78 Category 2: Civil Structures 2 Owner Canton of Valais Architect Kurman + Cretton General Contractor ZM - Zwahlen & Mayr SA Engineering Office SD Ingénierie Lausanne SA Construction Period 1985 - 1986 The St-Triphon bridge, which carries 2 traffic roadways and 1 traffic railway across the Rhône river, is an existing bow-string steel arch bridge with a single span of 88 m and a 22 cm post-tensioned concrete slab deck. Canton of Valais ruled a type 2 and type 4 ULS structural analysis verification of the bridge. We have also checked the remaining fatigue life of the bridge using the rain-flow analysis method to calculate the damage accumulation in the hanger connection. A 3D modelling of frames and shell elements was carried out in SCIA Engineer. A global model has been built to calculate strength, stiffness and fatigue of the steel structure. The arch stability was checked using the second-order stability analysis. SCIA Engineer proved to be very flexible with data input. The challenge of the calculation of remaining fatigue life was faced using the load train module. Saint-Triphon Bridge - Saint-Triphon, Switzerland SD Ingénierie Lausanne SA Contact Alessio Salerno Address Place Chauderon 3 1002 Lausanne, Switzerland Website www.sdingenierie.com SD Ingénierie Lausanne SA was founded in 1955 and has about 40 employees. The firm is a diverse engineering, development and management consultancy delivering innovative solutions for public and private clients in Switzerland. Annually we are responsible for more than CHF 1 billion of construction projects. Our structural engineer capabilities cross different sectors: railways, roadways, infrastructures, buildings, hydraulic, environment and sport floors. SD Ingénierie Lausanne SA is engaged in all parts of the design and construction process.
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