INITIAL IMPERFECTION DATA AND EVALUATION OF COMPRESSIVE STRENGTH OF ORTHOTROPIC STEEL DECK FOR LONG-SPAN CABLE-STAYED BRIDGES

Abstract

Orthotropic steel deck has been often used for long-span bridges because of its light dead weight. The Tatara Bridge, the longest cable-stayed bridge, uses orthotropic steel deck box girder. Orthotropic steel deck used for cable-stayed bridges carries live loads as a bridge deck but is an important structural member consisting main girder to which compressive force due to horizontal component of cable tension acts. In this paper, measurement of initial imperfection on an actual deck was made, then the compressive strength of continuous deck stiffened by trough ribs was analyzed by elasto-plastic finite displacement method thereby the applicability of proposed design method of column-model approach was evaluated.