The Parameter Analysis And Construction Control Of Large-inclination Cable-Stayed Bridge Without Backstays

Cable-stayed bridge without back-stays is an important branch of family of cable-stayed bridge, It puts the bridge tower tilted to one side and remove the cable behind, using tilt pylon weight to balance the gravity of main girder, and has the characteristics of novel structure, beautiful modeling, it is quite popular in the construction of cities at home and abroad. In this paper, based on the Jinzhou bridge construction projects, using the finite element analysis software to establish spatial model and simulation analysis of construction process, this paper studies the determination of reasonable construction state, parameter analysis, the pylon inclination impact and construction controlling. Main work is as follows:In the process of construction of Jinzhou Bridge are simulated, using formal analysis method to determine the reasonable construction state, and calculate the initial tension and two tension, the bridge is analyzed by calculation in the typical structure of the stress and deformation in the construction process, which provides the theoretical foundation for construction control;Because it is studied less at present about how the parameters which account for cable-stayed bridge without backstays effect on completed bridge state. so this paper conducts dead-weight of structure、structural stiffness、and shrinking creep to analyze whose effects on the structure in completed bridge state. And studies the effects of the tower angle on the internal force and cost structure;The stress of the cable-stayed bridge without back cable state is close to the inclination of the tower, this article through changing the Angle research of bridge tower structure changes, draw a bridge tower Angle influence on bridge structure performance and cost;Jinzhou Bridge is novel in structure and complicate in technology, the tower angle is the biggest of the similar Bridges, Construction control is difficult, this paper adopts adaptive control theory of Jinzhou bridge construction control, this paper introduces the control content and method, and achieved good control effect.