge analysis and exploration.(3)Numerical model of grillage method based and related factors on the impact of load transverse distribution of parametric analysis. From the skew angle, stiffness of supporting bearing, number of longitudinal beam, beam number angle of their effect on the load transverse distribution coefficient, and summarize the summary of relevant laws of change.(4)On the basis of simply supported skew bridge transverse load distribution further for simply supported turn of the lateral load distribution condition of continuous skew bridges were analyzed and of continuous skew bridge width of transverse load distribution is discussed in this paper.The regularity of the transverse load distribution for continuous skew T girder bridge was understood further.