STUDY ON ERROR ADJUSTMENT OF SELF-ANCHORED SUSPENSION BRIDGES IN CONSTRUCTION
For the self-anchored suspension bridge, a stiffening girder must be erected prior to the construction of main cables because it functions as a supporting structure for the main cables. One method that is gaining popularity in recent years is to use temporary piers or falseworks to support the girder, and then perform system transformation by tensioning of the hangers. However, the errors of design parameters such as main cable length, self weight of girder, span length and so on often appear in construction. If the errors overtake determinate tolerance, the hangers will go beyond the adjustable range. Therefore, more accurate length of main cables and hangers, which is applicable for composite tolerance of key design parameters, must be predetermined. The concept of allowable composite tolerance of unstrained length of main cables and hangers is proposed, and the relationships between the errors of design parameters and the final state of self-anchored suspension bridges are discussed. Moreover, a new method to modify the errors generated in the construction process is developed in this paper.