Non-linear behavior of innovative steel cable-stayed bridge stiffening girder

Until these days there are three very well-known structural forms in cable-stayed bridge construction: radial, harp and fan. These three well-known and analyzed systems ensure the stability of the cable-stayed bridges in a variety of conditions. In order to reduce the amount of materials various solutions are used. One way to reduce the cost of steel may be a new, innovative structural form. A new cable-stayed bridge structure, which requires smaller quantities of materials, is proposed in this Paper. New structural form is compared with traditional cable-stayed structures and the conclusions, which reflect the advantages of this construction, are presented. Result of the analysis is evaluation of innovative cable-stayed structure bending moments, axial forces, deflections and non-linear behavior compared with traditional cable-stayed structure under the influence of both symmetric as asymmetric loads. Technical-economical assessment is also proposed in the Paper. The Paper gives an overview of the differences between traditional and innovative design of cable-stayed bridges.