Experimental Study And Mechanics Analysis Of Corrugated Steel Bridge And Culvert Structure

A new kind of structure, CSBCS (Corrugated Steel Bridge and Culvert Structure) is made of Corrugated Steel that is a new tape of building material. And it is necessary for CSBCS to have a great vitality and high possibility of wide application in future due to the properties of fast construction, elegant form and low price and otherwise. At present, however, there are no code for design and construction of CSBCS, and there are many problems remain to be studied about the application thereof, such as the interaction between CSBCS and soil, overall stability of CSBCS, and effect of the thickness of CS (Corrugated Steel) on CSBCS, and the application of CS to middle or large bridge, and so on. Based on an actual project, Feng-shou-qu Project in Honghu city, Hubei province, which is one of the biggest CSBCS all over the country with a radius of 3. 3m and an oblique span of 9.334m, and bevels 45° with the axes of road, experimental study and mechanics analysis of CSBCS are finished in this paper so as to resolve the first two problems above.Contrast to other bridge and culvert, the advantages and disadvantages of CSBCS are systematically analyzed, what more, the further research on the application of CSPI (Corrugated Steel Pipe) to both at home and abroad, construction technique thereof are made time.Based on the model of for the first time, the coupled model of CSBCS and soil considering the interaction between them was established in this paper, in which CSBCS was simplified into the arch structure with fixed support and problem of plane strain. According to the method ofE.B.Seydel, the geometry orthotropic plate was transferred intomaterial one, and also the equivalent material coefficients of CSPL (Corrugated Steel Plate) were calculated. On the basis of test under loading statically about static strain, opposite deformation to sedimentation of foundation on the actual project, further mechanics analysis of CSBCS was done. On one hand, the internal forces and displacement formulas of CSBCS were deduced by using the Matlab program, on the other hand, taking out of one wavelength of CSBCS and soil from the actual project as the analysis object, simulation numeric calculation was carried out by using big-style FEM (finite element member) software, ANSYS. The results of two methods checked well with the actual test information, which shows not only that CSBCS, which is a kind of flexible underground structure, has the favorable behaviors under loading, but also that the coupled model is right and suitable, so that theoretic basis of the design and project application about CSBCS are presented.Based on the interaction between CSBCS and soil, the overall stability of CSBCS was analyzed by using ANSYS. The failure models of stability were proposed and the steady carrying capacity of structure was calculated. The result indicates that CSBCS has the property of high stability, which can be used as the reference to some degree for the more wide application of CSBCS at home.Some problems about CSBCS worth to be studied afterward are put up in the end of this paper.