A method for identifying the number of vehicles in a fleet based on bridge dynamic strain

Abstract

The invention discloses a method for recognizing vehicle quantity of a motorcade based on dynamic strain of a bridge and belongs to the field of bridge test detection, health monitoring and overload vehicle treatment. The method comprises the following steps: arranging a high-resolution strain test device (sensor) in a beam bridge span or a maximum strain reaction section; testing a dynamic strain time travel curve of the bridge under the effect of the motorcade; performing filtering noise reduction or fitting on the dynamic strain time travel curve; performing first-order and second-order derivation; and combining a finite element modeling result, a curve derivation result and a vehicle running speed for calculating and acquiring the vehicle quantity of the motorcade. According to the method, only one strain test section is arranged on the bridge, the mounting is simple, and the cost is low; the deck or pavement structure is not damaged, and the present bridge road is not damaged; and the recognizing algorithm is simple, and the accuracy is high.

Description

technical field [0001] The invention relates to the fields of bridge test detection, health monitoring and overloaded vehicle management, in particular to a method for identifying the number of vehicles in a fleet 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 understand...

AI Technical Summary

Problems solved by technology

Here, the simulation scheme is established, and the judgment of the number of axles is realized by the response time history curve, but it is necessary to install multiple sets of sensors for the purpose of cross-referencing, which has the disadvantages of complex installation and high cost

At the same time, this method cannot be used to count the number of vehicles or identify the traffic flow when many vehicles pass the bridge

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