Static And Dynamic Research On Self-anchored Suspension Bridge With Steel-Concrete Mixed Girder Under Different Parameters

In recent years, the self-anchored suspension bridge are more and more popular, with its features such as the elegant line, the novel appearance, flexible selection address. This kind of Bridge is a good choice in small and medium-span bridges in cities. A self-anchored suspension bridge with mixed girder for the engineering background, the system research on static performance and dynamic performance was done in this paper at the basis of the relevant literature both at home and abroad. To ensure that the self-anchored suspension bridge construction and operation is safe. So that the design of self-anchored suspension bridge can be more economical and rational, the main research contents are as follows:(1) Establishing model using ANSYS finite element, process of construction was analyzed and calculated while hoist of steel box girders, the linetype of the main cable and the steel box were analyzed and controlled, and the measured value and theoretical value, compared to guide the construction process and provide quality assurance.(2) In the previous study, static performance of self-anchored suspension bridge with mixed girder was studied, drawing a comparison between a self-anchored suspension bridge with mixed girder and the earth-anchored suspension bridge. we analyzed the rise-span ratio, ratio of side span to center span, stiffness of the stiffening girder, whether there exists the supporting piers, camber of the main beam which effected the internal force, produced by the live load.(3) Based on finite element theory, the establishment of the self-anchored suspension bridge with mixed girder model of three-dimensional dynamic calculation, taking into piles - earth effect given mixed steel self-anchored suspension bridge in the top 20 bands of frequency and mode shape corresponding to earth-anchored suspension bridge and to the relevant frequency and vibration mode for comparison. We research on structural parameters which effect the dynamic performance, such as the main beam of material, whether having supporting piers, the rise-span ratio, ratio of side span to center span, stiffness of the stiffening girder, camber of the main beam, and relevant conclusions drawn.