Stability Analysis and Control in the Rotating Construction of Prestressed Concrete Continuous Girder Bridge
A systematic study is carried out on the rotating continuous girder spanning 207 provincial highways and the existing Longhai Railway.The stability and stress distribution characteristics of the structure is investigat-ed in the process of acceleration and uniform rotation through the combination of numerical simulation and test.The effects of different rotation speeds and accelerations on the force state of the main girder are analyzed,and the deformation behavior of the material after the bearing capacity reaches the critical value is derived.Emphasiz-ing the necessity of controlling the load application during the construction process to prevent the structural dam-age due to exceeding the tensile strength.It is revealed that the deformation of the main girder gradually shifts from elasticity to nonlinearity as the load increases,and the stress concentration phenomenon may cause localized damage to the structure.Therefore,monitoring means are required to track the deformation in real time in order to formulate an effective control strategy in engineering practice.This study provides a solid theoretical foundation and practical data support for the safe construction and design of rotating continuous girders.
万方数据
维普
