Bridge bearing capacity evaluation method based on moving load test

Abstract

The invention relates to a bridge bearing capacity evaluation method, and belongs to the technical field of civil engineering application. The method comprises the following steps: firstly, measuringthe dynamic response of a bridge under the action of a moving load through a field test; calculating and extracting an actual influence line of the bridge by adopting a piecewise polynomial function model and a cyclic fitting thought; constructing an influence line evaluation index based on the actual influence line and the theoretical influence line of the bridge; and evaluating the bearing capacity of the bridge by means of the constructed indexes instead of a traditional bridge load test static calibration coefficient. According to the method, the problem of bridge bearing capacity evaluation is solved; a load test method has the defects that the development cost is high, traffic needs to be influenced or interrupted, and time and labor are consumed. The bridge bearing capacity evaluation test process based on the moving load test is simple, the amount of acquired recorded data information is large, and the bridge bearing capacity evaluation test method has great significance in achieving rapidity and economization of bridge bearing capacity evaluation; in addition, the possibility of bridge damage caused by large-scale loading in a static load test can be avoided.

Description

technical field [0001] The invention relates to a bridge bearing capacity evaluation method, belonging to the technical field of civil engineering applications. Background technique [0002] The assessment of bridge bearing capacity is a necessary means to verify structural design, test construction quality and judge the actual bearing capacity of bridges. It plays an important role in preventing bridge accidents and can provide corresponding technical basis for bridge maintenance, reinforcement and reconstruction. [0003] At present, the commonly used bridge evaluation methods in the field of civil engineering are based on visual inspection method and load test method. The visual inspection method requires a detailed visual inspection of the bridge, and is more suitable for evaluating components with simple structures, clear stress and easy observation, such as railings, expansion joints, supports, etc.; the existing scoring standards and evaluation results for complex str...

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