Study On OHM15-3 Prestressed Anchorage Tension Based On Recognition

Prestressed anchorage structure because of its high strength and good relaxation properties and is widely used in the field of bridge, rock soil anchoring, slope protection, engineering, its main function is can improve the structure rigidity, bearing capacity and stability. In recent years, due to the loss of prestressed anchor structure,the engineering accidents caused great harm to people’s life and national property.. Therefore, an effective detection method is proposed, and the main problems of the failure of the prestressed failure are solved by setting the appropriate technical specification.. The research results are as follows:1. In this paper, according to the principle of prestressed anchorage structure system vibration, system is simplified as a single degree of freedom spring system depending on the anchor, bolt as a generalized mass m, anchorage and contact surface of the anchor plate is regarded as spring cut to the stiffness K, grading of anchor applied vertical tension, at the same time, each level vertical to the load of anchorage applied cut to load to obtain the horizontal displacement of anchorage and verify cut to load and horizontal displacement is associated.2, based on tangent to stiffness K and normal force F, there exists a corresponding relation between, on the anchorage applied horizontal excitation f(T), using acceleration sensor to obtain the vibration acceleration signal and integral velocity and displacement signals. Based on the principle of the least squares method to identify the system stiffness of MATLAB software programming calculation and obtain k-F calibration curve.3, using micrometer to gather the high frequency dynamic displacement signal,acquisition of signal and information processing analysis, it is proved that the anchorage vibration signal waveform generated by vibration wave signal and non elastic wave.4, the calibration curve of k-F and Realization on construction site of prestressed anchorage structure of effective stress of large measuring range, to solve the problem of loss of prestressed anchorage structure, the detection method for the future of prestressed detection technology development has engineering value.