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Jafari, S. (author), Rots, J.G. (author), Esposito, R. (author)To date, several different structural representations of masonry are available for use in the numerical and analytical assessment methods, each calling for a distinct level of refinement regarding the material input. To determine material properties, in terms of strength, stiffness, and toughness under compression, bending, and shear loading,...journal article 2022
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Ferretti, Francesca (author), Jafari, S. (author), Esposito, R. (author), Rots, J.G. (author), Mazzotti, Claudio (author)The shove test (ASTM Standard C1531) is an experimental technique aimed at studying the shear-sliding behavior of brick masonry. It can be executed according to various testing methods that differ in the way the vertical compression load is applied and in the way bricks and/or joints are locally removed for inserting jacks. One of the most...journal article 2022
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Jafari, S. (author)Understanding the behaviour of unreinforced masonry (URM) structures requires in-depth insight into the mechanical properties of its constituents and their interaction under compression, tension, and shear loading. As a result, a complete picture of masonry characteristics, accounting for its full nonlinear response and its statistical...doctoral thesis 2021
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Jafari, S. (author), Rots, J.G. (author), Esposito, R. (author)In this study, tests on cores and companion tests on triplets are compared with respect to the evaluation of the nonlinear shear-sliding behaviour of masonry, including the determination of post-peak softening response. Due to its slightly-destructive sampling nature and its good agreement with triplet results, the core testing method is...journal article 2020
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Jafari, S. (author), Rots, J.G. (author), Esposito, R. (author)This study investigates the applicability of the core testing method to assess the complete nonlinear behavior of masonry in compression. A comparative experimental approach was adopted performing compressive tests on cores and companion wallets. Via a correlation study on seven objects, including literature data, a one-to-one correlation for...journal article 2019
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- Jafari, S. (author), Esposito, R. (author) report 2018
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- Jafari, S. (author), Ferretti, F. (author), Esposito, R. (author) report 2018
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Jafari, S. (author), Esposito, R. (author), Rots, J.G. (author)To accurately assess the performance of existing unreinforced masonry (URM) structures, the mechanical characteristics of masonry under compressive loading are required. The compression properties of existing URM can be evaluated through different methods, either performing destructive tests (DTs) or slightly destructive tests (SDTs). DTs can be...conference paper 2018
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Messali, F. (author), Esposito, R. (author), Jafari, S. (author), Ravenshorst, G.J.P. (author), Korswagen, Paul A. (author), Rots, J.G. (author)In recent years, induced seismicity in the north of the Netherlands significantly increased. As a consequence, the seismic assessment of the built environment, which mainly consists of unreinforced masonry (URM) structures not designed for seismic loads, became of high relevance. Within this context, an extensive multiscale testing program has...conference paper 2018
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Esposito, R. (author), Jafari, S. (author), Ravenshorst, G.J.P. (author), Schipper, H.R. (author), Rots, J.G. (author)In recent years induced seismicity in the Netherlands considerably increased. This phenomenon has a wide impact on the built environment, which is mainly composed by unreinforced masonry (URM) structures. These buildings were not designed for seismic loading, and present peculiar characteristics include very slender walls (100 mm thickness and 2...conference paper 2018
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Jafari, S. (author), Esposito, R. (author), Rots, J.G. (author)Starting point in this research is to find a quick and non-destructive method to characterize the mechanical properties of existing masonry. Tests on cylindrical cores have been recently introduced as a novel in-situ testing method to identify the properties of existing clay brick masonry. Currently, some researchers reported promising results,...conference paper 2017
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Pari, M. (author), Jafari, S. (author), Messali, F. (author), Esposito, R. (author), Rots, J.G. (author)Induced seismicity in the Groningen region of the Netherlands has led to a large scale testing campaign on Calcium silicate element masonry structures at Delft University of Technology. An overview of the finite element analysis (FEA) using an implicit solver, on the full scale quasi-static cyclic pushover test performed on a two-storey calcium...conference paper 2017
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- Jafari, S. (author), Esposito, R. (author) report 2017
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- Jafari, S. (author), Esposito, R. (author) report 2017
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- Jafari, S. (author), Licciardello, L. (author), Esposito, R. (author) report 2017
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Jafari, S. (author), Rots, J.G. (author), Esposito, R. (author), Messali, F. (author)In the northern part of the Netherlands, The recent seismic activities have raised concerns about the behavior of unreinforced masonry structures which were not designed and constructed to resist seismic loading. The first step towards assessment of seismic behavior of masonry structures is to characterize the material properties. This...journal article 2017
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- Jafari, S. (author), Esposito, R. (author) report 2016
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Rots, J.G. (author), Messali, F. (author), Esposito, R. (author), Jafari, S. (author), Mariani, V. (author)Computational models for masonry are briefly reviewed and judged upon their practical performance at the structural scale, i.e. at building level, in a nonlinear pushover or nonlinear time history setting. Particular attention is given to an anisotropic macro model based upon total stress-strain relations in tension, shear and compression...conference paper 2016
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- Jafari, S. (author), Panoutsopoulou, L. (author), Rots, J.G. (author) report 2015