Research On The Damage Of Bridge By Ship Collision Based On Numerical Methods

With the rapid development of social economy, the bridge was built on navigable riversincreasing, and the development of economy also prompted the water transportation of rapiddevelopment. Along the way under ship’s tonnage and level more and more high, whichmakes the contradiction between the ship and the bridge increasingly highlight, because of theimpact of the bridge collapse in ship accidents occur frequently. So, for the design of bridgeson navigable rivers, the ship collision is a problem to be reckoned with. In recent years, thereare a lot of research using finite element method based on simulation analysis of the shipcollision bridgesubstructure, and the results of this study also got more in engineeringapplication. This article in this context, based on the dynamic analysis software LS-DYNAanalyse the ship collision bridgesubstructure.First of all，consulting a large number of concrete dynamic constitutive relation literatureat home and abroad, And reviewed in this paper. Introduces some commonly concretedynamic constitutive models used in the engineering,which were used on the ship collisionbridge problems.Secondly,through the rigid ball hit the target concrete walls and the hammerhit reinforced concrete beam two groups of testing of the simulation analysis，which wereused to Compared the various concrete dynamic constitutive mechanics performance.Through the comparison of the results that reinforced concrete damage model can betterresponse the force and the structure damage after impacted. At the same time,I analyse thesensitive parameters for reinforced concrete damage model. Finally using LS-DYNA softwareto analyse the ship collision the bridgesubstructure Consider the main bridge structure of thestrength of the concrete and reinforcement percent and ship of the speed and the influence ofthe angle of the collision, And the calculation result is analyzed. The results indicate that thestrength of concrete and reinforcement percent, ship speed and angle influence the collisionresults, among which the most important influence is speed. The ship impact the bridgestructure in different parts will produce the different collision force,to collision bridgepierswill produce the biggest collision force.compared with collsion bearing platform,collisionbridgepier will produce great influence on the upper structure.This paper analyzes the various factors on the influence of ship impacting bridges, theresult of analysis, to cross the river bridge preventing ship collision design and set relatedstandard in China,has important reference value.