The Simulation And Calculation Of The Construction Process Of Six-Tower Cable-Stayed Bridge

The construction monitoring of Cable-stayed bridge is important for safely construction. The geometry control method based on the whole construction process has its unique advantages in the construction monitoring of large-span cable-stayed bridge. In this thesis, the author uses finite element software-Midas/Civil to establish the space model of the whole bridge and makes construction process analysis based on the project of Jiashao Bridge in Zhejiang province, analysing the construction process, especially the changes of structural displacement and force in the closing stages,and analysing the influence of structural response of the maximum double-cantilever stage under the cross-bridge wind load and asymmetric lifting crane load.1. Jiashao Bridge is a structure with steel box girder which has six towers and double-width floor system with four cable planes.There is a rigid hinge at mid-span and beams between the main beams. Accurately simulate the characteristics of the structure is the key to modeling.2. Jiashao Bridge is a six-tower cable-stayed bridge, and there are seven closures. The difference of closure sequence corresponding to different construction system conversion and the force to the structure is also not the same. This study will give some help on the construction technology in the future.3. The maximum double-cantilever stage is a critical construction phase,and the capacity to resist unfavorable load is also the most vulnerable. Jiashao Bridge is a double-beam structure,which is essential to maintain the symmetry of the load in space. The analysis of the structural response in the maximum double-cantilever stage under the cross-bridge wind load and asymmetric lifting crane load will provide some references for future bridge design.