Experimental results on the retrofitting of hollow brick masonry walls with reinforced high performance mortar coatings

Messali, Francesco; Metelli, Giovanni; Plizzari, Giovanni

doi:10.1016/j.conbuildmat.2017.03.112

Cited by 55 publications

(51 citation statements)

References 21 publications

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“…Moreover, the coating used for point mobility measurements has higher density (700 kg/m 3 ) because originally meant to ensure enhanced anti-seismic properties. 26…”

Section: Resultsmentioning

confidence: 99%

“…Moreover, the coating used for point mobility measurements has higher density (700 kg/m 3 ) because originally meant to ensure enhanced anti-seismic properties. 26 The mobility measurements for the uncoated wall distinctively show a modal behaviour at low frequency, while peaks start overlapping above 100 Hz. The mobility values are higher for the single basic wall when compared to the coated wall, indicating that the application of alumina-rich material makes the sample stiffer.…”

Section: Sound Insulationmentioning

confidence: 93%

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Experimental evaluation of the sound absorption and insulation of an innovative coating through different testing methods

2017

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The Lombardy Region and the Construction Technologies Institute of the National Research Council of Italy are promoting the development of an innovative coating nano-material for building retrofitting. The research aims at obtaining a material with higher sound absorption features when compared to conventional plasters, as well as fair thermal and sound insulation performances. In both design and testing stages, it is important to identify and measure key acoustic parameters. This article presents the characterisation of the new material in terms of sound absorption and insulation by means of reverberation room, impedance tube, sound transmission rooms and mobility measurements, together with a discussion on the limits and reliability of the different methods in relation to the specific frequency range and the peculiarities of the material under test. This study contributes to the definition of test procedures that can be applied to other noise-reducing treatments including meta-materials.

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“…Moreover, the coating used for point mobility measurements has higher density (700 kg/m 3 ) because originally meant to ensure enhanced anti-seismic properties. 26…”

Section: Resultsmentioning

confidence: 99%

Section: Sound Insulationmentioning

confidence: 93%

Experimental evaluation of the sound absorption and insulation of an innovative coating through different testing methods

2017

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“…The wall was tested by applying variable horizontal cyclic displacements through a concrete top beam at the top of the wall and an electromechanical jack having a 500 kN capacity, fixed to a reacting steel braced frame already used in former experimental research (Facconi et al, 2015;Messali et al, 2017). As shown in Figure 16, the jack was connected to the steel loading plate 1 which pushed the loading cell and the Reinforced Concrete (RC) distributor top beam towards the right (positive loading direction).…”

Section: Test Set Upmentioning

confidence: 99%

New openings in unreinforced masonry walls under in-plane loads: a numerical and experimental study

Vera¹,

Metelli²,

Barros³

et al. 2021

IJMRI

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Nowadays existing masonry buildings are frequently modified to satisfy living demands. These modifications may require the addition of new windows or doors in walls of structural functionality. In engineering practice, such modifications are generally designed and verified for vertical loads while, for seismic loads, the changes in the walls' structural behaviour are not yet fully understood. Consequently, current design may incorrectly estimate the in-plane response of the perforated walls. This paper presents an evaluation of the effects of the introduction of new openings in masonry walls under in-plane loads, by a numerical and experimental approach. Two parameters are considered for the numerical studies: opening size and eccentricity. The results show that the loss in stiffness and strength due to new openings are proportional to the opening area and that the eccentricity might change the wall response going from rocking to shear dominant behaviour, depending on the load direction.

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“…The traditional methods include surface treatments (i.e. shotcrete [6,7], ferrocement, reinforced mortar coating [8]), prestressing with steel bars/ties and grout injections [9]. Besides these methods, other technologies have been recently developed by adopting advanced materials such as externally bonded fiberreinforced polymers (FRP), near-surface mounted FRP rebars and surface coatings reinforced with polymer-based grid reinforcement [10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Retrofitting unreinforced masonry by steel fiber reinforced mortar coating: uniaxial and diagonal compression tests

et al. 2020

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Thin layers of mortar reinforced with steel fibers can be applied on one or both sides of bearing walls as an effective seismic strengthening of existing masonry buildings. To assess the effectiveness of this technique, an experimental study on masonry sub-assemblages was carried out at the University of Brescia. This paper summarizes and discusses the main results of the investigation, which included mechanical characterization tests on masonry and its components as well as on the Steel Fiber Reinforced Mortar (SFRM) used to retrofit the masonry samples. Uniaxial and diagonal compression tests were carried out on both unstrengthened wallets and masonry samples retrofitted with 25 mm thick SFRM coating. Both single-sided and double-sided retrofitting configurations for application on wall surfaces were considered. The results highlighted the ability of the technique to improve the compressive and the shear behavior of masonry, even in case of single-sided strengthening. Moreover, no premature debonding of coating was observed. Lastly, the manuscript presents the results of a numerical investigation that was performed both to simulate the diagonal compression tests described in the first part of the paper and to predict the response of panels with different strengthening configurations.

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Experimental results on the retrofitting of hollow brick masonry walls with reinforced high performance mortar coatings

Cited by 55 publications

References 21 publications

Experimental evaluation of the sound absorption and insulation of an innovative coating through different testing methods

Experimental evaluation of the sound absorption and insulation of an innovative coating through different testing methods

New openings in unreinforced masonry walls under in-plane loads: a numerical and experimental study

Retrofitting unreinforced masonry by steel fiber reinforced mortar coating: uniaxial and diagonal compression tests

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