The Preliminary Exploration To The Shearing Force Assignment Rule Of Multichambered Thin-walled Box Girder Web Plate

With the progress in the bridge design and construction technology, thin-walled box girders are used more and more in modern bridges because of their merits such as good appearance in shape, largely structural stiffness and good use in different case. The structure of thin-walled box girders are commonly applied in some large span continuous beam bridges and rigid frame bridges in our country. But the stress of the thin-walled box girder is a very complicated problem, homologous calculation theories and method are still not perfect. The bridge design corporation also doesn't get to solve thoroughly to this kind of individual technique crux of structure. So it is necessary to do some further researches in thin-walled box girder, especially in multichambered thin wall box girder.Multichambered Thin-walled box girder is a hyperstatic structure, it is a difficulty to solve its hyperstatic unknown shearing flow. This article based on the thin-walled bar theory, with the references to force mothed thought, is to transform closed box girder to the opened box girder and a group of unknown force, and to use the conditions of displacement coordination, analyses the shearing force distribution of the middle and side web plate while straight-web plate multichambered Thin-walled box girder in bending conditions, explores itself inner rule and computing method. It will be useful for box girder structure design, lateral bending resistance computing and diaphragm design and the choice of supporting stand size.Through the preliminary exploration and calculation of multichambered Thin-walled box girder web plate shearing force, some main conclusions are acquired:1. The multichambered Thin-walled box girder hyperstatic unknown shearing flow calculated matrix equation is set up.2. The multichambered Thin-walled box girder unknown shearing flow calculated matrix equation is solved.3. The total shearing force formula of multichambered Thin-walled box girder web plate is made.4. To make use of above-mentioned matrix equation and formula to calculate...