Researches On Reasonable Tensile Force Of Single-pylon Cable-stayed Bridge

The stress and the linear of single tower cable-stayed bridge can satisfy regulation by thecable hanger forces, So we can pass into a completed bridge to optimize the force ofcable-stayed bridge. When the stress of the cable-stayed bridge system is determined, we canfind a set of cable force, namely the reasonable completed bridge, cable-stayed bridge is madeto reach a reasonable bridge stress state. In the single fold tower cable-stayed bridge, the foldtower mainly affects the overall structure of cable-stayed bridge s stress. Therefore, thestress of reasonable bridge must ensure that the stress of folding tower cable-stayed bridge.This paper studies the two problems: First what is a reasonable bridge state; The secondhow to adjust the cable force to get the state into a bridge.This paper summarizes the determine reasonable into completed bridge method, Theinfluence matrix method and the principle of minimum bending energy method wasanalysised. Compared these method and analyzes their respective advantages anddisadvantages. The measured values and compares the design value, have certain guiding roleon the construction process.In the calculation and design of cable-stayed Bridges, determine the target state into abridge is a vital work. In this paper, the Changxing Lvshan bridge are calculated, by usingMidas Civil software whole bridge model is established, the influence matrix method isadopted for the whole bridge are analyzed. Calculate the unknown load factor first, and thenuse line control function for the cable, through times of cable force adjustment, finally got theoptimum cable force of the whole bridge, namely the stress of reasonable bridge.Cable-stayed bridge is very important for the reasonable state into a bridge, this would bea major problem in research of Bridges in the future. Believe that we can get a more effectivemethod, makes the cable-stayed bridge structure and stress is more reasonable.