| Tied concrete-filled steel tubular arch bridges, as an original structural system, the tied concrete-filled steel tubular arch bridge has special mechanical behavior and biggish span, which occupies a competitive position in field of modern bridges. As its span increases, when the arch ribs are conveyed is also increscent, the difficulty of conveying increases. And the load reaction of structure is more complex; the stabilization is very important to the structure during construction loading. So it is very important to the structure about construction calculations.On the basis of model of MAOCAOJIE Bridge of NANXIAN Country in HUNAN Province; analysis is done when the arch ribs are installed. Five portions are done in this paper.1.The structure characteristic, tenor, the research's actuality about tied concrete-filled steel tubular arch bridges. And the mechanical design of the model is minutely introduced.2. On the basis of analysis about cable force, the theory about logical arch bobbin, a new method is introduced. The method is done by controlling section's movement.3. The variety disciplinarian of the reference point displacement, cable force, the reference section's internal force and stress is showing up with the plane calculate-former and the space calculate-former in this paper. It is compared by the numeric results and the practical results. And the new method is validated4. In accordance with the model bridge's construction loading, it is simulated by the space finite-element-method software. The distortion rule of the arches, the horizontal thrust force and the strain of the tie bars, the variety disciplinarian of the pilot section's stress and strain are minutely analyzed. And the structure's elastic steady is analysed in this paper.5.The nonlinear idiosyncrasy of the structure during conveying the arch rib by the element's living-death character. It is concluding that she nonlinear effect is minute. And it is slighting. |
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