Bridge field static load test evaluation method

Abstract

The present invention relates to a bridge field static load test evaluation method, which is mainly a method for evaluating the bearing capacity and adaptation performance of a bridge by means of a field static load test. The method comprises the following steps: (1) determining specific content and method for collecting relevant data for early stage preparation work; (2) establishing a reasonable and accurate bridge structure finite element model according to the collected data; (3) calculating and analyzing a result according to an endogenous force and a stress of the bridge under dead and live loads, and determining theoretical force bearing safety and live load force bearing characteristics; (4) in combination with a traditional key section of the bridge, determining a bridge test section and completing static load test solution designing; (5) performing the field static test for the bridge and processing the test data; (6) studying an evaluation interval corresponding to a preset test evaluation indicator; and (7) making a reasonable and comprehensive assessment on the structural performance of the bridge. The evaluation method and indicator according to the present invention can more effectively indicate the practical bearing capacity and applicability of the bridge in a refined manner, and improving the reasonability and accuracy of the evaluation result.

Description

technical field [0001] The invention relates to the field of bridge bearing capacity tests, in particular to an evaluation method for bridge static load tests on site. Background technique [0002] At present, the number of diseased bridges on various traffic lines is huge, and the task of bridge inspection and evaluation is becoming increasingly heavy. At present, the management and maintenance status of existing bridges is worrying, and sudden collapse accidents of bridges in operation at home and abroad continue to occur. On July 14, 2011, the bridge deck at the northern end of the Wuyishan Gongguan Bridge in Fujian suddenly broke and collapsed; on July 15, 2011, part of the bridge deck on the approach bridge of the Third Qianjiang Bridge suddenly collapsed; on August 1, 2007, a bridge in Minnesota, USA collapsed and many more. Once a collapse accident occurs during operation, it will cause huge property damage, and may lead to casualties and line blockage, as well as b...

AI Technical Summary

Problems solved by technology

[0006] In order to overcome the deficiencies of the existing bridge static load test evaluation methods, a new bridge static load test evaluation method is proposed. According to the calculation analysis and test data, three evaluation indicators and their evaluation limit system are constructed to overcome the existing evaluation methods. Technical issues with unreasonable and incomplete assessments and limited assessment conclusions

To overcome the technical problem that the current static load test of bridges cannot reasonably evaluate the bearing capacity and applicable performance of bridges

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