1 research outputs found
Experimental investigation on existing precast prc elements strengthened with cementitious composites
Existen varias investigaciones experimentales sobre el pol铆mero reforzado
con fibra (PRF), con el objetivo de comprender su comportamiento cuando
se aplican como refuerzo de elementos de hormig贸n armado, pero hay muy
pocos datos disponibles sobre el reforzamiento de elementos a escala real
con materiales compuestos cementicios. En particular, las formulaciones
de c贸digo de dise帽o son escasas o inexistentes.
En este estudio se investig贸 el comportamiento de cuatro vigas TT pretensadas
tomados de un edificio industrial existente. Uno de ellos se consider贸
como viga TT no reforzada de control, mientras que los otros se reforzaron
con diferentes t茅cnicas, concretamente con laminados FRP (pegados con
resina ep贸xica), fibras de carbono con matriz cementicia y fibras de acero
con matriz cementicia. Cada material involucrado en este estudio tambi茅n
se caracteriz贸 mec谩nicamente para obtener las principales propiedades
f铆sicas. Se obtuvieron espec铆menes adecuados de la viga TT existente para
caracterizar el hormig贸n y las barras de acero de refuerzo.A number of experimental investigations on fibre reinforced polymer (FRP), with the aim of understanding their behaviour when applied as strengthening of reinforced concrete elements, are available in the literature but very few information is available on strengthening real-scale elements with cementitious composites. In particular design code formulations are scanty or non-existent.In this study the behaviour of four precast pre-stressed TT beams taken from an existing industrial building was investigated. One of them was considered as control unstrengthened TT beam, whereas the others were strengthened with different techniques, namely with FRP laminates (glued with epoxy resin), carbon fibres with cementitious matrix and steel fibres with cementitious matrix. Each material involved in this study was also mechanically characterized to obtain the main physical properties. Adequate specimens were obtained from the existing TT beam to characterize the concrete and the reinforcing steel bars