The Mechanical Properties Of The Stable Two-lane Suspension Bridge

This research is based on the existing results of research on the suspension bridge,especially on the stable type suspended bridge. Two-lane stable type suspension bridge finite element model was established,and the bridge was studied about the response of static load and dynamic load.The bridge was to explore the mechanical characteristics,and this article provides the reference for this bridge design.The main content is as follows:1.The development course of Chineseand foreign suspension bridges was overviewed,at the same time,the progress of the calculation theory of the suspension bridge was also overviewed.The difference and the relation were introduced in this thesis-about the stable type suspension bridge and the common suspension bridge.2.It was explained that the non-linear finite element theory,and that the algorithms and calculation formula used.3.The elements be used for establishing the two-lane stable type suspension bridge finite element model were chosen according to the structure and geometry non-linear characteristics of the stable type stable suspension bridge.Initial strain of suspensions was repeatedly debugging for an optimum value.4.Had considered the structure geometry non-linearity,it was analyzed that the different states of two-lane stable type suspension bridge by Static Analysis.Has analyzed the bridge statics characteristic and the lateral stability,and with the ordinary hanging bridge contrast,obtains the practical significance result. 5.Subspace Iteration method used to calculate the natural frequency of the two-lane stable type suspension bridge and the corresponding vibration mode.And the results are calculated on the basis of the suspension bridge the structural damping for the dynamic response analysis of the data.6.Simulate the entire process of vehicles crossing the bridge,using the method that the dynamic load was simulated by mass element. Obtained the dynamic response characteristic data of the two-lane stable type suspension bridge,and acquired the deformation characteristics or distribution of internal forces under dynamic load function of each primary member.The paper findings indicated:the whole distorts,the bridge floor lateral inclinatio-nangle,and the stress and the distortion of primary member can be controlled in a certain permission scope,under the different states of static loads and dynamic load function.So the two-lane stable type suspension bridge is practical.