The Bracket Finite Element Analysis Of Cast-in-place Root Of Main Girder Of Continuous Rigid Frame Bridge

Main girder of continuous rigid frame bridge root block0is the use of hanging basketcantilever casting foundation and starting platform. When the pier is high, we usually build aerection of temporary triangular bracket on the pier for construction of0block. Large SpanContinuous Rigid Frame Bridge No.0block weight is often very large, hence accuratecalculation for the temporary triangular bracket structure force is needed, to ensure that thebracket in the construction process of the strength, stiffness, stability meet the requirements.This paper applies the finite element program Midas/civil simulation actual stresscondition, to a continual rigid frame bridge0,1block of cast-in-place triangular bracket areanalyzed. The main research contents are as follows:(1) Reviews the continuous rigid frame bridges development and construction of0block’several common methods, proposed triangular bracket structure stress calculation method andusing the triangular bracket construction of block0advantages.(2) Described the use of finite element method on the bracket structure stress. Numericalanalysis of the basic theory, methods, ideas and steps.(3) According to a continuous rigid frame bridge with engineering background, on the0,1piece of cast-in-site bracket structure, installation, preloading design and layout.(4) Using the finite element program Midas/civil analog carrier force, in the actualconstruction loading conditions on the bracket of each rod and connecting pieces of the stress,displacement analysis, the corresponding norms on the bracket strength, stiffness, stabilitycalculation.