Study Of Control And Structural Analysis In Numerical Simulation Of PC Cable-Stayed Bridge's Construction

This thesis is mainly focused on the analysis method in numerical simulation of mechanic behavior of the long-span cable-stayed bridge in construction and the computer programming. Factors that must be considered in the mechanical model of construction analysis is discussed. The real-time algorithm of construction numerical simulation, the construction calculation in the maximum cantilever state, and the optimum of the cable tensile forces in the construction is also investigated. Beam-column effect,large deflection effect,elongation of the cable and the other geometrical nonlinearity and structural secondary internal forces which causes from the prestress, the creep and shrinkage of concrete and the temperature in the mechanical model are inducted. The real-time algorithm is the combination of the forward analysis and backward analysis. The static, stable and dynamic analysis are included the constructional calculation. The method of the structural optimum design is used in the optimum of cable forces. This thesis is based on the finite element method and computer numerical analysis. The tangent stiffness matrix of plane beam element is derived using the minimum potential energy principle, and the coordinate mass matrix is derived using virtual displacement principle. The stable and dynamic analysis with the finite element method is corespond with the eigenvalue and eigenvector analysis. Based on the theoretical analyses, the present writer programming the engineer application software Cable-Stayed Bridge Construct Analysis System (CSBCAS ). This software is designed for windows operation system and the operation of data input and output is visual. This software is easy to using and the resolution is reliable and directly perceived. The numerical simulation of the construction practice of the Yi Chang Yi Lin Yang Zi river bridge is investigated in this thesis.