Test method for natural vibration characteristics of bridge station structure based on grouped spring oscillators

Abstract

The invention provides a method for testing the natural vibration characteristics of a bridge station structure based on a group of spring vibrators, which can intuitively and simply monitor the natural vibration characteristics of any part of the structure, and then obtain the overall natural vibration frequency of the bridge station. The method for testing the natural vibration characteristics of the bridge station structure provided by the present invention is characterized in that it includes: step 1. arranging groups of spring vibrators with different natural frequencies on the measuring points of different structural parts of the bridge station; step 2. After the train leaves the bridge station, the structure of the bridge station vibrates freely, and the groups of spring vibrators are forced to vibrate under the influence of the natural vibration of the bridge station. The vibration of each spring vibrator is accurately captured by a high-speed camera; step 3. According to the obtained According to the vibration condition of each spring vibrator, the forced vibration frequency of the spring vibrator group is calculated, and the forced vibration frequency is the natural frequency at the corresponding measuring point; step 4. According to the natural frequency of each measuring point, the bridge station is obtained The natural frequency of the overall structure.

Description

Technical field [0001] The present invention belongs to the field of structural safety monitoring, specifically relates to a self-vibration characteristic test method of the bridge station structure based on a group of spring oscillators. Background [0002] With the rollout of large-scale infrastructure construction in the country, different cities have begun to carry out the construction of high-speed rail stations, railway stations, subway stations, station structure forms are diverse, bridge station structure forms with its various advantages have been used on a large scale, so monitoring the self-vibration characteristics of the bridge station structure is crucial, directly related to the power response of the bridge station, structural safety and the comfort of the crowd in the station. [0003] At present, the vibration frequency monitoring equipment relies on electronic equipment, needs to carry complex electronic sensors, bulky and has high requirements for power supply...

AI Technical Summary

Problems solved by technology

[0003] At present, vibration frequency monitoring equipment mostly relies on electronic equipment, which needs to carry complex electronic sensors, which are bulky and have high requirements for power supply and strict environmental conditions, and the acquisition of frequency is not intuitive enough, so it cannot Make adjustments now

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