Sophisticated Non-Linear 4D Structural Analysis for Cable-Stayed Bridges

A methodology to cover the needs of the design office and the contractor within one computer program has been implemented in RM program and presented. Using a finite difference in the time domain and Newton/Raphson for structural non-linearities the algorithm includes coupled effects of the creep, shrinkage and steel relaxation within overall structural non-linear analysis. Cable sagging, p-delta effects, large displacements and contact problems are combined with long term effects within consistent analysis. The computer program automatically follows the bridge erection procedure and predicts the exact geometric position of structural segments taking into account the construction method, the construction sequence, the loading history, pre-stressing and post-tensioning, changes in support conditions and geometry and time-dependent effects.