Analysis method for whole process of cable hoisting

Abstract

The invention discloses an analysis method for the whole process of cable hoisting. The method includes the steps that a cable hoisting analysis model without a main cable and a cable saddle is established according to a construction drawing; an initial catenary equation of the main cable under the action of gravity is obtained by a flexible iteration method, then the part of the main cable in theconstruction possibly contacting with the cable saddle is selected and simulated with a flexible shell unit, the other part of the main cable is simulated with a bar unit, the cable saddle is simulated with a rigid shell unit to construct a cable saddle-main cable simplified model; in the cable saddle-main cable simplified model, a target unit of which the direction faces outward is established on a cable saddle shell, a contact unit of which the direction faces inward is established on a main cable shell unit, and accordingly a frictional contact pair model with the cable saddle as the target unit and the main cable as the contact unit is established; and a whole model of the cable hoisting whole process analysis is established. According to the analysis method, mechanical states of eachcomponent of cable-arch-rope-tower in the construction process can be more accurately simulated, and a more reliable basis for structural design, structural safety and linear control of arch rib installation is provided.

Description

technical field [0001] The present application relates to the field of construction engineering, in particular to an analysis method for the whole process of cable hoisting. Background technique [0002] In recent years, cable-stayed buckle-hanging cable hoisting systems have been widely used in the construction of long-span arch bridges without supports, and the integration of cable buckles has become a development trend. Since the main cable and the buckle cable share a tower, the cable-stayed buckle-hanging system and the cable hoisting system are coupled with each other, and the cables, cables, towers, and arches interact with each other, and the mechanical state is very complicated. The design and calculation are usually based on Therefore, establishing an accurate numerical analysis model is the key to study the mechanical state of the cable-stayed buckle-hanging cable hoisting system. However, in the process of model creation, limited by the software's own functions ...

AI Technical Summary

Problems solved by technology

At the same time, a few scholars conduct analysis by considering the change of the tangent point of the cable at the turning point. [9-11] , but this type of analysis only simply considers the force sliding of the cable, and does not consider the horizontal displacement of the top of the tower, which will cause the original reference point to change, and does not consider the relevant effects with the tower, main arch, etc.

Images