| Concrete filled steel tubular arch bridge is a bridge over the past twenty years has developed very quickly, with the advantages of large span ability, high bearing capacity, good fire resistance, low cost, convenient construction etc. However, in actual use, the concrete-filled steel tube arch bridge has caused some problems, which is caused by one of the separation problem. At present, the theory research is studying the effect of separation on the ultimate bearing capacity of concrete filled steel tube arch bridge, the experimental research is less.Therefore, in view of the influence of stress on performance of separation concrete filled steel tube arch bridge is very necessary. The main work in this paper as fellow:(1)In this paper, with a natural place for six years, has produced naturally road the concrete filled steel tube sheet circular tube arch rib as experimental object, L/4 loading damage experiment was carried out, get relevant displacement stress and strain data. Loaded after the experiment the dismantling of the model, to study its real separation. Present a asymmetric deformation experiment found that the steel tube arch, and a certain degree of transverse deformation, but the horizontal deformation is small, the deformation is given priority to with in-plane deformation.(2)Using the large general finite element software ANSYS modeling analysis was carried out on the experimental model of concrete-filled steel tube arch rib, respectively established with separation defect model of arch rib and without separation defect finite element model of concrete filled steel tube arch rib of separation effect of the ultimate bearing capacity of concrete-filled steel tube arch rib in the analyzed and studied. |
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