Title:
BRIDGE CONDITION EVALUATION METHOD AND CONDITION EVALUATION SYSTEM THEREOF
Document Type and Number:
Japanese Patent JP2021098968
Kind Code:
A
Abstract:
To provide a bridge condition evaluation method capable of precisely evaluating bridge condition while separating vibration components caused by the moving body moving on the bridge and a condition evaluation system thereof.SOLUTION: The condition evaluation method is a method for evaluating the condition of a bridge. In a mode characteristic estimation step, the mode characteristics of the bridge are estimated by separating the vibration component caused by the train from the vibration component of this bridge based on the displacement waveform of the bridge when the train moves on the bridge. In a condition evaluation step, the condition of the bridge is evaluated based on the mode characteristics of the bridge. In the condition evaluation step, the condition of the bridge is evaluated based on the amount Δf of decrease in the natural frequency of the bridge when the train moves on the bridge. In the condition evaluation step, the condition of the bridge is evaluated based on the amount Δξ of increase of the mode attenuation ratio of the bridge when the train moves on the bridge. The state evaluation step evaluates cracks of the bridge.SELECTED DRAWING: Figure 8
Inventors:
MATSUOKA KOTA
Application Number:
JP2019230534A
Publication Date:
July 01, 2021
Filing Date:
December 20, 2019
Export Citation:
Assignee:
RAILWAY TECHNICAL RES INST
International Classes:
E01D22/00; E01D21/00; G01H9/00; G01H13/00
Attorney, Agent or Firm:
Taketo Okuma