A rapid method for measuring cable force of steel strand stay cables

A rapid measurement and steel strand technology, applied in the direction of tension measurement, etc., can solve the problems of inability to systematically evaluate the cable force of steel strand cables, and achieve the effect of simple and efficient test method, avoiding material size deviation, and accurate data

Active Publication Date: 2021-11-12
济南北环铁路有限公司 +3
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, several common test methods cannot completely evaluate the cable force of steel strand stay cables

Method used

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  • A rapid method for measuring cable force of steel strand stay cables
  • A rapid method for measuring cable force of steel strand stay cables
  • A rapid method for measuring cable force of steel strand stay cables

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Embodiment Construction

[0025] The present invention will be further described below by non-limiting examples:

[0026] Assume that a bundle of steel strand stay cables is composed of n steel strands in total, and is tensioned and hung with equal tension tension. Firstly, set the magnetic flux sensor and pressure sensor on the first installed steel strand, stretch the first steel strand to the design tension Y1d and anchor, record the magnetic flux value C1r and pressure sensor of the first steel strand value Y1r; then install and stretch the second steel strand to the design tension Y2d, record the magnetic flux value C2r of the first steel strand and the value Y2r of the pressure sensor; repeat the above steps until the completion of the nth steel strand Install and tension, and record the magnetic flux value Cn and the pressure sensor value Ynr of the first steel strand at the same time.

[0027] (1) Take the tension change as the main evaluation index to evaluate the uniformity

[0028] When th...

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Abstract

The invention discloses a method for quickly measuring the cable force of steel strand stay cables. The technical solution adopted is: install a magnetic flux sensor and a pressure sensor on the first steel strand of the steel strand cable, and simultaneously test the first steel strand during the subsequent installation and tension of the steel strand. The change of the magnetic flux and the tensile force of the steel strand, through the systematic analysis of the change law of the tensile force, it can be obtained whether the tensile force of each steel strand is uniform during the actual tensioning process of the steel strand stay cable, and at the same time the whole bunch of stay cables and The actual effective tensile force of each steel strand, according to the change law of the measured magnetic flux and tensile force, deduces the proportional relationship coefficient between the magnetic flux change and the tensile force change, and the proportional relationship coefficient between the magnetic flux change and the tensile force change is used in the subsequent stage. The magnetic flux method is used for the stay cables carry out testing. The testing method of the method of the invention is simple and efficient, has accurate data, and can meet the actual needs of engineering.

Description

technical field [0001] The invention relates to a method for quickly measuring the cable force of steel strand stay cables, which belongs to the technical field of bridge construction. Background technique [0002] At present, steel strand cable-stayed cables are widely used in large-scale cable-stayed bridge structures, especially in short-tower cable-stayed bridges. Compared with ordinary parallel steel wire stay cables, steel strand stay cables are generally composed of multiple independent steel strands, which have the obvious advantages of flexible configuration and large bearing capacity. Since the steel strand stay cable is composed of multiple steel strands, a single steel strand needs to be independently pulled and installed according to the equal tension tension method. After the first installed steel strands and the existing structure form a combined stress system, the subsequently installed steel strand stay cables will cause changes in the stress of the overall...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01L5/04
CPCG01L5/04
Inventor 姚德臣马成涛张守建李静马洪刚王爱平李晖华敬华井永军常春章杨波李从印金楷然朱礼业郑晓辉陈聪陈治任陈治行古宸谕高燕
Owner 济南北环铁路有限公司
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