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Chillon Viaduct deck slab strengthening using reinforced UHPFRC: Full-scale tests


Medium: Tagungsbeitrag
Sprache(n): en 
Tagung: 4th International Conference on Concrete Repair, Rehabilitation and Retrofitting (ICCRRR-4), 5-7 October 2015 Leipzig, Germany
Jahr: 2015
Abstrakt: The Chillon Viaduct, built by prestressed box girder segmental construction, was constructed in the late 1960s. Recent examination of structural performance showed that punching of wheel loads through the deck slab is prevailing, though structural safety requirements currently can be fulfilled. Furthermore, the box girder concrete is prone to alkali silica reaction (ASR). The chosen strengthening measure is adding a layer of ultra-high performance fiber reinforced concrete additionally reinforced with steel rebars (R-UHPFRC) on the top surface of the deck slab, also serving as waterproofing layer. This paper reports on full-scale tests up to failure on specimens representing zones between and above the girder webs, respectively. The goal was to determine the impact of the strengthening layer on ultimate resistance and failure modes. This paper is comple-mented by a second contribution on finite element analyses of the tested specimens.

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