Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effectiveness of GFRP sheets for shear strengthening of timber
The objective of this study was to develop a cost-effective shear-strengthening technique for timber stringers that is environmentally friendly and leads to a durable structure. Testing was performed on creosote-treated Douglas fir beams, with dimensions of 100x400x3650 mm, removed from a 40 year old bridge. Two strengthening schemes were investigated; incorporating vertical and diagonal glass fiber-reinforced polymer (GFRP) sheets applied to both shear spans. The diagonal scheme proved effective in increasing the average ultimate load, flexural stiffness, and deformability of the beams. Performance of the members reinforced using the vertical scheme, however, was poor compared to diagonally reinforced beams. The contribution of the diagonal sheets to the shear capacity of the stringers was around 12 % at service loads and 40 % at ultimate load. In conclusion, this study has shown that diagonal GFRP sheets are more effective than vertical sheets in shear-strengthening timber stringers with horizontal splits at their ends.
Effectiveness of GFRP sheets for shear strengthening of timber
The objective of this study was to develop a cost-effective shear-strengthening technique for timber stringers that is environmentally friendly and leads to a durable structure. Testing was performed on creosote-treated Douglas fir beams, with dimensions of 100x400x3650 mm, removed from a 40 year old bridge. Two strengthening schemes were investigated; incorporating vertical and diagonal glass fiber-reinforced polymer (GFRP) sheets applied to both shear spans. The diagonal scheme proved effective in increasing the average ultimate load, flexural stiffness, and deformability of the beams. Performance of the members reinforced using the vertical scheme, however, was poor compared to diagonally reinforced beams. The contribution of the diagonal sheets to the shear capacity of the stringers was around 12 % at service loads and 40 % at ultimate load. In conclusion, this study has shown that diagonal GFRP sheets are more effective than vertical sheets in shear-strengthening timber stringers with horizontal splits at their ends.
Effectiveness of GFRP sheets for shear strengthening of timber
Die Wirksamkeit von GFRP-Platten für die Scherfestigkeitserhöhung von Bauholz
Hay, Shaun (Autor:in) / Thiessen, Kenton (Autor:in) / Svecova, Dagmar (Autor:in) / Bakht, Baidar (Autor:in)
Journal of Composites for Construction ; 10 ; 483-491
2006
9 Seiten, 8 Bilder, 2 Tabellen, 12 Quellen
Aufsatz (Zeitschrift)
Englisch
Effectiveness of GFRP Sheets for Shear Strengthening of Timber
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