Cable Force Optimization Of Cable-stayed Bridge Casting In Place On All Supported Framework And Definition Of Construction Stage Cable Force

In this paper, based on interchange C bridge in ring road, the author studies on the cable force optimization, solving construction stage force, of cable-stayed bridge casting in place on all supported framework. In this paper, the author unifies bending energy, bending moment quadratic sum, sub-optimization, weighing optimization to quadratic programming problem, analyzes difference between them, and discusses the solution of quadratic programming. Using strain energy as objective function and bounding mechanical quantity of main section in range safety are to achieve the least usage of cable. During calculation, we may select different constraint condition and local restrictions. The architect can obtain different optimization cable force simultaneously and be convenient to compare and to select. Using strain energy and displacement square normal number as objective function, the author solves the cable force and analyses the difference between them. The author uses influence matrix to calculate construction stage force, which is clear in mathematic concept. The study result may be referred by architect.