Analysis of Human Comfort on Long-Span Glass Pedestrian Suspension Bridge under Human-Induced Vibrations and Vibration Mitigation Design
This study investigates the human comfort on the long-span glass pedestrian suspension bridge under human-induced vibrations.An existing glass pedestrian suspension bridge with a main span of 180 m is used as a case.The modal analysis of the bridge was carried out in MIDAS Civil,based on which the sensitive modes of the bridge under human-induced loads was obtained,the dynamic responses of each sensitive mode of the bridge under human-induced loads were calculated,and the comfort level was evaluated referencing the comfort ratings in the German Pedestrian Bridge Design Guideline EN03.It was determined to add multiple tuned mass dampers(MTMDs)to the bridge for vibration mitigation.As per the analysis,a total of 17 modes of vibrations are within the sensitive frequency ranges of human-induced vibrations,and the sensitive frequency ranges of transverse and vertical vibrations of the structure are within 0.5-1.2 Hz and 1.25-2.30 Hz,respectively.Under human-induced loads,the vibrations of the 13th,39th and 52nd modes exceed the CL4 comfort level,the vibrations of the 5th and 24th modes exceed the CL3 comfort level.After equipped with MTMDs,the human-induced vibrations of all the sensitive modes of the pedestrian bridge reach the CL2 comfort level.
万方数据
维普
