Dynamic response of RC beams strengthened with near surface mounted Carbon-FRP rods subjected to damage

11th International Conference on Damage Assessment of Structures

物理学;材料科学

Capozucca, R.^1 ; Blasi, M.G.^1 ; Corina, V.^1

DICEA, Polytechnic University of Marche, Ancona

60100, Italy^1

关键词: Circular rods;    Concrete beam;    Cracking of concrete;    Fiber reinforced polymers;    Frequency changes;    Near surface mounted;    Static bending tests;    Surface configuration;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/628/1/012094/pdf
DOI  :  10.1088/1742-6596/628/1/012094

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Near surface mounted (NSM) technique with fiber reinforced polymer (FRP) is becoming a common method in the strengthening of concrete beams. The availability of NSM FRP technique depends on many factors linked to materials and geometry - dimensions of the rods used, type of FRP material employed, rods' surface configuration, groove size - and to adhesion between concrete and FRP rods. In this paper detection of damage is investigated measuring the natural frequency values of beam in the case of free-free ends. Damage was due both to reduction of adhesion between concrete and carbon-FRP rectangular and circular rods and cracking of concrete under static bending tests on beams. Comparison between experimental and theoretical frequency values evaluating frequency changes due to damage permits to monitor actual behaviour of RC beams strengthened by NSM CFRP rods.