SCIA User Contest 2017 Online Book

39 Category 1: Buildings 1 INGPHI SA Contact Bernard Adam Address Rue Centrale 9bis 1003 Lausanne, Switzerland Website www.ingphi.ch INGPHI is an engineering firm based in Lausanne (Switzerland) that focuses on creating and designing load bearing structures. It is specialized in numerical simulation, 3D modelling and innovative materials to continually improve and enhance projects quality. Each design project is viewed by INGPHI as creative work to develop unique and comprehensive structures also considering architectural criteria such as wise use of materials and complex geometries. Owner CEVA - CFF Architect Jean Nouvel & Eric Maria architects General Contractor SHZ Consortium Engineering Office INGPHI SA - Ingénieurs en Ouvrages d’Art Construction Period 01/2016 - 12/2019 The new trans-border CEVA railway connects the Geneva main station to the French network. The five new stations, built in the city, were designed by Jean Nouvel Atelier and Eric Maria architects in close collaboration with INGPHI structural engineers, all according to the same principle: large scale glass bricks (5.40 m x 2.70 m) supported by slender steel structures. The steel structures are frames, walls, roofs, footbridges and floors (up to 20 m high and 24 m spans). Roof beams are 3 m high. All steel elements, regardless of their function, are 120 mm wide welded built-up box sections. SCIA Engineer software was used for structural calculation. 3D beam models were built to calculate forces and displacements. The Steel code check module was used to identify the most critical elements. Buckling critical loads were calculated using the Stability module. Vibration periods were obtained using the Dynamics module to verify resonance effects under both pedestrian and wind excitations and to carry out seismic verifications. The main challenges of the project are related to the slenderness of all elements. Since the steel structures support glass façades, displacements are critical. Instability is critical for columns and roof beams. Dynamics is critical for floors. SCIA Engineer software was useful in achieving these design tasks and allowed for elegant steel structure design that meets high- level architectural requirements. CEVA Railway Stations - Geneva, Switzerland