A method for identifying the wheelbase of a single vehicle based on bridge dynamic strain

Abstract

The invention discloses a method of identifying a single vehicle wheelbase based on a bridge dynamic strain and belongs to the bridge test detection, health monitoring and overloaded vehicle management field. A high-resolution strain test device (sensor) is arranged in a beam-type bridge span or on a maximum strain reaction cross section so as to test a bridge dynamic strain time history curve under a vehicle effect. Filtering noise reduction or fitting is performed on the dynamic strain time history curve, first order or second order derivation is performed, and a finite element simulation result, a curve derivation result and a vehicle driving speed are combined so as to calculate and acquire a vehicle wheelbase of the vehicle. In the method, only one strain test cross section needs to be arranged on a bridge, installation is simple and cost is low; a bridge floor or pavement structure does not need to be destroyed, and an existing bridge road is not damaged; an identification algorithm is simple and accuracy is high.

Description

technical field [0001] The invention relates to the fields of bridge test detection, health monitoring and overloaded vehicle control, in particular to a method for identifying the wheelbase of a single vehicle based on bridge dynamic strain. 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 understanding...

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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