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Tensioning control method and device for stay cable of cable-stayed bridge

A control method and technology for cable-stayed bridges, applied in cable-stayed bridges, bridges, bridge forms, etc., can solve the problem of highly asymmetric structural stress, poor mutual confirmation of cable tensioning behavior, and stiffness of main girder mid-span and side span. Significant differences, etc., to achieve the effect of improving the efficiency of the survey and reducing the number of surveys

Pending Publication Date: 2022-03-18
RES INST OF HIGHWAY MINIST OF TRANSPORT +2
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  • Application Information

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Problems solved by technology

This type of bridge generally adopts an asymmetric structure, and most of them are constructed by the bracket method. During the construction process, the three-dimensional deformation characteristics are prominent. In the process of cable tensioning, the contact state between the tower girder and the bracket of the cable-stayed bridge and its evolution process are difficult to accurately simulate, and it is urgent to improve the cable force control method of the traditional cable-stayed bridge

Method used

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  • Tensioning control method and device for stay cable of cable-stayed bridge
  • Tensioning control method and device for stay cable of cable-stayed bridge
  • Tensioning control method and device for stay cable of cable-stayed bridge

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Embodiment Construction

[0031] Exemplary embodiments of the present application are described below in conjunction with the accompanying drawings, which include various details of the embodiments of the present application to facilitate understanding, and they should be regarded as exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the application. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.

[0032] figure 1 is a schematic diagram of a cable tensioning control method for a cable-stayed bridge according to an embodiment of the present application. The method may include the steps of:

[0033] S1. Based on the pulled-out amount of the anchor head, each cable is stretched to the length of the unstressed cable.

[0034] In the embodiment of the present app...

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Abstract

The embodiment of the invention provides a cable-stayed bridge inhaul cable tensioning control method and device. The method comprises the steps that each inhaul cable is tensioned to the unstressed cable length based on the pulling-out amount of an anchor head; determining a non-adjusting cable and an adjusting cable based on the cable force deviation of each inhaul cable; on the basis of the inhaul cable overall influence matrix and a quadratic form programming method, locking the non-adjustment cable, and determining the amplitude modulation of the adjustment cable; and the unstressed cable length of the adjusting cable is adjusted based on the conversion relation between the amplitude modulation of the adjusting cable and the anchor head pull-out amount correction value. According to the embodiment of the invention, the cable is adjusted by using the unstressed cable length and the anchor head pull-out amount, and the non-adjustment cable is locked based on the cable overall influence matrix and the quadratic form programming method, so that more accurate cable adjustment amplitude modulation can be obtained, more accurate adjustment amount can be obtained, the cable adjustment frequency can be reduced, and the cable adjustment efficiency can be improved.

Description

technical field [0001] The present application relates to the technical field of civil engineering, and in particular to a method and device for controlling cable tensioning of a cable-stayed bridge. Background technique [0002] Cable-stayed bridge, also known as cable-stayed bridge, is a bridge in which the main girder is directly pulled on the bridge tower by many cables. structural system. Cable-stayed bridges are mainly composed of cable towers, main girders, and cable-stayed cables. [0003] Along with economic and social development, cable-stayed bridges with aesthetic appeal of space modeling emerge in endlessly. This type of bridge generally adopts an asymmetric structure, and most of them are constructed by the bracket method. During the construction process, the three-dimensional deformation characteristics are prominent. In the process of cable tensioning, the contact state and evolution process of the tower girder and the support of the cable-stayed bridge ar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00E01D11/04
CPCE01D21/00E01D11/04
Inventor 李鹏飞毛燕王石磊刘毅
Owner RES INST OF HIGHWAY MINIST OF TRANSPORT
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