Improving shear strength of unreinforced masonry walls by nano-reinforced fibrous mortar coating

Facconi, Luca; Conforti, Antonio; Minelli, Fausto; Plizzari, Giovanni

doi:10.1617/s11527-014-0337-0

Cited by 38 publications

(23 citation statements)

References 9 publications

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“…Unlike other similar studies [10,11]], this research not only intends to compare SRDP to other tests, but especially aims at establishing SRDP as a comprehensive and reliable test for the FRC characterization, with special focus on those structural applications in which FRC is provided in small thickness, i.e. sprayed concrete or tunnel lining applications [12], structural plaster overlays for retrofitting [13] and thin webbed elements.…”

Section: Introductionmentioning

confidence: 99%

Derivation of a simplified stress–crack width law for Fiber Reinforced Concrete through a revised round panel test

Minelli

Plizzari

2015

Cement and Concrete Composites

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Section: Introductionmentioning

confidence: 99%

Derivation of a simplified stress–crack width law for Fiber Reinforced Concrete through a revised round panel test

Minelli

Plizzari

2015

Cement and Concrete Composites

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“…Typically, infill walls have so far been proportioned and verified as nonstructural elements of the building and their role in the structural response has often been underestimated or completely neglected in design practice. Several research programs have recently addressed the need for a design of masonry infill walls with appropriate detailing to enhance their seismic behaviour (Calvi and Bolognini 2001;Mohammadi and Akrami 2010;Preti et al 2012;Markulak et al 2013;Facconi et al 2014). Two different research approaches can be identified, one aiming to strengthen the infill, in order to make it a structural element able to support seismic load, the other to limit the infill frame interaction by reducing the infill strength and stiffness.…”

Section: Introductionmentioning

confidence: 99%

Experimental testing of engineered masonry infill walls for post-earthquake structural damage control

Preti

Migliorati

Giuriani

2014

Bull Earthquake Eng

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The paper presents the results of an experimental campaign on the behaviour of engineered masonry infill walls subjected to both in-and out-of-plane loading. The aim of the research was to develop a design approach for masonry infill walls capable of solving their vulnerability and detrimental interaction with the frame structure when exposed to seismic excitation. Tests on two large-scale specimens and sub-assemblies were performed in order to evaluate the infill deformation capacity, the damage associated with different drift levels, and the mechanical properties of the components. A design solution with sliding joints to reduce the infill-frame interaction and ensure out-of-plane stability, which was proposed in a previous study, was developed and refined with focus on construction details. The aim of sliding joints is to ensure a predetermined mechanism in the infill wall, which is governed by hierarchy of strength and is capable of ensuring ductility and energy dissipation that can be taken into account in the design practice, thanks to the predictability of the response. The two infill wall specimens, one of them including an opening, reached up to 3 % in-plane drift with very little damage and supported an out-of-plane force equivalent to a horizontal acceleration four times the acceleration of gravity. The force-displacement hysteretic curve, sliding at the joints and crack pattern show the efficiency of the construction technique, based on affordable and tradition-like construction processes and materials. The technique, presented here for hollow fired-clay masonry units, can be extended to different masonry infill typologies.

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“…Furthermore, the TSFCM has demonstrated to be capable of properly reproducing the experimental bearing capacity, load deformation response and failure mode of a solid wall, used as reference (SW-R), previously tested at the University of Brescia (Facconi et al, 2015). The suitable prediction of TSFCM is herein demonstrated by comparing the overall response obtained from this approach to that experimentally measured and that determined from the numerical Disturbed Stress Field Model (DSFM).…”

Section: Numerical Modelsmentioning

confidence: 96%

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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Improving shear strength of unreinforced masonry walls by nano-reinforced fibrous mortar coating

Cited by 38 publications

References 9 publications

Derivation of a simplified stress–crack width law for Fiber Reinforced Concrete through a revised round panel test

Derivation of a simplified stress–crack width law for Fiber Reinforced Concrete through a revised round panel test

Experimental testing of engineered masonry infill walls for post-earthquake structural damage control

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

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