Finite Element Analysis Of Construction Process Of Self-anchored Suspension Bridge

In recent years, the self-anchored suspension bridges have been favored by most of bridge engineers, owing to its beautiful shape and reasonable stress, and the number of our construction of self anchored suspension bridge also showed a rising trend. But the construction process of self-anchored suspension bridge is a complex nonlinear process, which requires us to advance to more accurate computational analysis of each construction stage of the ideal state, in order to determine the current state of the construction is consistent with, and can accurately guide the construction, so the precise finite element analysis of whole process of construction of the bridge has important scientific and practical value.The typical of a self-anchored suspension bridge as the engineering background,using the large finite element software MIDAS / CIVIL of the bridge construction process are analyzed and studied in detail.First introduced the suspension bridge calculation theory of the development process, focusing on the self-anchored suspension bridge deflection theory, and draw the relative to the earth anchored suspension bridge, self-anchored suspension bridge is more applicable to elasticity theory analysis of the conclusions. Then it describes the influence of the nonlinear material, geometry nonlinear and contact nonlinear of the self-anchored suspension bridge.On the basis, we detail several nonlinear equations solving methods: incremental method, iterative method and the incremental iterative method, also convergence criterion of nonlinear equation solving process made simple introduction. Finally, using the finite element software MIDAS/CIVIL for a self-anchored suspension bridge accurately modeling and analysis. And the construction process was calculated and analysed, to determine the each construction stage cable force, girder internal force of main tower, the conclusion can provide guidance for the construction of the bridge.