A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Concrete walls with cut-out openings strengthened by FRP confinement
Redesigning buildings to improve their space efficiency and allow changes in use is often essential during their service lives to comply with shifts in living standards and functional demands. This may require the introduction of new openings in elements such as beams, walls and slabs, which inevitably reduces their structural performance, and hence necessitates repair or strengthening. However, there are uncertainties regarding both the effects of openings and the best remedial options. Here we report an experimental investigation of the effectiveness of fiber reinforced polymer (FRP)-based strengthening for restoring the axial capacity of a solid reinforced concrete wall after cutting openings. Nine half-scale specimens, designed to represent typical wall panels in residential buildings with and without door type openings, were tested to failure. FRP-confinement and mechanical anchorages increased the axial capacity of walls with small and large openings (which had 25% and 50% reductions in cross-sectional area, respectively) by 34-50% and 13-27%, to 85 94.8% and 56.5-63.4% of their pre-cutting capacity, respectively.
Concrete walls with cut-out openings strengthened by FRP confinement
Redesigning buildings to improve their space efficiency and allow changes in use is often essential during their service lives to comply with shifts in living standards and functional demands. This may require the introduction of new openings in elements such as beams, walls and slabs, which inevitably reduces their structural performance, and hence necessitates repair or strengthening. However, there are uncertainties regarding both the effects of openings and the best remedial options. Here we report an experimental investigation of the effectiveness of fiber reinforced polymer (FRP)-based strengthening for restoring the axial capacity of a solid reinforced concrete wall after cutting openings. Nine half-scale specimens, designed to represent typical wall panels in residential buildings with and without door type openings, were tested to failure. FRP-confinement and mechanical anchorages increased the axial capacity of walls with small and large openings (which had 25% and 50% reductions in cross-sectional area, respectively) by 34-50% and 13-27%, to 85 94.8% and 56.5-63.4% of their pre-cutting capacity, respectively.
Concrete walls with cut-out openings strengthened by FRP confinement
Popescu, Cosmin (author) / Sas, Gabriel / Blanksvärd, Thomas / Täljsten, Björn
2016
Article (Journal)
English
Concrete Walls with Cutout Openings Strengthened by FRP Confinement
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