Investigation of mechanics of a masonry arch bridge by distinct element method

Abstract

Nishida bridge, an arch stone structure of four spans, that crosses Kotsuki river in Kagashima city, was built 150 years ago and has been busy with automotive traffics in the past. At present, the bridge is being transferred to another place. Distinct element methods although originally used to model jointed rock masses, can also be applied to the analysis of masonry structures composed of stones. In this paper, a study of mechanics, namely, present stress states, carrying capability and stability of Nishida bridge is presented using distinct elements. During the analysis, Nishida bridge was dismantled theoretically in stages, and the above mechanics were studied.