The Key Technology Research On Navigation Safety Assessment Of The Jiao-ganghe Bridge

This thesis is mainly from the natural environment,the port environment,traffic environment,as well as the navigation analysis.According to the theory of finite element analysis and in the process of collision mechanics principle,large-scale analysis software MSC.Dytran is used.Jiao-ganghe bridge steel temporary bridge and supporting rack ship in collision produced by displacement,velocity and collision force,energy absorption and damage deformation etc.are researched for the subsequent construction and operation of navigation safety assessment to provide technical support.(1)Describe the scheme of renovation project and the construction mainly.Analyze navigability mainly from the natural environment,the port environment,transportation and other navigable environment in this paper.Determine the territorial waters around the bridge.Analyze the influence between wading engineering and the natural environment and between traffic conditions and environmental.(2)Analyze the collision performance between cargo vessel and temporary steel bridge in the different programs.Study velocity,displacement,collision force and energy absorption characteristics and assess the crashworthiness synthetically.(3)Study the damage characteristics of between cargo vessel and support bent of Jiao-ganghe bridge.Through its non-linear technology research,use the finite element numerical simulation and get the law of the collision between the ship and the support bent,also provide technical support for the safety assessment of the construction and operation period.(4)It is the greater impact on the navigation bridge engineering safety on the Jiao-ganghe Bridge Construction.In the paper,not only analyze the impact on the safety andenvironment during construction,but also raise security measures during the operation.