Mechanical Analysis Of Partially Cable-suspended Prestressed Concrete Bridge During Construction

Partially cable-stayed bridge originates Japan. Although partially cable-stayed bridges appear late in china, it is rigid and flexible and match the construction stress characteristics, furthermore it is economy and beautiful and rigid and convenient for construction so its development is very potential and it is particularly suitable for rigid railroad bridge. Because partially cable-stayed bridge appears late and is different from cable-stayed bridge and continuous beam bridge so the study of the construction control technique is important.With the construction of the Hemaxi bridge which is from Jiangmen to Zhuhai, every construction process is analyzed in order to provide the theories evidence and complete the construction mission of that bridge smoothly in this thesis.First, the merits and shortcomings of the finite element of space beam method and the beam gridiron method and the finite element of space plate method and the finite element of three-dimensional solid are generalized.Second, the mechanics model is established based on the feature of design and construction of partially cable-stayed bridge. Because the construction process is different from design, how to simplify its calculation model is very important. It compares various mechanics models and gets the brief and valid and reasonable mechanics model. Because the construction process is different from design, how to simplify its calculation model is very important. Various mechanics models are compared and valid and reasonable mechanics model is gotten.Third, the forward-iteration calculation method is adopted. It makes the result of linearity calculation as the initial structural shape, then begins to forward-iteration calculate until correspond the requirement of structural shape and design.Finally, after the construction scheme is determined, the whole construction process is simulated using the large and general and finite software ANSYS based on consideration of the temporary loading of the construction scheme and geometric and material nonlinear. The result of analyse and measure tally well, which proves the method is feasible.