Deck arch bridge data acquisition system and deformation distribution identification method and equipment

Abstract

The invention discloses a deck arch bridge data acquisition system and deformation distribution identification method and equipment. The data acquisition system includes long gauge length FBG sensors.The sensors are arranged near four division points of an arch ring structure along the length direction of a bridge and the tops and bottoms of arch ring sections near a structural column and two columns. The identification method is based on the data acquisition system, processes acquired sensor data, separates monitored coupling strain data, and finally identifies deformation distribution of the arch bridge by a curvature load method. According to the invention, a sensor arrangement scheme is determined according to strain distribution characteristics of the unit sections and longitudinal unit of the bridge to realize effective distribution monitoring of the arch bridge. Meanwhile, the arch bridge deformation distribution identification method based on curvature change is established through complex stress analysis of the arch bridge, which can effectively and quickly complete a deformation monitoring task of a long-span deck arch bridge, is expected to be applied to engineering practice, and can bring huge economic and social benefits.

Description

technical field [0001] The invention relates to the field of bridge monitoring, in particular to a data acquisition system, a deformation distribution identification method and equipment of an upwardly supported arch bridge, which can realize deformation distribution identification of an upwardly supported arch bridge under complex stress. Background technique [0002] Bridge deflection is an important indicator of bridge safety evaluation. At present, the methods used to measure bridge deflection mainly include direct measurement methods using monitoring equipment such as total stations, GPS, and cable displacement meters, but such methods are greatly affected by factors such as geographical location and climate. Taking GPS technology as an example, although this technology has the advantages of high efficiency, automation, high precision and all-weather operation, it is limited by many factors such as sampling frequency, satellite coverage, environmental conditions and dat...

AI Technical Summary

Problems solved by technology

The deflection and deformation of the arch bridge need to be strictly controlled, but its measurement accuracy will still be affected by various factors during the real bridge monitoring. The existing direct measurement method and indirect measurement method cannot meet the actual deflection measurement requirements of the project.

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