SCIA User Contest 2017 Online Book

63 Category 2: Civil Structures 2 Owner Town of Lausanne Architect Town of Lausanne General Contractor Marti Lausanne SA Engineering Office Emch+Berger SA Lausanne and MCS Laboratory (EPFL) Construction Period 11/2014 - 07/2015 The Martinet Footbridge is a part of a new pedestrian and bike path following the main railway line in the agglomeration of Lausanne, Switzerland. The UHPFRC (Ultra-High Performance Fibre Reinforced Cement-based Composite material produced from cement, additions (powders), hard fine particles, water, admixtures and high amount of relatively short steel fibres) structure is a girder of 15.3 m single span resting on two reinforced concrete abutment walls. The asymmetric U-shaped cross-section consists of 2 main girders, an “organic” one and one with a full web. Both girders form a half-frame with the bottom plate that is stiffened with ribs in the transverse direction. In the longitudinal direction, the structure consists of 9 precast segments connected by straight post-tensioned cables. Two models were established in SCIA Engineer: a strut and tie model and a model with beam elements and plates for the organic girder. The functions used in SCIA Engineer were: Import DXF, 2D and 3D frames, Graphical sections, Dynamics. The results from the SCIA Engineer model corresponded to the measured frequency on site. The project challenges were: construction cost not higher than for a conventional structure, original aesthetic expression, minimum maintenance and minimum use of resources. Martinet Footbridge - Lausanne, Switzerland Emch+Berger SA Lausanne Contact Rita Galrito Address Ch. d’Entre-Bois 29 1000 Lausanne, Switzerland Website www.emchberger.ch Emch+Berger SA in Lausanne is a structural engineering consultancy active in bridges, buildings and underground structures. The office employs 25 civil engineers and draughtsmen, who show engagement, competence and confidence. Our projects are generally characterised by quality and optimisation, sustainable and economic solutions and corresponding to our vision of civil engineering. The MCS Laboratory at the EPFL – Swiss Federal Institute of Technology is a research institute active for more than 15 years in the domain of UHPFRC technology.