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A platform for research: civil engineering, architecture and urbanism
Concrete beams exposed to live loading during carbon fiber reinforced polymer strenghtening
It has become more and more important to repair and strengthen existing structures. One repair and strengthening method is plate bonding with FRPs (fiber reinforced polymers). It is of utmost importance to provide answers to whether or not a structure can be used during strengthening. This paper presents laboratory tests investigating the effect of live loads during the strengthening process. Both laminate plate bonding and the use of NSMR (near surface mounted reinforcement) have been investigated. It has been shown that for the beams strengthenend by laminate plate bonding or NSMR with epoxy, the cyclic loads do not significantly affect the strengthening effect for the tested beams. The small differences noticed in the tests can be due to normal scatter of the failure mode. However, the failures were controlled by anchorage in the concrete, and the absolute effect on the bond behavior could not be directly studied from the load-bearing capacity. The use of cementitious mortar together with NSMR is not suitable when cyclic loads are prevailing during hardening of the adhesive. A cementitious bonding agent together with NSMR does work when it cures under static conditions.
Concrete beams exposed to live loading during carbon fiber reinforced polymer strenghtening
It has become more and more important to repair and strengthen existing structures. One repair and strengthening method is plate bonding with FRPs (fiber reinforced polymers). It is of utmost importance to provide answers to whether or not a structure can be used during strengthening. This paper presents laboratory tests investigating the effect of live loads during the strengthening process. Both laminate plate bonding and the use of NSMR (near surface mounted reinforcement) have been investigated. It has been shown that for the beams strengthenend by laminate plate bonding or NSMR with epoxy, the cyclic loads do not significantly affect the strengthening effect for the tested beams. The small differences noticed in the tests can be due to normal scatter of the failure mode. However, the failures were controlled by anchorage in the concrete, and the absolute effect on the bond behavior could not be directly studied from the load-bearing capacity. The use of cementitious mortar together with NSMR is not suitable when cyclic loads are prevailing during hardening of the adhesive. A cementitious bonding agent together with NSMR does work when it cures under static conditions.
Concrete beams exposed to live loading during carbon fiber reinforced polymer strenghtening
Die Festigkeitserhöhung von Betonträgern mit carbonfaserverstärktem Kunststoff während des laufenden Betriebs
Carolin, Anders (author) / Täljsten, Björn (author) / Hejll, Arvid (author)
Journal of Composites for Construction ; 9 ; 178-186
2005
9 Seiten, 16 Bilder, 6 Tabellen, 18 Quellen
Article (Journal)
English
Concrete Beams Exposed to Live Loading during Carbon Fiber Reinforced Polymer Strengthening
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