STATIC AND DYNAMIC STRUCTURAL CHARACTERISTICS AND ECONOMICAL EFFICIENCY OF ULTRA LONG-SPAN CABLE-STAYED SUSPENSION BRIDGES

Abstract

The purpose of this study is to investigate the realizability of ultra long-span cable-stayed suspension bridges, which seem to have more excellent structural characteristics than ordinary suspension bridges by combining the advantage of cable-stayed bridges. In this paper, using trial-design cable-stayed suspension bridges with center span of 2, 500m in which ratios of suspended parts were used as variable, static structural chatacteristics, buckling stability and aerodynamic stability were compared with suspension bridge. Moreover, from all results, the authors discussed about the economical efficiency of ultra long-span cable-stayed suspension bridges.