Bridge bearing capacity evaluation method based on field tested influence line

Abstract

The invention discloses a bridge bearing capacity evaluation method based on a field tested influence line. The method is composed of such basic methods as a direct calculation evaluation method, a comparison evaluation method, a finite element model modification evaluation method and the like and mainly comprises the following steps: testing the field tested influence line of a bridge structure if the bearing capacity of the bridge structure can not be obtained by the conventional calculation evaluation method; then on the basis of actually measuring the field tested influence line, evaluating the bridge bearing capacity by the three basic evaluation methods of the method; and further evaluating the bridge bearing capacity with the help of such evaluation methods as load test if the evaluation conclusions can not be made by the three basic evaluation methods. The method has the following advantages: the existing bridge bearing capacity evaluation system is supplemented and perfected; and the method is mainly applied to general survey of the technical conditions of the bridges and evaluation of the bearing capacities of the conventional bridges and can also be applied to evaluation of the bearing capacities of special-shaped bridges, bridges for overweight vehicles to pass temporarily and dangerous bridges.

Description

technical field [0001] The invention relates to the field of bridge engineering, in particular to a bridge bearing capacity evaluation method based on quasi-static generalized influence lines. Background technique [0002] The existing bridge structural bearing capacity evaluation technology mainly uses the structural inspection method based on the current situation inspection (abbreviation: conventional inspection calculation) to evaluate the bridge structural bearing capacity. The conventional inspection method is first based on the inspection results of the bridge structure or components, and obtain Structural geometric parameters, reduction coefficients and other specific values, and then carry out structural inspection and calculation of the bridge based on technical data such as design drawings, as-built drawings, and current inspection results, and finally evaluate the bridge's bearing capacity based on the current inspection results and inspection results. When the c...

AI Technical Summary

Problems solved by technology

However, the load test method needs a long time to interrupt or close the traffic, which affects the smooth operation of traffic; at the same time, the current evaluation code cannot accurately evaluate the bearing capacity of dangerous bridges and special-shaped bridges, nor can it provide safety for bridges temporarily passing overweight vehicles. assessment

The patent "A Quick Load Test Method for Bridge Bearing Capacity" (ZL 200910030761.0) invented by Zhang Yufeng of Jiangsu Academy of Transportation Sciences only provides that the load distribution on the model after the correction of the influence line is carried out according to the requirements of the load test, and the deflection is calculated. The efficiency coefficient of the bridge structure does not give specific methods and steps on how to evaluate the bearing capacity of the bridge structure

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