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Improved stay cable equivalent tensioning method construction method based on deformation control

A deformation control and construction method technology, applied in the direction of erecting/assembling bridges, bridges, buildings, etc., can solve the problems of construction accuracy and control process need to be improved, and achieve the effect of abundant test data, short time consumption, and stress monitoring.

Pending Publication Date: 2022-04-12
CCCC SHEC FIRST HIGHWAY ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing equivalent tensioning method still has certain defects in the initial tension calculation and stress monitoring during the construction process. Due to the discrete and creep characteristics of the cable itself, the existing equivalent tensioning method Construction accuracy and control process need to be improved

Method used

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  • Improved stay cable equivalent tensioning method construction method based on deformation control
  • Improved stay cable equivalent tensioning method construction method based on deformation control
  • Improved stay cable equivalent tensioning method construction method based on deformation control

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Embodiment Construction

[0074] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0075] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes onl...

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Abstract

The invention discloses an improved stay cable equivalent tension method construction method based on deformation control, which comprises the following steps: S1, performing a tension test on a single steel strand, taking a plurality of steel strands in the same batch, performing the tension test on the steel strands, and recording a stress-strain relation curve in a loading process, determining proportional limit stress at the end of the linear elastic section according to the stress-strain relation curve; s2, carrying out first-time tensioning calculation, and determining overall deformation parameters of the stay cable tensioning structure; s3, secondary tensioning calculation is conducted, specifically, the initial tensioning force of the control steel strand is calculated according to the overall deformation parameters of the stay cable tensioning structure; and S4, an improved equivalent tensioning method construction process based on deformation control is carried out, and the equivalent tensioning method construction process of stay cable final tension monitoring based on deformation control is provided by taking an equivalent tensioning method as the basis and combining accurate initial tensioning force calculation and deformation monitoring in the construction process.

Description

technical field [0001] The invention relates to the technical field of cable-stayed cable construction, in particular to an improved cable-stayed cable equivalent tensioning construction method based on deformation control. Background technique [0002] As a complex structural system composed of cable towers, main girders, and cable-stayed cables, cable-stayed bridges have the outstanding advantages of reducing building height, reducing structural weight, and saving building materials. They are widely used in bridge engineering. , is used as the main bridge type of long-span bridges. Among them, the stay cables, as the main tension components, are of great significance to the safety, stability and performance of the overall structure. Due to the prestressed stay cables, there is a construction process of pre-tensioning, and the process operation is complicated. Multiple stay cables The uneven stress will affect the effectiveness of the stay cable. [0003] Relevant scienti...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D21/00
Inventor 刘盛林杨志华赵顺利李张刘畅于修斌周健
Owner CCCC SHEC FIRST HIGHWAY ENG
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