Intelligent axial force loading system employing distributed optical fiber measurement device

Abstract

The invention discloses an intelligent axial force loading system employing a distributed optical fiber measurement device. The intelligent axial force loading system comprises distributed optical fiber sensors, high-strength prestressed thread steel bars, hydraulic loading devices, a loading cross beam, a counter-force floor and a control system, wherein the distributed optical fiber sensors penetrate centers of the high-strength prestressed thread steel bars; the high-strength prestressed thread steel bars are anchored between the loading cross beam and the counter-force floor by nuts and high-strength gaskets; each hydraulic loading device is arranged between the corresponding high-strength gasket and the loading cross beam; the distributed optical fiber sensors are connected with an optical fiber modulation-demodulation module, a data analysis module, a control module and a hydraulic loading device, and a structural test piece is arranged between the loading cross beam and the counter-force floor; the control system controls the hydraulic loading devices to apply axial pressure to the structural test piece by means of axial tension of the high-strength prestressed thread steelbars. The intelligent axial force loading system is reasonable in structure, has a clear stress path and has advantages of high measurement precision, good linearity, quite high resistance to electromagnetic interference, good corrosion resistance and the like.

Description

technical field [0001] The invention relates to the field of structural testing, in particular to an intelligent axial force loading system utilizing a distributed optical fiber measuring device. Background technique [0002] In structural engineering, the axial compression ratio of structural components (such as columns, shear walls, etc.) is a key technical indicator, which is of great significance to structural design. The axial compression ratio of structural components has an important impact on the seismic capacity of structures, and A key technical parameter affecting the axial compression ratio of structural members is the axial pressure. At present, in the field of structural testing, the application of axial pressure on structural specimens is usually carried out through the reaction force rigid frame, using hydraulic jacks for loading, and the monitoring of loading axial pressure is usually performed between structural specimens and hydraulic jacks, or reaction fo...

AI Technical Summary

Problems solved by technology

However, due to the large volume, heavy weight and low sensitivity of the actual pressure sensor, it is difficult to install during the actual test process, the measurement of the axial force is not accurate, and the control of the axial pressure is unstable, which affects the test results and even affects the structural design.

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