A method for identification of moving vehicle loads on bridges based on generalized minimum residual method

Abstract

The invention discloses a load identification method for bridge moving vehicles based on the generalized minimum residual method. (1) Arranging photoelectric sensors, strain gauges and accelerometers at the preset measuring points on the bridge deck; (2) Building bridges Simplify the physical mechanics model, (3), solve in the time domain by convolution integration, obtain the system equation of the form such as, then be the known system matrix, be the known bridge deck response, be the moving vehicle load that seeks; (4) Give an initial value to the mobile vehicle to obtain the initial residual; (5) Use the generalized minimum residual method to obtain the mobile load. Compared with common mobile load identification methods, the identification accuracy of the invention is greatly improved, and is especially suitable for high-precision mobile load identification.

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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