Shearing Force Distribution Of Web Plate Research Of Single Box And Multi-cell Steel-concrete Combined Section

With the rapid development of the transportation infrastructure of our country, the bridge construction is increasing a lot. Because of many advantages of the corrugated steel webs bridge, it has been used more and more to practice. As one of the branches, extra-dosed bridge of corrugated steel webs,which combine the both advantages of corrugated steel web girder bridge and extra-dosed bridge, is also developing rapidly, its section is single box and multi-cell.To this kind of bridge, the stress state of the web is very complicated. There is no suitable theoretic method to the question. Therefore the web cracks occur frequently. However, when we use the steel web to replace to concrete web, the problem can be released on a certain extent. But to the girder with a single box and multi-cell section, there may have a kind of new section with both concrete web and steel web, it has some advantages. The research of shearing force distribution of steel webs and concrete webs is one of a main point to such bridge types. There is some relevant research in this paper. To combine the methods of theoretical analysis and numerical simulation to calculate the shearing force distribution of each web. The theoretical analysis is mainly about thin-walled bar theory of structural mechanics, to analyze the force state under pure bending. The numerical simulation is to make the global and local finite element model, to analyze the force state of webs under full and partial load of the bridge.Finally the two results are compared. We can find that the distribution of shearing force of different webs on the different places of bridge is different. On the base, we may offer some suggestions to the practical design.