Research And Analysis Of Curved Continuous Rigid Frame Bridge Internal Force

Curved Continuous Rigid Frame Bridge in practical engineering applications more andmore, but due to the bending-torsion coupling phenomenon, make the curve bridge stressanalysis is very complicated, more and more people are concerned about this problem. Andbecause of the Rigid Frame Bridge is statically indeterminate structure, when the bridge underthe action of temperature load secondary internal force generated, so it is necessary to analyzeand study the Curved Continuous Rigid Frame Bridge internal force.Based on consulting a large number of relevant materials, discussed the progress ofdevelopment status at home and abroad, the characteristics of the curved bridge and theprogress of analysis method. Introduces the concepts of bending, torsion, general differentialequation of curve beam was deduced in detail. The curve beams are analyzed using themethod of structural mechanics, the calculating formula of the curve beam of circular curve,and briefly introduces several finite element analysis method. A continuous rigid frame bridgein Shanxi as the engineering background, set up the space finite element model of seven kindsof different curvature radius of the continuous rigid frame bridge, through analyzing theresults of the model, the internal force distribution of the whole bridge under the action ofgravity and prestressing was obtained, the internal forces of the seven types of curvatureradius of bridge are analyzed and summarized, summed up the change laws of internal forcedistribution of constant load under the influence of radius of curvature. Comparative analysisof the internal force distribution of the curve continuous rigid frame bridge in the heating,cooling loads, about six full bridge internal force are discussed respectively, and theirdifferent distribution patterns in the heating and cooling loads. In-depth study of the internalforce distribution under temperature load, summarizes the variation of the heating loadinternal force under the different radius of curvature.