Abstract
This paper presents results of an investigation of evaluating the bridges health index for maintaining more effectively by using general statistical analysis of bridge inspection data. In this study, the first principle component of principle component analysis using a lot of inspection item results on each member is defined as bridge health index (BHI). The special feature in BHI is to be continuous quantify in order not to lose the amount of information contain in the discrete many inspection results. In addition, the bridges seem to be stratified into 4 categories considering deterioration mechanisms using the information obtained from second principle component. For this reason, the result in this study showed to be the effective information for repair and maintenance plan of bridges.
