| Title |
Spectra of Road Surface Roughness on Bridges of Minor Road |
| Authors |
정태주(Chung, Tae Ju) ; 차봉기(Cha, Bong Ki) |
| DOI |
https://doi.org/10.12652/Ksce.2016.36.5.0757 |
| Keywords |
노면조도;파워스펙트럼밀도;최대엔트로피법;국제평탄성지수 Road surface roughness;PSD;MEM;IRI |
| Abstract |
The power spectral density (PSD) for the road surface roughness on the bridges of minor roads in Wonju city and Hoengseong-gun, Gangwon-do is presented. To obtain the PSD, the road surface roughness on 18 different bridges with various superstructure type and span is measured by GPS at every 10 to 30cm interval. Assuming the PSD as the stationary normal probability process with zero mean value, the PSD of measured road surface roughness is obtained by applying the Maximum Entropy Method (MEM). A simple formula in evaluating the PSD of RC slab bridge, Rahmen bridge and PSC I-girder bridge which is applicable to the dynamic response analysis of bridges considering the road surface roughness is proposed. Using the calculated PSD curves, the road surface conditions on the 18 bridges are evaluated. The statistical relationship between the PSD and the IRI is presented by applying linear regression and correlation analysis. |