Method for evaluating longitudinal shock resistance of highway bridge support and stretching device

Abstract

The invention is suitable for the field of highway bridge detection. If a bridge support or a stretching device is damaged, under the excitation action of dynamic loads, the stretching device or a beam body can generate longitudinal shock vibrations. The invention discloses a method for evaluating the longitudinal shock resistance of a highway bridge support and a stretching device quickly. According to the method, a vibration data acquisition module for acquiring a longitudinal acceleration response signal of an object to be evaluated, a longitudinal shock resistance evaluation model which defines calculating and grading methods of the longitudinal shock resistance and the shock resistance deterioration rate, and a deterioration process database for storing the evaluation results of the longitudinal shock resistance and the shock resistance deterioration rate in all detection periods, tracking and monitoring the change of the shock resistance deterioration rate, and diagnosing and identifying the early deterioration and damage of the shock resistance are included. According to the method, the detection efficiency is improved, and the reliability of checking and evaluation is improved.

Description

technical field [0001] The invention belongs to the field of highway bridge detection and relates to the service performance detection of a highway bridge support and a telescopic device. Background technique [0002] Highway bridge bearings and telescopic devices are important structures in highway bridges, and maintenance departments are usually required to conduct periodic inspections on them, and evaluate their technical conditions based on the inspection results. [0003] Under operating conditions, with the extension of the service period, highway bridges inevitably have some deterioration or disease. The deterioration of the expansion device is mainly manifested in the relative dislocation of the expansion joints; under the coupled excitation of the dislocation expansion joints and the driving, it can cause the vibration response of the driving and the beam body. ; If the misalignment is too large, it will not only affect the driving safety but also affect the safety ...

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Problems solved by technology

[0003] Under operating conditions, with the extension of the service period, highway bridges inevitably have some deterioration or disease. The deterioration of the expansion device is mainly manifested in the relative dislocation of the expansion joints; under the coupled excitation of the dislocation expansion joints and the driving, it can cause the vibration response of the driving and the beam body. ; If the misalignment is too large, it will not only affect the driving safety but also affect the safety and durability of the bridge structure

[0004] For a long time, the regular inspection of highway bridge bearings and telescopic devices mainly adopts the method of manual inspection, which has the following problems: 1. There are more qualitative inspection contents and less quantitative inspection contents in the inspection content; Small working space; 3. Low inspection efficiency and unstable inspection quality, low detection rate of early disease

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