Numerical construction simulation of cable-stayed bridges

In this paper a numerical construction simulation system for cable-stayed bridges is detailed based on the measurement results, with the uncertain parameters being identified, and the state is adjusted by optimizing the designed pre-tension forces of cables during each construction stage. The proposed identification method puts the emphases on the most recent measurement results with the anterior ones being considered simultaneously but less importantly by introducing a "forgetting factor", so that the obtained results will represent the changes of the parameters with time. By taking undeformed pre-tensions as the adjusting means, the structural analysis computation is reduced to the minimum, so the proposed adjustment method is not only clear in concept, but also convenient for operating and therefore effective for guiding the construction process. A simple numerical example is shown which briefly describes the main procedures.