Method for recognizing moving vehicle load on bridge based on generalized minimal residual algorithm

Abstract

The invention discloses a method for recognizing a moving vehicle load on a bridge based on the generalized minimal residual algorithm. The method comprises the steps of 1, arranging photoelectric sensors, strain gauges and accelerometers at predetermined measuring point positions on a bridge floor; 2, establishing a simplified physical mechanical model of the bridge; 3, solving the term q[n](t) by means of convolution integral in a time domain to obtain a system function Af=b, wherein A represents a known system matrix, b represents a known bridge floor response, and f represents the desired moving vehicle load; 4, assigning an initial value f[0] to the desired moving vehicle load f to obtain an initial residue r[0]=b-Af[0]; 5, obtaining the moving load by means of the generalized minimal residual algorithm. According to the method, recognition precision is much higher than that of an ordinary moving load recognizing method, and the method is especially suitable for high-precision moving load recognition.

Description

technical field [0001] The invention relates to the technical field of bridge deck moving load identification, in particular to a dynamic identification method for bridge deck moving vehicle loads based on a generalized minimum residual method. Background technique [0002] At present, the vehicle load is the most influential live load of the bridge in service. The dynamic vehicle load will cause additional stress on the road surface and the bridge, cause the cumulative damage and fatigue damage of the bridge, and even induce the vicious accident of the bridge structure. With the development of lighter bridges, heavier vehicle loads, and higher vehicle speeds, the accurate identification of moving loads has attracted more and more attention from bridge engineering researchers. At present, the deployment of sensors can record the dynamic response of the bridge under the excitation load of the vehicle, and based on the dynamic response of the bridge, it can identify the moving...

AI Technical Summary

Problems solved by technology

The State Council and the Ministry of Communications have successively promulgated the relevant regulations and regulations on the management of highways and over-limit transportation in my country. However, in order to seek greater profits, some transportation companies violated the national regulations on the rated size and load of vehicles to carry out over-limit and overload transportation, causing serious damage. damage roads and other transportation infrastructure, and threaten driving safety

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