Deck Arch Bridge Vibration Characteristics Of Stability And Vibration Analysis

In China’s road construction and railway construction, the bridge is a common form of the bridge structure. Compared with other forms of arch bridge, it has the form of not only different in structure, but also in the mechanical behavior of the structure itself are essentially different in nature. For now the bridge engineering research within the field, more and more highlight the stability of the bridge itself. Deck arch bridge tend to set of in arch, columns, deck one such structure set as one full arch maximum carrying capacity, the ability to gradually improve the stability, the study on the stability of arch bridge for practical project has a very important significance.In this paper, in order to support construction of a railway bridge on the background of basket-style on-line Beipan, Applicatting Midas / Civil finite element software, the establishment of different types of load cases, considered the stability of the bridge analysis, vibration characteristics, summed up the law, and to the future the design and construction provide some advice for reference. The specific work the following main areas:(1)Through the construction phase, the highest arch rigid frame column was linear and geometric nonlinear analysis, geometric nonlinearity stability, critical load value obtained is less than the linear stability critical load value, indicating geometric nonlinearity of the bridge It is to play a crucial role.(2)Through to the final stage, the whole bridge under different load cases action, considered buckling analysis, geometric non-linear characteristics of stable value to be lower than the characteristic values of linear stability analysis of different buckling modes diagram comparing different conditions, bridges tilt law.(3)According to a lot of instability engineering event analysis, draw some respect in terms of design, construction and construction specifications, made some of their own views. From different design parameters, construction technology and technical aspects of the measures put forward some ideas to optimize stability.(4)Analysis of vibration characteristics of the bridge, resulting in variation of comparative analysis of the overall value of the bridge frequency of vibration effects by a different factors.