Finite element study of bond-slip behaviour of CFRP and GFRP laminates on brick masonry
Tipus de documentProjecte Final de Màster Oficial
Data2009-07
Condicions d'accésAccés obert
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Reconeixement-NoComercial-SenseObraDerivada 3.0 Espanya
Descripció
Rehabilitation and preservation of historic monuments and ancient structures is attracting more and
more interest in the world. There are a certain amount of historic monuments which were built by using
brick masonry. As the development of fiber reinforced polymer (FRP) is getting more popular now,
applying bonded FRP to strengthen historic brick masonry monuments becomes one of the alternative
strengthening method. In the past decade, many researches have been carried out to investigate the
behaviour of bonded FRP to reinforced concrete structures. However, still a few contributions are
available concerning debonding problem on masonry. In this report, the experimental study which was
carried out by Panizza et al. (2009) about the bond-slip behaviour of CFRP and GFRP laminates on
brick masonry were briefly summarized. Based on the experimental results and the proposed bond-slip
equations, finite element analysis of the test specimens were carried out. Comparison of the results
obtained from different finite element models were made, they are: (1) coarse mesh versus fine mesh,
(2) exponential bond-slip versus bilinear bond-slip and (3) FRP with concentrated fibre property versus
FRP with distributed fibre property. The finite element results were also compared with the results
obtained from the analytical solution proposed by Yuan et al. (2004). With the stiffness of FRP assigned
as the average value of stiffness obtained from the test, the results obtained from both finite element
method and analytical solution compared well with the test results in term of both maximum load and
deflection. Parametric studies were carried out based on the analytical solution for different bond length
and width ratio of FRP to brick. It is found that the minimum required bond length for the current CFRP
and GFRP specimens studied are about 70 mm and 59 mm, respectively. When the bond length is
longer than the minimum required bond length, increasing the bond length does not increase the
maximum load capacity significant, however, the maximum deflection increases with increasing bond
length. For the current specimens studied, the width ratio of FRP to brick does not have significant affect
to the maximum load capacity and deflection, especially for specimen with lower stiffness ratio of FRP to
brick.
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01.pdf | Memoria | 1,913Mb | Visualitza/Obre | |
Presentation.ppt | Presentación | 2,306Mb | Microsoft PowerPoint | Visualitza/Obre |