Economic Feasibility of Long Span Cable Bridges with Application of High Performance Steel and Wire

摘要

To study an economic feasibility with respect to the application of high-performance steel and highrnstrength wire for long span cable bridges, structural analyses and trial designs were performed.rnIn order to compare trial design with previous real design, the practical cable bridges, which typernare suspension and cable stayed, were selected. Based upon design method and appropriaternassumption, decrease of wire/steel weight and construction cost are evaluated.rnThe results showed that the steel weight and construction cost could be reduced certainly by usingrnhigh performance steel and high strength wire, although the design stresses of some plates in boxrngirder are not governed by material strength due to the stability of stiffened plates and the limitationrnof minimum plate thickness or specification for bridges.