The Application of Carbon Composites in the Rehabilitation of Historic Baroque Vaults

Witzany, Jiří; Brožovský, Jiří; Čejka, Tomáš; Kroftová, Klára; Kubát, Jan; Makovička, Daniel; Zigler, Radek

doi:10.3390/polym7121540

Cited by 11 publications

(9 citation statements)

References 38 publications

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“…The widespread use of curved masonry structural elements (arches, vaults) in the architectonical heritage justifies the great interest of the technical and scientific community on the study of these structural typologies. Many research activities published in the literature are devoted to the analysis of the effectiveness of CFRP reinforcements applied to masonry arches (or vaults) [23][24][25]. Such reinforcements can modify the classical collapse mechanisms of arches (due to the opening of four hinges or five in symmetrical arches), avoiding hinges-type mechanisms to occur [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Single lap shear tests of masonry curved pillars externally strengthened by CFRP strips

Rotunno

Fagone

Bertolesi

et al. 2018

Composite Structures

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The paper presents an experimental study concerning the bond behaviour of Carbon Fiber Reinforced Polymers (CFRP) sheet reinforcements applied to curved masonry surfaces. Such strengthening technique is more and more used in structural rehabilitation and retrofitting of existing buildings. Its effectiveness has been demonstrated by several studies published in the literature, mostly devoted to flat bonded surfaces. Seeing that CFRP are extensively applied on arches and vaults but only few research activities concern curved bonded surfaces, the experimental study described in this paper is aimed to contribute to fill this gap. The experimental program was carried out on portions of masonry arches, reinforced by CFRP sheets bonded at extrados or intrados, tested by a single lap shear test. The experimental results allowed to analyse the effectiveness of such reinforcements, loaded by actions tangent to an end of the reinforcement itself, with respect to its position (intrados or extrados) and to the curvature of the bonding surface. As expected, the results highlight that the bond behaviour strongly depend on the position of the reinforcement. In particular, the capacity of reinforcements bonded at the extrados increases with the curvature, while decreases with the curvature for those bonded at intrados.

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Section: Introductionmentioning

confidence: 99%

Single lap shear tests of masonry curved pillars externally strengthened by CFRP strips

Rotunno

Fagone

Bertolesi

et al. 2018

Composite Structures

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“…Two results were eliminated: one that was excessively large (MP3-C-C-8) and one that was excessively small (MP3-C-C-10). 4 Eight samples were successfully tested but only four gave valid results for the analysis. Four results were eliminated: two excessively large (MP1-A-B-6, MP1-A-B-7) and two excessively small (MP1-A-B-1, MP1-B-A-7).…”

Section: Resultsmentioning

confidence: 99%

“…To sum up, two types of equations are optimized in this study that apply separately to low and high normal stresses. Equation type II better fits the case study, which is presented below in Equations (3) and (4). In Equation 3, JCS a is the compression strength of the higher stiffness material and JCS b is the compression strength of the lower stiffness material.…”

Section: Previous Related Researchmentioning

confidence: 97%

“…Some of these buildings have very slender masonry load-bearing wall structures, with widths as narrow as 82 mm made of low compressive strength bricks, down to 5 MPa [3]. In these buildings, spraying cementitious materials on the structural masonry walls is a more feasible structural refurbishment solution than using more sophisticated concealed solutions [4].…”

Section: Introductionmentioning

confidence: 99%

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Bond Strength Tests under Pure Shear and Tension between Masonry and Sprayed Mortar

2020

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Sprayed mortar or shotcrete is a construction technology that could enhance existing masonry buildings’ resilience by reinforcing low-safety load-bearing walls. Many factors affect the resistance of shotcrete-reinforced structures. One of the most important is the bond strength at the interface between the shotcrete and the reinforced wall. According to previous technical literature, bond strength usually has two evaluation criteria: shear and tensile strength. The experimental campaign described in this article focused on the bond strength between sprayed mortar and three masonry materials without the influence of normal force or constraint, as well as the roughness of these materials. The analysis of these tests focused on determining the relation between bond strength, roughness, and material strength. The analyses revealed that material strength has a more significant effect on bond strength than roughness, and bond strength is related to shrinkage of the materials. On the basis of previous theories, these researchers found that when there is no obvious influence due to normal force and constraint, the shear strength and tensile strength are different, and the shear strength is likely to be the cohesion force of the two materials. Finally, this article concludes with a novel logarithmic relationship between these strengths.

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“…The [NAKI I] project included extensive experimental research into the strengthening of masonry, stone, brick and mixed masonry pillars, walls and barrel vaults with composites based on high-strength, mainly carbon and glass, fibres and epoxy adhesives or polymer-modified cement mixes [7][8][9][10][11][12][13].…”

Section: Vault Failure Mechanismsmentioning

confidence: 99%

Experimental Research Into Dynamic Properties of Masonry Barrel Vaults Non-Reinforced and Reinforced With Carbon Composite Strips

Ziegler

Witzany

Makovička

et al. 2016

CEJ

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The study of dynamic behaviour of vaults of historic buildings reveals new knowledge which can be used for the local analysis and stabilisation and rehabilitation designs of damaged vaulted structures. The analysis of the results of dynamic loading brings objective background material for the identification and localisation of failures according to MAC or COMAC criteria [1, 2] and the assessment of serviceability and structural reliability of vaulted structures of historic buildings .

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The Application of Carbon Composites in the Rehabilitation of Historic Baroque Vaults

Cited by 11 publications

References 38 publications

Single lap shear tests of masonry curved pillars externally strengthened by CFRP strips

Single lap shear tests of masonry curved pillars externally strengthened by CFRP strips

Bond Strength Tests under Pure Shear and Tension between Masonry and Sprayed Mortar

Experimental Research Into Dynamic Properties of Masonry Barrel Vaults Non-Reinforced and Reinforced With Carbon Composite Strips

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