Bridge random load test safety assessment method and system and storable medium

Abstract

The invention discloses a bridge random load test safety assessment method and system and a storable medium, and relates to the technical field of bridge engineering, and the method comprises the steps: building a bridge random load test through the space-time matching of a bridge floor traffic flow load and a structure monitoring response, and further obtaining an effective random load test from the bridge random load test; calculating a plurality of different evaluation indexes according to the random load test working condition, and determining the plurality of evaluation indexes to divide the bridge safety state into different value intervals; according to the calculation results of the plurality of evaluation indexes under the random load test working condition, respectively forming corresponding evaluation conclusions for the bridge safety state; and fusing a plurality of evaluation conclusions by adopting a decision fusion method based on a D-S evidence theory to form a final evaluation grade of the bridge safety state. According to the invention, bridge load test detection and evaluation can be carried out by directly using the operation traffic flow under the condition of not closing traffic, and the problems of traffic closing, low implementation frequency and the like of a traditional load test are solved.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, and more particularly to a safety evaluation method, system and storage medium of a bridge random load test. Background technique [0002] Nowadays, highway bridges with hidden safety hazards have gradually become a fatal defect in the transportation network. It is a very basic and urgent need to conduct timely and accurate state assessment of bridges in service. At present, load testing and structural health monitoring are the two main means of bridge condition assessment. [0003] Load test testing the "output characteristics (mechanical response of control parts)" of bridge structures under the action of "determined input (standardized vehicle load)" is generally considered to be the most direct and effective means of evaluating bridge status and bearing capacity. However, load testing requires closed traffic, a specific type and number of trucks, a dedicated loading scheme, and a ...

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Problems solved by technology

[0006] Therefore, how to directly use the operating traffic flow to carry out load test detection and safety assessment on the bridge under the condition of not closing the traffic, and overcome the shortcomings of traditional load tests such as closed traffic, low implementation frequency, and high economic cost are technologies that need to be solved urgently by those skilled in the art. question

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