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System and method for judging initial tension and voltage stabilization time of prestressed steel strand

A technology of prestressed steel strands and stable voltage time, which is applied in the direction of applying stable tension/pressure to test material strength, instruments, and measuring devices. The effect of construction quality, simple test method and accurate test data

Active Publication Date: 2020-12-29
SHANDONG UNIV
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Problems solved by technology

At home and abroad, there are few studies on the initial tension load and stabilization time of ultra-long strands, and the research results are limited to the steel strand test in specific projects, and no unified calculation model has been formed. The influence of the prestress loss of the bridge is extremely critical, so it is particularly important to carry out research on the initial tension load and stabilization time of prestressed steel strands under different lengths
[0003] The inventors found that the research on the initial tension load and stabilization time of prestressed steel strands is still blank, and further research is still needed

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  • System and method for judging initial tension and voltage stabilization time of prestressed steel strand

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[0035] It should be noted that the following detailed description is exemplary and intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in this embodiment have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

[0036] It should be noted that the terminology used here is only for describing specific embodiments, and is not intended to limit exemplary embodiments according to the present invention. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.

[0037] As introduced in the background technology, according to the research, there are few researches on the initial tens...

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Abstract

The invention discloses a system and a method for judging the initial tension and voltage stabilization time of a prestressed steel strand. The method comprises the following steps of: drawing a curveof the initial tension load and the voltage stabilization time changing along with the length of the steel strand through a test for testing the change of the initial tension load and the voltage stabilization time under different lengths of the steel strand; and analyzing the influence rule of the length of the steel strand on the initial tension load and the voltage stabilization time, and performing data fitting regression on the test curve to obtain a mathematical regression model of the length of the steel strand-the initial tension load and the length of the steel strand-the voltage stabilization time respectively. By means of the model, the initial tension load and the voltage stabilization time of the steel strand can be accurately judged according to the length of the tensioned steel strand, the tension quality of the prestressed steel strand is improved, the practicability is high, and the engineering quality of an actual bridge is improved.

Description

technical field [0001] The invention relates to a system and a method for judging the initial tension and voltage stabilization time of a prestressed steel strand. Background technique [0002] Driven by the rapid development of the domestic economy, bridge construction has also entered a stage of rapid development. Among them, the prestressed concrete bridge structure has been widely promoted in the field of highway and railway bridge construction because of its good performance and superior spanning ability. With the development of prestressed bridges, various problems have also been discovered. According to research, "Technical Specifications for Construction of Highway Bridges and Culverts" (JTG / TFSO-2011) stipulates that in order to effectively ensure that the tension construction quality of prestressed steel strands of different lengths meets the requirements and avoid the loss of effective prestress, it is necessary to target the initial tension load and The stabili...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N3/06
CPCG01N3/06G01N3/08G01N2203/0017G01N2203/0676G01N2203/0682
Inventor 张峰王晗高磊王大伟
Owner SHANDONG UNIV
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