A Method of Identifying the Axle Load of a Single Vehicle Based on the Dynamic Strain of a Bridge

Abstract

The invention discloses a method for identifying axle load of a single vehicle based on bridge dynamic strain, wherein the method belongs to the field of bridge testing, health monitoring and overload vehicle control. A high-resolution strain testing device (sensor) is configured in a beam type bridge span or a maximal strain reaction cross section. A bridge dynamic strain time travel curve under the function of the vehicle is tested. Filtering noise-reduction or fitting is performed on the dynamic strain time travel curve. Furthermore one-order and two-order derivations are performed. According to a definite-element simulating result, a curve derivation result and vehicle driving speed, the axle load of the vehicle is calculated. According to the method of the invention, configuration of only one strain testing cross section on the bridge is required, thereby realizing simple mounting and low cost. Damage of a bridge surface structure or a pavement structure is not required, and no damage to an existing bridge load is realized. Furthermore simple recognition algorithm and high accuracy are realized.

Description

technical field [0001] The invention belongs to the fields of bridge test detection, health monitoring and overloaded vehicle treatment. Especially the method of identifying the axle load of a single vehicle based on the dynamic strain of the bridge. Background technique [0002] In recent years, there have been many major bridge accidents in my country. These accidents are related to many factors, but the lack of effective monitoring measures and necessary repair and maintenance measures is one of the important reasons. These shocking accidents make people gradually pay attention to the quality and life of modern bridges. It has become a research hotspot in domestic and foreign academic circles and engineering circles to carry out experimental detection, health monitoring and traffic control of overloaded vehicles on bridge structures. Traditional bridge detection relies heavily on the experience of managers and technicians, and often lacks a comprehensive grasp and unde...

AI Technical Summary

Problems solved by technology

Here, through experiments to find the relationship between driving speed, dynamic strain peak value and vehicle weight, there are problems of heavy workload and low adaptability, especially the structural characteristics of each bridge are different, which leads to the need for each installation. The bridges in use need to be subjected to closed tests, and the number of tests is high, the installation efficiency is low, and the installation and use costs are high. The degree of promotion is not high, and it cannot meet the current measurement needs of bridges in China.

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