Structural Strength Analysis Of Special-shaped Arch Bridge Decoration

In recent years, the utility function of bridge gradually cannot meet the increasingspiritual and cultural pursuit. Study of bridge aesthetics has gradually become an importantpart of the bridge. The landscape design of bridges becomes an indispensable part of thebridge aesthetics. At present, in our country, there is no corresponding bridge landscapedesign standard. In this paper, the main work is to analyze the bridge decoration structure toprovide supporting data for the bridge structure design.This paper mainly includes the following several aspects of the work. First, the finiteelement model of the Landscape Bridge was established in the Finite element software. Thespan of the decorative structure for bridge is100m. Height is21m. Arch rib along thelongitudinal direction of the bridge is symmetry structure. The arch ribs are connected bythree K cross-braces. And the arch ribs are connected to the bridge deck by booms. Second,according to the geographical conditions of the bridge decoration structure, the main factorsof the bridge decoration structure were determined. And the strain and displacement of thestructure was analyzed under the temperature and wind loading. Third, the dynamic responseof the structure was analyzed. The vibration characteristics of the structure were analyzed.And then, the response spectrum analysis method is used to solve the dynamic response of thedecoration structure under transverse, longitudinal and vertical seismic loading.For static analysis, response of the structure was solved under the weight, wind loadingand temperature loading. The maximum displacement was appeared near the vault and themaximum stress was appeared in the arch rib, and larger stress concentration was appeared atthe connections of the vault and cross-braces. And the axial strain and bending moment of thearch corner are relatively high.For seismic analysis, the natural vibration characteristics of the structure were analyzed.The frequency and the overall stiffness of the structure are high. The first vibration modeshows horizontal roll, so the lateral stiffness is relatively low. The transverse deformation of the structure, especially in the1/4arch ribs, is bigger thanthe longitudinal deformation and the vertical deformation. For the vertical seismic vibration,the deformation of the cross-bracing on both sides appears large vertical deformation.Through the calculation and analysis listed above, the transverse displacement of ribs andcross-bracing on both sides appear larger deformation. The deformation of cross-bracing islarger than that of the arch rib, and the cross-bracing was vulnerable to the loading, and waseasy to be damaged.