On shear lag effect analysis of prestressed box girder at cantilever construction stage

Combining with the construction control in the large-span high pier continuous rigid frame bridge,the study undertakes the bridge test analysis on its shear lag effect,researches the normal stress of the box girder section in the bridge construction process by adopting Ansys finite element analyzing method,undertakes the comparison between the calculation results and the test one,and concludes the distribution law of the positive and negative shear lag in the construction process of the large-span high pier continuous rigid frame bridge,so the conclusion has the reference value for the design and construction of similar bridges.