Optimization Of Huo Lin Guo Le Self-anchored Suspension Bridge Project

Self-anchored suspension bridge, having a beautiful appearance, higher using ratio of material and some other outstanding advantages, is being more used. Concrete box girder or edge girder are often adopted in self-anchored suspension bridge to replace steel girder. A spatial finite method analysis model was built for a self-anchored suspension bridge with a span of about 130 m-The Huolinguole number 4 Bridge Neimenggu Province. With the aids of a FEA programs, the influence of main girder style and rise-span ratio to the self-anchored suspension bridge are studied. Major public are as follows:(1) Has consulted the domestic and foreign related data and summarized to it, this article elaborates detailed the development survey of Suspension Bridge, especially Self-anchored Suspension Bridge. This article also elaborates the structure function and the good and bad points of Self-anchored Suspension Bridge.(2) The first step of project optimization mainly aims on the girder structural style. Based on the finite element theory and considered the influences of many kinds of nonlinear factors, using large-scale general finite element software ANSYS, this article establishes concrete box girder, steel box girder and composite girder three different girder material of finite element model, then calculates girder's stress and has given the stress envelope chart. Carried on the comparison with the results, the concrete box girder's stress has been worst. This also explains the concrete box girder's limitation in great span bridge design. Finally has compared the three plans' efficiencies, obtained the conclusion that box girder is the most superior main girder structural style .(3) The main cable rise-span ratio is a very important parameter in suspension bridge. Based on using box girder, this article has further carried on the optimization to this parameter. This article respectively establishes finite element model of different main cable rise-span ratio, then analyses the results. Finally has compared the economy efficiency, artistry and so on, this bridge's main span arrow steps compared to is 1/5.5. Span for the main span 130m,the high vector is 23.5m.