Open AccessSupporting Condition Evaluation Method of Cable-Stayed Bridges Based on Modal Assurance Criterion
Author(s) -
Yaozong Ma,
Qian Zou,
Longlin Wang
Publication year - 2021
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/719/3/032059
Subject(s) - modal , mode (computer interface) , structural engineering , modal analysis , computer science , acoustics , engineering , materials science , finite element method , physics , composite material , operating system
In order to identify the supporting condition of cable-stayed bridges with semi-floating system by using the measured mode shapes, this paper proposed an actual supporting condition evaluation method of cable-stayed bridges based on the indicator of modal assurance criterion (MAC). Firstly, the measured mode shapes and theoretical mode shapes under different supporting conditions could be obtained. Then the corresponding MAC indicator values were calculated, which would be compared to evaluate the supporting condition of bridges. The experiment results revealed that the MAC values between the measured mode shapes and theoretical mode shapes were in good agreement with MAC values above 0.9, which indicated that the actual structural support condition was consistent with the theoretical calculation condition. The experimental results of actual bridges proved that the proposed method in this paper is feasible and effectiveness.