A method for evaluating the bearing capacity of bridges based on moving load tests

Abstract

The invention relates to a bridge bearing capacity evaluation method, which belongs to the technical field of civil engineering applications. The method of the present invention first measures the dynamic response of the bridge under the action of the moving load through field tests; then calculates and extracts the actual influence line of the bridge by adopting the piecewise polynomial function model and the train of thought of loop fitting; based on the actual influence line of the bridge and the theoretical influence The influence line evaluation index is constructed; and the constructed index is used to replace the traditional bridge load test static calibration coefficient to evaluate the bridge bearing capacity. The present invention solves the deficiencies of the bridge carrying capacity evaluation-load test method, such as high cost of development, need to affect or interrupt traffic, time-consuming and labor-consuming, etc.; the test process of the bridge carrying capacity evaluation based on the moving load test in the present invention is simple and obtains records The amount of data information is large, which is of great significance to the rapid and economical evaluation of the bridge bearing capacity; not only that, the present invention can also avoid the possibility of bridge damage caused by a large amount of loading in the static load test.

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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Problems solved by technology

Still adopting traditional detection methods will bring huge detection and evaluation workload, time and economic consumption

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