Research Of Concrete Filled Steel Tubular Arch Boom Damage And Replacement

For bridge construction, every kind of bridge is a revolution in the development of thebridge community. Concrete filled steel tubular(CFST) arch bridge appeared, has been widelyrecognized and favored the bridge community. Combined with steel and concrete, theadvantages of the two materials to the extreme. Construction of concrete arch rib convenient,eliminating the previous construction of reinforced concrete arch rib erection brackets andtemplates to this procedure. Concrete filled steel tubular light weight, convenient construction,short construction period, etc. These advantages have established a bridge between industrycan not shake it in position. Concrete Filled Steel Tubular Arch very competitive in large andmedium span bridges. Especially in urban bridges, appearance, short construction period, etc.enough to make it stand out from a variety of bridge became the winning solution. With theswivel construction of concrete filled steel arch bridge across the busy transport tasks bothlines, in the mountains across the cliff, it can play its unique advantage of being able togenerate significant social and economic benefits.With the increase of Concrete filled steel tubular arch bridge operator time, some of itsshortcomings are gradually exposed, especially the destruction arch boom. Actual life archboom far less than the design life, because the boom protection and external damage and otherreasons, so that the life of the boom end prematurely, while the cost of construction of thenew bridge is too high, in order to save resources, shall reinforcing bridges not replacedamaged boom. Therefore, the study of the destruction of Steel Arch and boom replacementis very urgent.In this paper, damaged concrete filled steel arch bridge suspender first analyze thereasons and put forward the corresponding solutions. Then replace the boom constructiontechnology from the start, the background of the project101.4meters in Concrete filled steeltubular arch bridge construction method to replace the boom, construction control andconstruction of key issues were discussed in detail and research. This paper carried out thefollowing tasks: First, the mechanism of breakage boom-depth analysis and proposeappropriate protective measures. Second, the introduction of the Construction of Steel Archreplacement method, the background of the project construction boom replacement program,the technical standard given a detailed description of proposed construction matters needattention to ensure the background of the project to replace the boom smoothly. Third,according to the characteristics and background of the project construction steps, detailedfinite element simulation of the construction process. Construction process through finiteelement simulation of the construction process deck elevation changes, suspender forcechanges were analyzed to study the reasons for the existence of errors in the actualconstruction of the finite element simulation results, and the construction work is proposed toreplace the boom suggestions and comments.In the construction of the nineties boom damaged Concrete filled steel tubular arch bridgeproblem is getting worse, a lot of the bridge due to the destruction of the boom boom must bereplaced. We should see that in this case, replace the boom construction process to ensure thesmooth flow of transportation safety has obvious social benefits, has broad applicationprospects.