Bridge effective prestress force on-way distribution and attenuation testing device

Abstract

The invention relates to a bridge effective prestress force on-way distribution and attenuation testing device comprising a data collector, a monitoring computer and an intelligent steel strand arranged in a bridge; the intelligent steel strand is formed by twisting a central filament and peripheral wires wound around the central wire, the central filament is a carbon fiber filament, an optical fiber provided with optical fiber grating sensors is arranged in the central filament, leading-out wires of the optical fiber grating sensors in the intelligent steel strand are connected to the data collector via an optical cable, the data collector communicates with the monitoring computer, collected prestress force of all points is transmitted to the monitoring computer which is used for receiving the prestress force of all the points, and therefore distribution conditions and attenuation conditions of effective prestress force of the bridge can be subjected to statistical analysis operation. The optical fiber grating sensors are distributed on prestress force ribs according to monitoring requirements, magnitude of effective prestress force of all points can be displayed, the distribution conditions of the effective prestress force can be rapidly and accurately reflected, and the attenuation conditions of effective prestress force can be tested over time.

Description

technical field [0001] The invention relates to the field of special equipment for construction, management and maintenance of prestressed bridges, in particular to a device for testing the distribution of effective prestress along the bridge and its attenuation. Background technique [0002] The distribution of effective prestress and its attenuation along the bridge have always been a major problem in the field of civil engineering that needs to be known urgently but cannot be tested. At present, the bridge industry adopts the pipeline friction test method, which is based on the mechanical variation of the two ends of the beam body to test and analyze. The distribution law along the way is unknown. The distribution of prestress along the way calculated based on this is one-sided or even wrong. of. And it is only limited to the construction, and there is nothing to do after the bridge is completed. As for the attenuation of effective prestress, it can only rely on buried ...

AI Technical Summary

Problems solved by technology

The accuracy is low due to the deviation from the calibration conditions on site, and the sensor changes with temperature, humidity, and time, so it needs to be calibrated every year, which leads to very poor practical value.

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