Structural state evaluation method for freight railway simply supported girder bridge

Abstract

The invention discloses a structural state evaluation method for a freight railway simply supported girder bridge. The method comprises: acquiring a real-time load value of a target simply supported girder bridge and a real-time monitoring value corresponding to the real-time load value; obtaining a state evaluation interval ([eta]1,[eta]2), wherein [eta]1 is an optimum state value; calculating astate score based on the state evaluation interval ([eta]1, [eta]2) and a real-time monitoring ratio value [eta]; generating state evaluation information of a target simply supported girder bridge based on the state score. The method uses a proportional coefficient of a measured value and a theoretical value as an index for evaluating whether the simple supported girder bridge structure is intactor not, and can prevent false report when the simple supported girder bridge structure bears high load and is intact in structure, and can also prevent false report when the simple supported girder bridge structure bears low load and is damaged.

Description

technical field [0001] The invention relates to the technical field of engineering monitoring, in particular to a method for evaluating the structural state of a simply supported beam bridge on a freight railway. Background technique [0002] Simply supported girder bridges are an important part of freight railway lines, and their safety status has always been the focus of engineering personnel. In the normal operation process, vehicle-bridge coupling, material aging of simply supported beam bridges, environmental erosion, accidental natural factors, human factors, etc. will all cause damage to the structure of simply supported beam bridges. If the management and maintenance work is not in place, the long-term development It will lead to the occurrence of structural accidents of simply supported beam bridges. [0003] In the existing technology, engineers have proposed a bridge health monitoring system, which can monitor the environmental indicators and status indicators of...

AI Technical Summary

Problems solved by technology

However, the existing monitoring methods evaluate the state of the bridge based on the measured values ​​of the collected bridges. This method will have the following two problems: (1) When the bridge structure is intact, the monitoring data will be abnormal due to the large load. Misreporting occurs; (2) When the bridge structure is damaged, the damage to the bridge structure is underreported due to the small load

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