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A platform for research: civil engineering, architecture and urbanism
Experimental investigation of nonconventional confinement for concrete using FRP
The present study investigates experimentally the behavior of concrete confined with FRP (fiber reinforced polymers) in the form of jackets which are applied according to a number of nonconventional techniques. Testing of L-shaped concrete specimens confined with FRP jackets leads to the following conclusions: Use of jackets without anchors results in limited increase in strength and deformability, regardless of the FRP thickness. Partial depth spike anchors provide a cost effective and easy to install method of confinement, by allowing the jacket to deform substantially and even exhaust its tensile capacity. The effectiveness of confining jackets increases as the spacing of anchors decreases. Based on preliminary test results on cylinders confined with FRP in various configurations it is concluded that unbonded jacketing with resin only at the overlap length is considerably less effective than fully bonded jacketing. Compared with fully bonded jackets, the effectiveness of spirally wrapped strips bonded at their ends only is slightly inferior in terms of strength, but practically unreduced in terms of deformability The strength of mortar plastering on concrete surfaces plays an important role on the effectiveness of FRP jacketing: the results obtained in this investigation indicate a reduction in confined concrete strength and deformability, but despite the relatively low strength of mortars the overall effectiveness of jacketing remains high.
Experimental investigation of nonconventional confinement for concrete using FRP
The present study investigates experimentally the behavior of concrete confined with FRP (fiber reinforced polymers) in the form of jackets which are applied according to a number of nonconventional techniques. Testing of L-shaped concrete specimens confined with FRP jackets leads to the following conclusions: Use of jackets without anchors results in limited increase in strength and deformability, regardless of the FRP thickness. Partial depth spike anchors provide a cost effective and easy to install method of confinement, by allowing the jacket to deform substantially and even exhaust its tensile capacity. The effectiveness of confining jackets increases as the spacing of anchors decreases. Based on preliminary test results on cylinders confined with FRP in various configurations it is concluded that unbonded jacketing with resin only at the overlap length is considerably less effective than fully bonded jacketing. Compared with fully bonded jackets, the effectiveness of spirally wrapped strips bonded at their ends only is slightly inferior in terms of strength, but practically unreduced in terms of deformability The strength of mortar plastering on concrete surfaces plays an important role on the effectiveness of FRP jacketing: the results obtained in this investigation indicate a reduction in confined concrete strength and deformability, but despite the relatively low strength of mortars the overall effectiveness of jacketing remains high.
Experimental investigation of nonconventional confinement for concrete using FRP
Experimentelle Untersuchung von unkonventionellen Ummantelungen von Beton unter Verwendung faserverstärkter Kunststoffe
Karantzikis, Michael (author) / Papanicolaou, Catherine G. (author) / Antonopoulos, Costas P. (author) / Triantafillou, Thanasis C. (author)
Journal of Composites for Construction ; 9 ; 480-487
2005
8 Seiten, 8 Bilder, 2 Tabellen, 17 Quellen
Article (Journal)
English
Experimental Investigation of Nonconventional Confinement for Concrete Using FRP
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