Design Cable-stayed Bridge for Cost Effectiveness and Safety

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by Jih-Jiang Chyu,

Document Type: Proceeding Paper

Part of: Engineering Mechanics:

Abstract: Innovative design approach is needed to enhance the prestigious status enjoyed by cable-stayed bridges. The present paper aims at such a goal of cost effectiveness and safety by providing design guidelines which are based on a study comprising finite element modelling (FEM), an assessment of results from FEM, influence surface method, and an elastic plate analysis. The main results are: (1) Cable and deck stiffnesses affect moments, deformations, with region of influence being a square. (2) FEM yields results enabling cost effective design. (3) Stresses in deck near cable depend sensitively on cable and deck stiffnesses. (4) Load effects on cables are evaluated. Many features in this work can be used to deal with effects of wind, earthquake loads. Consequently, future extension of the present work can proceed, at least, in these directions.

Subject Headings: Cables | Finite element method | Cable stayed bridges | Bridge design | Decks | Stiffening | Safety | Plastic design |

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