Evaluation method for vertical shock resistance service performance of highway bridge bearings and expansion devices

Abstract

The invention is applicable to the field of highway and bridge detection. If the bridge support or the telescopic device is damaged, under the excitation of dynamic load, the vertical impact vibration of the telescopic device or the beam body can be caused. The invention discloses a quick evaluation method for vertical shock resistance service performance of highway bridge bearings and expansion devices. The method includes: a vibration data acquisition module for collecting vertical acceleration response signals of the evaluated Impact performance evaluation model, which defines the calculation and classification methods of vertical impact resistance performance and impact resistance degradation rate; deterioration history database, stores the evaluation results of vertical impact resistance performance and impact resistance degradation rate of each test cycle, and tracks and monitors impact resistance degradation rate The changes in the early degradation of service performance can be diagnosed and identified. The method of the invention improves the reliability of inspection and evaluation while improving the detection efficiency.

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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