A method and system for axle information identification and early warning based on bridge lateral strain

Abstract

The invention provides an axle information identification and early warning method and system based on bridge lateral strain. The method includes: respectively arranging sensing units at the bridge entry end and the exit end of the bridge; obtaining axle parameters of standard vehicles under standard load conditions, collecting The strain response data of the standard vehicle entering and exiting the bridge are processed to obtain the strain difference and vehicle speed caused by the axle load of the standard vehicle; the strain response of the sensing unit at the entering and exiting the bridge under the load condition of the vehicle to be identified is collected data, obtain the vehicle speed, wheelbase and axle weight ratio of the vehicle to be identified, and obtain the total weight of the vehicle to be identified according to the front axle load of the standard vehicle, the standard vehicle strain difference and the vehicle speed; Overspeed and overload early warning system includes regional distribution sensor monitoring system, data system, analysis system and early warning system. The invention does not need to identify various physical parameters of the bridge, so that the overspeed and overload early warning of the bridge on the bridge can be completed conveniently and quickly.

Description

technical field [0001] The invention relates to the field of axle information identification, in particular to an axle information identification and early warning method and system based on bridge lateral strain. Background technique [0002] Bridges are an essential part of road and rail networks. In recent years, with the continuous development of social economy, vehicle overload has become one of the main reasons for bridge damage and collapse. The repeated driving of overloaded vehicles will seriously damage the safety of the bridge superstructure and accelerate the fatigue damage of the bridge. Especially the old bridges, which account for a large proportion of the built bridges, due to the long history of construction, the strength of the bridge itself has declined, and its resistance has been continuously weakened. Under the action of overloaded vehicles, it will be severely damaged or even collapsed. At the same time, as the cost of bridge maintenance and manageme...

AI Technical Summary

Problems solved by technology

The first type of method, the number of axles, wheelbase and vehicle speed are all necessary data to calculate the axle load; the early bridge dynamic weighing technology needs to install at least two sensors with a certain distance in the middle of the road surface to detect the axle, and then calculate the vehicle speed, It is also used for vehicle classification and axle load calculations, but its main disadvantages are that installation and maintenance interfere with traffic and are not durable

Later, the method of using the strain peak generated by the strain history under the action of the axle to identify the axle was proposed to propose a bridge dynamic weighing technology without an axle detection device, but it could not effectively identify all vehicles.

The introduction of new methods of non-pavement bridge dynamic weighing technology has greatly enhanced the durability of the bridge dynamic weighing technology system. However, the accuracy of bridge strain influence line and axle information seriously affects the test accuracy of bridge dynamic weighing technology. load case, it is more difficult to be accurately identified

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