Space Simulation Analysis On The Rib-Hoisting Construction Of Long-span CFST Arch Bridge

The CFST arch bridge is a new technology of bridge building development in recent years in our country, because of its light deadweight, high intensity, and advantage with strong ability of resisting shape. The CFST arch bridge gets the substantial development in our country highway and city bridge, not only the number increases gradually, but also the acrossing degree enlarging continuously. Rib-hoisting construction of the long-span CFST arch bridge is a complicated course, it need to adopt space simulation analysis in order that final shape of the bridge and state of strength meet the designing requirement, and offer rational scientific dates for construction controlling.Based on the consulted a number of books about simulation calculation of long-span bridge construction in nation and international, this paper explain the theory of space simulation analysis of long-span bridge;Through simulation analysis of rib-hoisting construction course of through long-span CFST arch bridge, the detailed approach of space simulation analysis of rib-hoisting in long-span CFST arch bridge is given out, and activation and passivation technology is introduced in the course of modeling for facilitating the stage analysis of construction, invariable cable method based on unknown load factor is introduced in calculating and optimizing cable forces.When the space simulation analysis procedure is applied to the rib-hoisting process of NanNidu arch bridge, space model suited to the case is established, the pre-rising elevation on the rib-hoisting course is predicted, and real-time control is discussed. The space simulation analysis result indicates: simulation analysis of construction not only describe the whole construction course, response the strength behavior of whole construction course, but also confirm the rational state at stage of each construction, offer the middle goal state for constructing and monitoring controlling. Construction simulation analysis has become a dominating method of static analyzing modem bridge already.