Bridge load limit fast monitoring system based on dynamic deflection

Abstract

The invention discloses a bridge load limit fast monitoring system based on dynamic deflection. The bridge load limit fast monitoring system comprises a bridge dynamic deflection monitoring device used for real-time monitoring of bridge inclination; a vehicle information acquisition device used for monitoring and identifying information related to vehicles passing a bridge; a data processing device used for calculating maximum concave downward deflection values, comparing the maximum concave downward deflection values with a bridge safety design deflection allowable value, and sending alarming information at the same time; an over-limit information alarming device used for displaying the information related to the over-limit vehicles according to the alarming information; a data remote transmitting device used for transmitting data related to the over-limit vehicles; and a data remote receiving device used for receiving the information related to the over-limit vehicles, and storing the data. The bridge load limit fast monitoring system is advantageous in that fast installation is realized without requiring blocking of traffic; the actual bearing capability of the bridge is not required to be detected and evaluated in advance; the bridge load limit fast monitoring system is used for load limit monitoring of old highway bridges or damaged highway bridges in meizoseismal areas, and occurrence of bridge collapse accidents is reduced.

Description

technical field [0001] The present invention relates to a monitoring system, in particular to a fast monitoring system for bridge load limit based on dynamic deflection, which is used to identify whether the overall equivalent weight of trucks driving across the bridge exceeds the actual safe bearing range of the bridge, so that the old bridge Or damaged bridges in strong earthquake areas are subject to load limit monitoring. Background technique [0002] Bridge load limit monitoring is an important means to ensure the safe use of old bridges or damaged bridges after strong earthquakes. Existing monitoring methods are mainly based on dynamic weighing technology to achieve bridge load limitation. The principle is to estimate the weight of the vehicle at rest by measuring the front and rear tire pressures of the moving vehicle. The dynamic bearing system generally includes a series of pressure sensors and data acquisition and analysis devices. At present, the pressure sensor...

AI Technical Summary

Problems solved by technology

Quartz resonant and piezoresistive bent-plate sensors are traditional pressure sensors. The technology is mature, but there are disadvantages such as high price and slow dynamic response, which are greatly restricted in the application of modern expressway dynamic weighing systems.

Piezoelectric film sensors have shown outstanding advantages and occupy a large market application. Unfortunately, they still have relatively expensive prices, low accuracy, high requirements for on-site construction, large sensor temperature drift, and lateral force. Disadvantages such as large sensor impact

[0003] The advantage of dynamic weighing technology is that the weighing process does not affect the normal driving of the vehicle, but there are also obvious disadvantages. Specifically, the sensors need to be covered under each lane, which is troublesome to install and debug, especially for bridges that have already been in service.

In addition, the method of bridge load limitation based on dynamic weighing technology only judges whether the passing truck is overloaded based on a single load allowable value, so it is necessary to accurately evaluate the actual bearing capacity of the old bridge or the bridge with damage, and does not consider the location of the truck. Damage caused by proper and improper speed

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