Improvement of accuracy for the evaluation of corrosion environment on steel bridges using WRF technique

Abstract

Accurate evaluation of the corrosion environment of steel bridges for corrosion prevention is important. In the past, an evaluation method of dew condensation due to temperature and relative humidity was developed using a weather research and forecasting (WRF) numerical weather prediction technique. In this study, accuracy enhancement of WRF for corrosion environment evaluation is discussed to obtain accurate results. In Japan, WRF used United States Geological Survey-based land - use data, gave inaccurate results to a certain extent. In this paper, the land use data provided by the Geospatial Information Authority of Japan is used to improve the accuracy of the WRF model. Additionally, a temperature modification factor is proposed to obtain the actual girder temperature from the atmospheric temperature.