Jongho Park

Analysis of expressway bridge deck slab deterioration

In this study, the deterioration factors that affect the damage on the bridge deck slab wrapped with existing asphalt were estimated and analyzed to identify the final deterioration factors and a damage rate estimation equation was proposed that would predict the extent of damage on the bridge deck slab. Information on a total of 1219 bridges nationwide scale was collected through the GPR system, eight deterioration factors were derived, including number of days of de-icing chemical, de-icing chemical usage, the daily de-icing chemical usage, de-icing chemical usage compared with standard, snowfall, number of snowy days, the altitude, and the number of freeze-thaw days. In addition, through a correlation analysis between the respective deterioration factors and the damage rate of the bridge deck slab, the upper and lower lines were derived. The estimation equation of the damage rate on the bridge deck slab as suggested by this study can be used as a basic data for performing repair and reinforcement at an appropriate time by estimating the damages on the bridge deck slab, accordingly, it is expected to provide priority for repair and reinforcement work, and to carry out effective bridge maintenance as an appropriate amount of budget can be doubled.In this study, the deterioration factors that affect the damage on the bridge deck slab wrapped with existing asphalt were estimated and analyzed to identify the final deterioration factors and a damage rate estimation equation was proposed that would predict the extent of damage on the bridge deck slab. Information on a total of 1219 bridges nationwide scale was collected through the GPR system, eight deterioration factors were derived, including number of days of de-icing chemical, de-icing chemical usage, the daily de-icing chemical usage, de-icing chemical usage compared with standard, snowfall, number of snowy days, the altitude, and the number of freeze-thaw days. In addition, through a correlation analysis between the respective deterioration factors and the damage rate of the bridge deck slab, the upper and lower lines were derived. The estimation equation of the damage rate on the bridge deck slab as suggested by this study can be used as a basic data for performing repair and reinforcement at an...

New Priority Ranking Algorithm for the Deteriorated Coastal Bridges Considering Network Level

ABSTRACT Park, J.; Park, S.-K.; Choi, J., and Hong S., 2017. New priority ranking algorithm for the deteriorated coastal bridges considering network level. In: Lee, J.L.; Griffiths, T.; Lotan, A.; Suh, K.-S., and Lee, J. (eds.), The 2nd International Water Safety Symposium. Journal of Coastal Research, Special Issue No. 79, pp. 129–133. Coconut Creek (Florida), ISSN 0749-0208. Bridges are currently constructed and designed considering the structural safety required by the design code. However, coastal bridges are continuously deteriorated by many causes such as concrete spalling and exfoliation due to aging, faulty construction, and other deterioration factors. In this study, a prior ranking algorithm is investigated for performing maintenance management of coastal bridges and composed of more reasonable algorithm with studied on previous precedence priority ranking algorithm to realize bridge maintenance. With regard to a rating index of a total of 100 points, appearance defect index and load capacity deficiency was suggested with 40 and 60 point respectively. It is a more reasonable prior ranking algorithm that reflects the load capacity function, traffic of bridges and deteriorated bridge with high degree of deficiency point.