Experimental Study of Solid and Hollow Clay Brick Masonry Walls Retrofitted by Steel Fiber-Reinforced Mortar Coating

Facconi, Luca; Minelli, Fausto; Lucchini, Sara S.; Plizzari, Giovanni

doi:10.1080/13632469.2018.1442264

Cited by 19 publications

(6 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…were G can be assumed as 35% of E v as in Wilding et al [76]. Equation ( 2) is also consistent with the results of recent experimental investigations on URM panels tested in two orthogonal directions [77];…”

Section: Numerical Modelling Of Experimental Testssupporting

confidence: 86%

Seismic fragility models for typical non-engineered URM residential buildings in Malawi

et al. 2021

View full text Add to dashboard Cite

Malawi is an earthquake-prone country that lies within the East African Rift. A large proportion of its population lives in non-engineered single-storey constructions made of clay bricks and low-strength mortar. Walls are typically single-skin and often lack adequate wall-to-wall connections, leaving them vulnerable to seismic actions. This work reports a comprehensive study on the seismic fragility of unreinforced masonry buildings of the Malawi housing stock. The probability of exceeding different levels of in-plane/out-of-plane damage is estimated by considering the aleatory and epistemic uncertainties of the problem. Inter-building and intra-building variability are accounted for by adopting material test results and building survey data collected in Malawi. The inplane capacity of building walls is calculated through a finite element model that considers the orthotropic properties of masonry. The out-of-plane capacity is computed using an analytical solution, developed for walls in one way bending. In addition, record-to-record variability is considered. The new country-specific fragility models result more conservative that global estimates, which reflects the high vulnerability of Malawian masonry buildings. These fragilities can be integrated into catastrophe modelling platforms for earthquake risk assessment in Malawi and in the wider East African region.

show abstract

Section: Numerical Modelling Of Experimental Testssupporting

confidence: 86%

Seismic fragility models for typical non-engineered URM residential buildings in Malawi

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Note that the samples provided with a single layer of coating included only masonry with vertical holes. As better explained in previous works [17,18], the coating application technique consisted of the following main phases:…”

Section: Characterization Of Sfrmmentioning

confidence: 99%

“…In real practice, a minimum of 6 connectors per square meter should be used, which corresponds to an average spacing of 400 mm, as well studied in a previous paper [17]. The latter was adopted for the specimens UCH-RR.…”

Section: Characterization Of Sfrmmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2020

Self Cite

View full text Add to dashboard Cite

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.

show abstract

“…As strengthening material, FRC or FRM has been studied as an externally bonded strengthening system applied onto concrete bridge piers [21], masonry walls [22,23], or at the intrados of masonry arches [24], with promising results. Among the advantages of FRC or FRM, it can be noticed that the use of high performance cementitious matrix guarantees an adequate vapor permeability with considerable abrasion resistance and high durability [25].…”

Section: Introductionmentioning

confidence: 99%

Bond behavior of steel fiber-reinforced mortar (SFRM) applied onto masonry substrate

Zampieri

Simoncello

Libreros

et al. 2020

Archiv.Civ.Mech.Eng

View full text Add to dashboard Cite

Masonry was the most used material during the last centuries to build constructions. Most of the existing masonry structures (buildings, bridges etc.) were built without considering some important structural considerations that are important nowadays. Moreover, due to factors such as the increasing of service loads, materials aging, structural damage, etc., existing masonry structures require strengthening interventions. The definition of optimal strengthening strategies using traditional and innovative materials is still an important issue of the scientific research. In fact, during the last decade, many researchers focused their attention studying innovative composites materials, such as fiber-reinforced polymers (FRP) and fiber-reinforced cementitious matrix (FRCM) composites, for the strengthening of existing masonry structures. This research has focused on aspects such as the bond behavior between the substrate and the composite materials, the structural behavior of the strengthened masonry and concrete structures, and the compatibility and reversibility of these materials when bonded to existing substrates. In this study, the bond behavior of a composite material known as steel fiberreinforced mortar (SFRM), recently used as for the strengthening of existing structures, applied onto masonry structures is analyzed experimentally and numerically. First, the material is characterized experimentally with the aim of getting insight on its behavior and applicability when applied as an innovative technique for the strengthening of masonry and to obtain mechanical parameters required for the numerical models. Mechanical properties of the SFRM studied included flexural and compressive strength, tensile strength, and residual flexural strength. The SFRM bond behavior on masonry substrates was evaluated by means of double shear lap tests. In addition, the experimental tensile and bond behavior of the SFRM is studied numerically through finite element models validated using the results obtained during the experimental tests. Results show that if an adequate bonded length is provided, the SFRM can fully develop its tensile strength as detachment from the substrate is not observed.

show abstract

Experimental Study of Solid and Hollow Clay Brick Masonry Walls Retrofitted by Steel Fiber-Reinforced Mortar Coating

Cited by 19 publications

References 19 publications

Seismic fragility models for typical non-engineered URM residential buildings in Malawi

Seismic fragility models for typical non-engineered URM residential buildings in Malawi

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

Bond behavior of steel fiber-reinforced mortar (SFRM) applied onto masonry substrate

Contact Info

Product

Resources

About