Detection for corrosion of stayed cable and evaluation method thereof

A technology for corroded stay cables and detection devices, applied in the direction of testing wear resistance, etc., can solve the problems of not considering the influence of cables, not considering the degree of corrosion of steel wires, not considering the influence of internal force distribution of the structure, etc.

Inactive Publication Date: 2012-01-11
TONGJI UNIV
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  • Abstract
  • Description
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Problems solved by technology

[0027] 1 The corrosion degree of the actual steel wire is not considered, but the steel wire is simply divided into two types: corroded steel wire and uncorroded steel wire, and the influence of the corrosion distribution of the steel wire in the actual cable

Method used

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  • Detection for corrosion of stayed cable and evaluation method thereof
  • Detection for corrosion of stayed cable and evaluation method thereof
  • Detection for corrosion of stayed cable and evaluation method thereof

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Embodiment Construction

[0115] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0116] This method is applicable to the detection and evaluation of the most common semi-parallel stay cables in China, and consists of the following steps:

[0117] 1 Install cable corrosion early warning detection device;

[0118] 2 Carry out relevant inspections and tests on the cables;

[0119] 3 Evaluate the bearing capacity of the cable;

[0120] 4 Set the detection interval of the cable.

[0121] 1. Setting of cable corrosion early warning detection device

[0122] Such as figure 1 As shown, the cable corrosion early warning detection device includes the following parts: test cable 1, test cable anchor device 2, test cable detection platform 3, and test cable rain collection device 4.

[0123] The test cable shall meet the following requirements:

[0124] 1) In order to ensure that the speed of rainwater flowing up and down the tes...

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Abstract

The invention discloses a detection of corrosion of a stayed cable and an evaluation method thereof. The method comprises the following steps: setting up an early warning detection device for corrosion of the stayed cable, using a test cable to simulate a bridge stayed cable; detecting the test cable, when the steel wire of the test cable with median diameter lower than 2.0mm exceeds 2% of total amount of the steel wire in the stayed cable, a profile cable detection is performed to the test cable, detecting the bridge stayed cable; evaluating the residual bearing capacity; and setting up an detection interval of the stayed cable for further. Compared with the present other methods, the detection method of the invention is more accurate, and the failure of the stayed cable caused by the oversized detection interval can be avoided, and the increased maintenance cost due to the undersized detection interval can be avoided either.

Description

technical field [0001] The invention belongs to the field of bridge engineering, and relates to a method for detecting the corrosion degree of stay cables on a cable-stayed bridge, in particular to a method for detecting and evaluating the corrosion degree of stay cables in use. Background technique [0002] Corrosion stay cable evaluation mainly consists of four parts: [0003] 1. Prediction of bridge loads; [0004] 2. Prediction of the corrosion rate of the steel wire in the cable; [0005] 3. Predict the corrosion degree of each steel wire on the section of the cable, and determine the mechanical indicators related to the bearing capacity of the steel wire; [0006] 4. The evaluation method of calculating the bearing capacity of the cable from the bearing capacity of the steel wire. [0007] 1. Bridge Load Forecasting [0008] According to the test results of many bridge cables in China (Xinjiang Kongquehe Bridge slings fail after 70% of the wires are corroded and br...

Claims

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Application Information

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IPC IPC(8): G01N3/56
Inventor 徐俊陈惟珍于振华严博翀左海宏邓楚涵
Owner TONGJI UNIV
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