Deformation Analysis Of Curved Girder Bridges In Construction Stage

Along with the augment of bridge span, construction control became more vital and attention. The paper takes the Luo He large Bridge as an object of the study and focuses on the research of two points including structure analysis and ratio control of PC continuous rigid frame bridge in construction with the cast-in-place cantilever method. The research mainly includes such contents as belowFirstly, thoroughly investigating into present analysis methods of bridge structures, assembling analysis method and disassembling analysis method are theoretically analyzed and compared. By discussing the two calculation methods, a simply available method meeting the precision is established.Secondly, a bridge structure analysis software, MIDAS/CIVIL, was used to erect the mode of the bridge. Through calculating and analysis, this paper gave out the displacement, internal force and stress results of the continuous rigid-frame bridge, and contrasted the analysis results and the measuring results.Thirdly, construct line-type control of box beam for PC continuous rigid frame bridge in cantilever construction process is very important. Joining precision of the bridge is mostly dependent on vertical deformation control, which is crucial for guaranteeing geometric control within the range of the permission of design. By analyzing factors relative to construct line-type control, such as separation of actual deflection of box beam, segmental vertical deformation, accumulative vertical deformation, some available conclusion is achieved.