Identification of Shear Parameters of Masonry Panels Through the In-Situ Diagonal Compression Test

Brignola, Anna; Frumento, Silvia; Lagomarsino, Sergio; Podestà, Stefano

doi:10.1080/15583050802138634

Cited by 139 publications

(96 citation statements)

References 10 publications

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“…Brignola et al [19] have recently proposed a different interpretation of the tests, assuming that the stress field in a square panel with diagonal compression is not uniform. As demonstrated theoretically by Frocht [20] and as can easily be shown by a finite element analysis [19], the elastic solution provides the following stress state at the centre of a panel subjected to a diagonal load:…”

Section: Test Setupmentioning

confidence: 99%

Shear behavior of unreinforced and reinforced masonry panels subjected to in situ diagonal compression tests

Borri

Castori

Corradi

et al. 2011

Construction and Building Materials

102

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Section: Test Setupmentioning

confidence: 99%

Shear behavior of unreinforced and reinforced masonry panels subjected to in situ diagonal compression tests

Borri

Castori

Corradi

et al. 2011

Construction and Building Materials

102

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“…For all the wall panels, the experimental curve was approximately linear prior to crack initiation, followed by a nonlinear portion of the curve up to the maximum strength. This similar behavior was also observed in other studies [38,[47][48][49]. The curves are plotted to a scale of a maximum strain, ε max , 0.005 which corresponds to a drift of 0.5% (which is the allowable drift limit for design of masonry structures, considered to be an optimum value where the comparisons of all the experiments may be presented.…”

Section: Resultsmentioning

confidence: 57%

In-plane Shear Strengthening of Unreinforced Masonry Walls Using GFRP Jacketing

Mustafaraj¹,

Yardım²

2017

Period. Polytech. Civil Eng.

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In this paper, it is presented the experimental results of a campaign on diagonal compression tests, as of ASTM E519- IntroductionUnreinforced masonry (URM) buildings are one of the most used construction type in Europe, around the Mediterranean basin and Balkan peninsula. These regions are characterized with medium-to-high levels of seismic hazard. A vast number of URM buildings in these regions are vulnerable against earthquakes which are acknowledged to be one of the major cause of their damage, often even for their collapse. In such event, the load bearing walls are subjected to a combination of lateral seismic forces, that are in the form of out-of-plane or in-plane loading depending on the orientation of the building with seismic loading direction.Masonry structures, under such type of loading condition, manifest a brittle behavior, a relatively poor performance and are susceptible to high degrees of structural damage. Since the out-of-plane failure could be avoided by additional structural elements, the overall seismic performance of URM buildings depends on the capacity of in-plane walls to safely transfer the lateral loads to foundations, providing the post-earthquake stability necessary to avoid collapse of the entire structure [1].Moreover, during their lifespan, many of those buildings have suffered from the combined effects of inadequate construction techniques, seismic and wind loads, foundation settlements and deterioration of construction materials [2].To increase low parameters of masonry such as tensile and shear strength, as well as to improve the poor structural performance of URM structures under seismic actions, various strengthening techniques have been developed and applied throughout history of construction. The earliest techniques, the so-called traditional, consist of applying the reinforcement in form of: (i) filling cracks and voids by grouting; ii) stitching of large cracks and weak areas with metallic or brick elements; iii) external or internal post-tensioning with steel ties; iv) shotcrete jacketing; v) ferrocement and vi) center core etc. [3,4].Some successful examples of ferrocement jacketing have been observed in concrete structures [5][6][7][8] as well as in masonry structures where ferrocement provided a considerable increase in ductility, improvement of crack resistance [9,10], and increased stiffness and load carrying capacity as well as increase of in-plane resistance [11][12][13][14][15].

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“…In contrasting to lab testing, Brignola and others work on characterizing shear strength of masonry walls utilized the diagonal shear test to perform in-situ compression testing of 24 masonry panels (Brignola, Frumento, Lagomarsino, & Podesta, 2009 (Franchi, Crespi, & Ronca, 2014 The aforementioned researchers show that the diagonal tensile test can provide a convenient means for studying how various factors affect masonry shear strength for both isolated (lab tested) and in-situ conditions. This test method allows the experimenter to determine tensile strength of the wall and shear properties (modulus and shear strain), along with material constituent and interaction parameters (such as cohesion, friction angle, and interlocking effects).…”

Section: Diagonal Shear Testing ("B")mentioning

confidence: 99%

Diagonal Tension Testing of Interlocking Compressed Earth Block Panels

Pringle¹

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This thesis examines the use of diagonal tension (shear) testing to determine factors affecting shear strength of Interlocking Compressed Earth Block (ICEB) panels. This work expands on the current information available about strength properties of ICEB assemblies, which are dry-stacked, as opposed to having mortared beds. Variables such as block strength, grout strength and grouting pattern can influence the results of these types of tests and are examined in this investigation.To study variables affecting diagonal shear strength, 9 panels were tested, consisting of blocks produced by a manual block press. Strength testing was adopted from common ASTM standards to determine constituent material properties. A modified version of ASTM E519 test procedure is used to perform diagonal tension testing. Imaging analysis, using a high resolution camera, was run simultaneously during testing to capture displacement histories of select panels.It was determined that both block and grout strength significantly affect the shear strength of ICEB panels. Additionally, vertical grouting and block type also have a strong influence. Imaging analysis results confirm that the dominant failure mode in ICEB panels is bed joint sliding both pre and post peak load, with noticeable displacements at head joint locations on a few panels. Lastly, diagonal cracking along the block face was noticeable on several panels following peak load. Further testing remains to determine other factors affecting shear strength, namely, the application of normal pre-compression loads to the panel.

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Identification of Shear Parameters of Masonry Panels Through the In-Situ Diagonal Compression Test

Cited by 139 publications

References 10 publications

Shear behavior of unreinforced and reinforced masonry panels subjected to in situ diagonal compression tests

Shear behavior of unreinforced and reinforced masonry panels subjected to in situ diagonal compression tests

In-plane Shear Strengthening of Unreinforced Masonry Walls Using GFRP Jacketing

Diagonal Tension Testing of Interlocking Compressed Earth Block Panels

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