Author:
Ali Khawaja,Saleem Aleena
Abstract
Cable-stayed and extradosed bridges are thought to be identical structures because both bridges use stay cables for reinforcement. However, the safety factors of their stay cables are stipulated differently in many international standards, i.e., Japanese specifications suggest the safety factors of 2.5 and 1.67 for the design of cable-stayed and extradosed bridges, respectively. In this chapter, a parametric study is carried out for the evaluation of safety factors of stay cables by employing the deterministic and nondeterministic methods at limit states. As a result, it is found that the safety factors in the range of 2.3–2.5 and 1.67 are indispensable for the safe design of cable-stayed and extradosed bridges, respectively, to satisfy the conditions of limit states and target reliability index.
Reference14 articles.
1. Collings D, Gonzalez AS. Extradosed and cable-stayed bridges, exploring the boundaries. Proceedings of the Institution of Civil Engineers—Bridge Engineering. 2013;166(4):231-239
2. Prestressed Concrete Technical Institute. Extradosed Bridge Design and Construction Standard. Japan: Gihodo Shuppan; 2009
3. Ali K, Katsuchi H, Yamada H. Parametric study on cable safety of cable-stayed bridge considering ultimate and fatigue limit states. Journal of Structural Engineering, JSCE. 2018;64(A):99-108
4. Japan Road Association. Japanese Specifications for Highway Bridges. Japan; 2002
5. Elishakoff I. Safety factors and reliability: Deterministic actual stress & random yield stress. Safety Factors and Reliability, Friends or Foes. 2004:75-96. Available from: https://doi.org/10.1007/978-1-4020-2131-2_4