Finite Element Analysis For Large U-type Prestressed Thin-walled Aqueduct

With the economy develop rapidly in our country,it has appeard the phenomenon of insufficient water supply or maldistribution,and the contradiction increasingly. In order to address the status of water resources are unevenly distributed, raised the idea of the project of South-to-North water transfer. The aqueduct is an important part of the project of South-to-North water transfer,because of the importance and scale of the project of many aqueducts is very large, in order to make the structure with sufficient crack resistance and impermeability, common reinforced concrete structures can not meet the requirements, and therefore must be using prestressed reinforced concrete structures, prestressed concrete not only has strong anti-crack and impermeability, but also can reduce the dead weight, full use of the material strength in order to achieve economic and reasonable. In this paper, analyzing and researching the prestressed concrete aqueduct.First, discussing the development and background of prestressed reinforced concrete and aqueduct as well as the characteristics and the distribution of prestress loss calculation method, and with the combination of large-scale analysis software ANSYS, and discusses the method of ANSYS in the imposition of Prestressed. Practical project,a concrete analysis of a large aqueduct laws of force and deformation characteristics.The use of the finite element software of Ansys solve the problem of the finite element analysis of Shahe prestress concrete Aqueduct,which is attached to the project of South-to-North water transfer,the method of initial strain is used to apply prestressing force. There are four operating conditions are finished construction period, design water level,increase the water level and bankfull stage.The yield value joined steel stranded wire were compared with the value non-stranded. With the relevant provisions, the aqueduct body joined steel stranded has sufficient strength and rigidity,and the structure is safety and reliability, the program of prestressed Aqueduct is feasible. As for the U-type structure Shahe Aqueduct, steel strand divided into longitudinal strand and ring strand. In the construction process will occur contradiction between the sequence pr-tension. Using the finite element simulation analysis, discussing and arriving an optimal construction plan, provided for the organization of the construction provides a basis theoretical basis. In order to achieve the goals of shorter construction period, construction convenient and the safety structural.