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Cable-stayed bridge inhaul cable service life evaluation method based on monitoring data

A technology for monitoring data and life assessment, applied in the direction of specific mathematical models, electrical digital data processing, instruments, etc., can solve the problems affecting the accuracy of life detection, manual operation errors, etc., to ensure safe operation and reduce the effect of possibility

Pending Publication Date: 2020-09-08
JSTI GRP CO LTD
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Problems solved by technology

[0004] However, when the above-mentioned cable life detection method counts the position and size of the defect, it needs to be completed by manual operation. However, various errors will always occur in manual operation, which will eventually affect the accuracy of life detection.

Method used

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  • Cable-stayed bridge inhaul cable service life evaluation method based on monitoring data
  • Cable-stayed bridge inhaul cable service life evaluation method based on monitoring data
  • Cable-stayed bridge inhaul cable service life evaluation method based on monitoring data

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Embodiment Construction

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0029] Such as figure 1 The shown method for evaluating the service life of cables of cable-stayed bridges based on monitoring data includes the following steps:

[0030] S10: Obtain cable force monitoring data;

[0031] S20: dividing the cable state space;

[0032] S30: Determine the state distribution of the cables;

[0033] S40: Calculate the state transition probability matrix;

[0034] S50: Calculate and obtain forecast data according to the probability matrix;

[0035] S60: Obtain the remaining life of the cable according to the prediction data.

[0036] In step S10, the cable force monitoring data is the annual average value of the cable force and the fre...

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Abstract

The invention relates to the technical field of cable-stayed bridges, in particular to a cable-stayed bridge inhaul cable service life evaluation method based on monitoring data. The method comprisesthe following steps: obtaining inhaul cable force monitoring data; dividing an inhaul cable state space; determining inhaul cable state distribution; calculating a state transition probability matrix;calculating prediction data according to the probability matrix; and obtaining the remaining life of the inhaul cable according to prediction data. Massive cable force monitoring data of the health monitoring system are fully considered, the Markov process theory is taken as the basis, and the development of the future state of the cable force of the stay cable is mastered in time through the improved Markov prediction model, so that the stay cable is maintained in time, the damage possibility of the stay cable is reduced, and the safe operation of the cable-stayed bridge is guaranteed.

Description

technical field [0001] The invention relates to the technical field of cable-stayed bridges, in particular to a method for evaluating the service life of cables of cable-stayed bridges based on monitoring data. Background technique [0002] The cable-stayed cable is the main load-bearing structure of the cable-stayed bridge. It transmits most of the dead load and live load of the main girder to the cable tower through its own tension, so as to maintain the normal operation of the cable-stayed bridge system. The breaking life of cables of well-known bridges at home and abroad is estimated to be 2 to 16 years, rarely more than 20 years, and the average is about 1 / 10 of the service life of bridges. In the initial stage of bridge construction, the stay cables can better exert their working performance. However, as the service age of the bridge increases, the aging of the structure is inevitable, and the steel wire is very likely to corrode after the sheath is damaged, thus losi...

Claims

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Application Information

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IPC IPC(8): G06F30/27G06N7/00G06F111/08G06F119/14
CPCG06F30/27G06F2111/08G06F2119/14G06N7/01
Inventor 徐一超承宇张宇峰周树成
Owner JSTI GRP CO LTD
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