Real-time bridge load identification method based on influence matrix

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...

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

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