Hidden danger risk early warning method for freight vehicles passing through single-column pier bridge

Abstract

The invention relates to a hidden danger risk early warning method for a freight vehicle passing through a single-column pier bridge. The hidden danger risk early warning method comprises the following steps of S1, establishing a hidden danger risk analysis fault tree model; S2, converting the hidden danger risk analysis fault tree model into a Bayesian network model, performing quantitative risk analysis based on the converted Bayesian network model, and calculating a risk hidden danger posterior probability; and S3, establishing a hidden danger risk standard matrix and establishing a multi-level risk early warning system; Through combination of a fault tree model (FTA) and a Bayesian network model (DBN), a hidden danger risk quantitative analysis model for a single-column pier bridge to pass through an overweight and overload freight vehicle is constructed, and a risk standard matrix, a risk early warning threshold grade division standard and corresponding risk control measures are determined.

Description

technical field [0001] The invention relates to the field of structural quantitative risk control and safety early warning of single-pillar pier bridges in operation, and in particular to a risk early warning method for over-limit and overloading hidden dangers of freight vehicles passing through single-pillar pier bridges. Background technique [0002] In recent years, there have been major bridge safety accidents such as the overturning and collapse of single-pillar bridges in many places in my country, which have caused great harm to people's lives and property, and caused great losses to the social economy. The occurrence of this kind of accident is related to many factors, but the direct cause of the accident is that the overweight and overloaded freight vehicles (convoy) illegally drive on the bridge, exceeding the load limit of the bridge, resulting in the instability of the bridge structure, causing the upper structure of the bridge to overturn, rollover or structura...

AI Technical Summary

Problems solved by technology

[0016] At present, although there are many patent documents related to the above-mentioned "bridge", "overrun" and "overload", there are not many related algorithms and models related to risk warning, and most of them are designed and monitored by the monitoring system for overshooting. Recognition algorithm, related research also lacks breakthroughs and innovations in key technologies and key calculation algorithms. Existing technical solutions have the following deficiencies: no corresponding early warning modes are adopted for different bridge structures. Although bridges have similar functions in use, they are different Different bridge structures have different stress forms, and the requirements for vehicle loads on the road are also different.

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