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Real-time bridge load identification method based on influence matrix

A technology that affects matrix and load identification, which is applied in special data processing applications, instruments, electrical digital data processing, etc., and can solve problems such as strong restrictions, inability to identify and measure multiple types of loads, etc.

Inactive Publication Date: 2013-08-28
CHONGQING JIAOTONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the embodiments of the present invention is to provide a real-time load identification method for bridges based on an influence matrix, aiming at solving the problem that the current real-time load identification methods for bridges in my country are relatively restrictive and cannot identify and measure multiple types of loads

Method used

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  • Real-time bridge load identification method based on influence matrix
  • Real-time bridge load identification method based on influence matrix
  • Real-time bridge load identification method based on influence matrix

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Embodiment Construction

[0033] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0034] The invention provides a bridge real-time load identification method based on an influence matrix, which includes the following steps:

[0035] According to the bridge monitoring purpose and accuracy requirements, arrange some displacement, rotation angle and strain sensors on the bridge;

[0036] According to the bridge structure form and load characteristics, the bridge load is equivalent to the combination of characteristic loads;

[0037] Establish the finite element analysis model of the bridge, and separately calculate the measured values ​​of each sensor caused by various unit characteristic loads;

[0038] ...

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Abstract

The invention discloses a real-time bridge load identification method based on an influence matrix. The method includes: according to bridge monitoring aims and precision requirements, setting displacement, angle and strain sensors on a bridge; according to bridge structural form and load features, equaling bridge load into a feature load combination; establishing a finite element analysis model for the bridge, and separately calculating measured values of each sensor caused by each unit feature load; combining the measured values of the sensors caused by the unit feature loads into the influence matrix; according to the measured values of the sensors, calculating the magnitude of the feature load, as current actual load of the bridge; and calculating deformation and stress mechanical parameters of a concerned position of the bridge, and evaluating safety state of the bridge according to the mechanical parameters. The method is applicable to various types of identifiable or equivalent basic loads and various type of measurement information, including absolute or relative displacement, absolute or relative angle, strain, internal force, external force and the like.

Description

technical field [0001] The invention belongs to the field of bridge load identification, in particular to an influence matrix-based real-time load identification method for bridges. Background technique [0002] Bridge load refers to the general term of various possible loads that should be considered in the design of bridge structures, including dead loads, live loads and other loads. Including railway train live load or road vehicle load, and the impact force, centrifugal force, lateral sway force (railway train), braking force or traction force caused by them, crowd load, and earth pressure generated by train vehicles, etc. [0003] The dead load includes the self-weight of each part of the bridge, the pre-stress, the impact of concrete shrinkage and creep, the vertical and horizontal pressure of the soil due to its own weight, hydrostatic pressure and buoyancy, etc. Live loads, including railway train live loads, road vehicle loads, impact forces, centrifugal and latera...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 王家林陈卓陈世民
Owner CHONGQING JIAOTONG UNIVERSITY
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