Forthcoming articles


International Journal of Masonry Research and Innovation


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International Journal of Masonry Research and Innovation (20 papers in press)


Regular Issues


  • Behaviour of block masonry under in-plane loading   Order a copy of this article
    by Roberto Capozucca, Erica Magagnini 
    Abstract: In the design of buildings, the strength of modern masonry under compression and shear is crucial for safety in seismic areas. Modern unreinforced masonry (MURM) built with perforated clay blocks may also be considered adequate in terms of withstanding seismic action. However, the performance of MURM is influenced by many parameters such as solid or perforated units and strength, deformability and thickness of mortar joints. In this paper, the strength of blockwork walls built with two types of perforated clay blocks, lateral surfaces toothed and smooth, and different mortar joints has been experimentally tested under loading in-plane. An extensive investigation based on compression tests and diagonal compression tests of blockwork walls has been carried out. The experimental results are presented and discussed. The response of blockwork walls under diagonal tests have been analysed comparing experimental data with that obtained with finite element method (FEM).
    Keywords: blockwork masonry wall; experimental test; shear strength; FE analysis.
    DOI: 10.1504/IJMRI.2019.10016601
  • Natural Properties of Confined Masonry Buildings-- Experimental Case Studies and Possible Inferences   Order a copy of this article
    by Harshit Nema, Dhiman Basu 
    Abstract: Construction of faculty housing and students hostels in a fully-residential 400-acre academic campus of Indian Institute of Technology Gandhinagar(IITGN) in the State of Gujarat, India is the first large scale confined masonry construction in the country. Knowledge of dynamic properties of these buildings will provide valuable inputs to the seismic design recommendations of confined masonry buildings. Ambient and forced vibration tests (AVT and FVT) are conducted in some of the constructed buildings for the natural period and damping ratio. This paper presents the details of such case studies and compares the experimental results with general expectation considering reinforced concrete buildings with infilled masonry wall as the basis. Also recommended in this paper are some of the fine tuning in the experimental framework of conducting AVT and FVT, and processing the recorded data to identify the natural frequency with greater confidence level.
    Keywords: Ambient vibration testing (AVT); Forced vibration testing (FVT); Confined masonry buildings; Dynamic properties;.

  • A limit analysis approach for masonry domes: the basilica of San Francesco di Paola in Naples   Order a copy of this article
    by Concetta Cusano, Claudia Cennamo, Maurizio Angelillo 
    Abstract: The object of the present study is the basilica of San Francesco di Paola, an historical structure that well lends itself to use the graphic method of statics to analyse its stability for a twofold reason: on the one hand it is an interesting structure being dominated by a dome of considerable size with a solid appearance, and on the other, it is an entirely masonry structure for which no consolidation interventions with different materials have been necessary so far. This paper applies Limit Analysis based on the geometric equilibrium of the dome starting from detailed surveys of the church, from the knowledge of its history construction to the comprehension of the entire building. In a further analysis we go on to examine its structural behaviour through combined methods of graphic statics such as the slicing technique and the thrust line, which are far beyond the issues inherent to resistance, but rather refer to the methods of the ancient builders. Through the case study, this research demonstrates the potential of the graphical method of statics as a mean to understand the equilibrium of compression-only structures, such as masonry domes whose geometry constitutes the structure as an important role in the safety evaluation. The study carried out enriches previous researches developed around the same case study, and the new contribution is integrated by the analysis of stability of the buttress system that completes the work on the vertical loads, providing a more detailed assessment of the safety level of the structure.
    Keywords: masonry domes behaviour; limit analysis; safety evaluation.

  • Monotonic tests on masonry elements with different angles of inclination of the bed joints under uniaxial compression   Order a copy of this article
    by Weber Marius 
    Abstract: This paper describes the results from monotonic tests performed on masonry elements with different angles of inclination of the bed joints relative to the horizontal under uniaxial compression. Two different types of bricks (calcium-silicate and clay bricks) were tested under uniaxial compression stress state. The main test parameter was the angle of inclination of the bed joints, which was varied between 0 and 90 degrees in the interval of 15 degrees. The tests were performed in displacement control in order to capture the post-peak response of the masonry elements as well. The applied displacements were increased monotonically. During the tests, main measurements were performed to measure the edge deformation, detection of strain on the masonry surface using a photogrammetric method, and documentation of the crack propagation and fracture behavior. The strength and the stiffness properties, as well as stress-strain relationships as a function of the angle of inclination of the bed joints and the comparison between the principle directions of stresses and strains is reported here.
    Keywords: compression test; inclined bed joints; monotonic loading; macromodel.

  • Validation of a two-step simplified compatible homogenization approach extended to out-plane loaded masonries   Order a copy of this article
    by Elisa Bertolesi, Luis Silva, Gabriele Milani 
    Abstract: A two step homogenization model already formulated by the authors for the non-linear analysis of full scale structures in-plane loaded is herein extended to out of plane loaded masonries. A rectangular running bond elementary cell is discretized by means of twenty-four elastic CST elements and inelastic zero-thickness interfaces. In the present paper, the mechanical problem at the meso-scale is briefly recalled, whereas the out of plane homogenized stress-strain behaviour is evaluated by means of a simple on-thickness integration of the in plane homogenized curves deduced at the level of the elementary cell. At the macro-scale, the Rigid Body and Spring model is slightly modified in order to allow the development of both flexural (vertical and horizontal) and torsional failure mechanisms. The paper discusses the extension of the two step in-plane homogenization procedure to out of plane loaded masonries. A validation of the numerical outcomes is achieved adopting some full-scale masonry panels tested by Griffith and co-workers. To this scope, a series of non-linear structural analyses are conducted taking into account different parameters which have been varied during the experimental campaign. The numerical outcomes showed a satisfactory agreement in all the proposed simulations and evidenced the capability of the proposed approach to deal with different failure mechanisms as result of a combination of various experimental aspects.
    Keywords: Masonry; in-plane loads; out of plane loads; semi-analytical approach; compatible model of homogenization.

  • Macroelement and dynamic seismic analysis of the medieval government building of Perugia, Italy   Order a copy of this article
    by Marco Corradi 
    Abstract: This paper emphasizes the actual structural analysis of a multistory medieval building, located in Perugia, Italy, for seismic resistance. This is the local Governor building of the capital city of Umbria, known as Palazzo dei Priori, an iconic grade-I stone masonry construction. Strong emphasis is placed on specific issues, critical for the structural response of the building under the seismic action. Fundamental assessment methods are presented and discussed to find vulnerabilities and defects that affect its seismic response. The discussion includes the analysis by macro-elements (local analysis), leading to the identification to the most likely collapse mechanisms of the building under the seismic action. In addition to the macro-element method, a non-linear analysis is given for the whole building. All the used analyses are carried out with reference to the Italian guidelines for heritage protection and conservation and by considering the architectural and artistic assets of the building.
    Keywords: Historic masonry; earthquake engineering; numerical modelling; seismic assessment.

  • Testing and Analysis of Masonry Hollow Clay Block Prisms Filled with Mortar   Order a copy of this article
    by Marcio Nascimento, Humberto Roman, Fernando Fonseca 
    Abstract: In some design situations, in construction systems with structural masonry, an increase in the capacity of the walls is required, which can be achieved with the filling of empty cells of masonry blocks with grout. The Brazilian technical standard for clay masonry blocks aiming at attaining greater agility and flexibility in the construction process allows the use of bedding mortar instead of grout to fill the cells of the blocks. In this context, the objective of this study was to evaluate the mechanical behavior of prisms filled with bedding mortar. Six classes of mortar and one type of clay block with nominal resistance of 6 MPa were studied. The results of the compressive strength of the prisms indicate the viability of using bedding mortar with the same structural function as grout. This article presents also an analytical study to evaluate the mechanical behavior of clay block prisms filled with mortar. Analyses were conducted using a general-purpose, nonlinear finite element software that simulates structural behavior under different loading scenarios. A three-dimensional model of the prisms was developed using 8-node brick elements for both block and mortar with non-linear properties assigned to each material.
    Keywords: structural masonry; compressive strength; clay blocks; FEA; numerical modelling.

  • Effect of Modified Fiber Flour Wood on the Fresh Condition Properties of Cement Based Mortars   Order a copy of this article
    by Fadhel Aloulou, Sabrine Alila 
    Abstract: Abstract: The effect of wood fiber flour in a studied Portland cement material shows interesting mechanical properties. The objective of this work is the elaboration new composite materials by emulsion. The dispersion of wood fiber and compressive strength was studied. The results showed an improvement in compressive strength of over 40% with 2% added wood fibers flour. The chemical modification of the wood fibers by grafting alkyl chains into their surfaces changes from the hydrophilic state to the hydrophobic state which makes it necessary to reduce the amount of water absorbed by the sample. The addition of anionic surfactant: Sodium dodecylbenzenesulfonate (SDBS) in the mixing water further improves the surface of the samples by minimizing the pore size, hence the reduced water absorption. The alkaline treatment of the fibers before their injection into the cement paste has a very remarkable effect on the mechanical behavior of the composites.
    Keywords: Wood; Flour wood; Emulsion; surfactant ; cement.

Special Issue on: Special Issue An Italian Contribution to the Analysis of Masonry Structures

  • A 2D finite element based on an enriched kinematics for nonlinear analysis of masonry walls
    by Daniela Addessi, Elio Sacco 
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  • The model of Heyman and the statical and kinematical problems for masonry structures
    by Maurizio Angelillo 
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  • On the analysis of masonry arches
    by Nicola Maria Auciello 
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  • The spandrel of masonry buildings: experimental tests and numerical analysis
    by Bruno Calderoni, Emilia Angela Cordasco, Gaetana Pacella, Paolo Simoniello 
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  • Thrust evaluations of masonry domes. An application to the St. Peters Dome
    by Mario Como 
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  • Seismic vulnerability assessment of churches at regional scale after the 2009 LAquila earthquake
    by Gianfranco De Matteis, Giuseppe Brando, Valentina Corlito, Emanuela Criber, Mariateresa Guadagnuolo 
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  • On the shape optimization of the force networks of masonry structures
    by Giuseppe Rocchetta, Mariella De Piano, Valentino P. Berardi, Fernando Fraternali 
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  • Palazzo Ducale in Parete: remarks on code provisions
    by Giorgio Frunzio, Luciana Di Gennaro, Mariateresa Guadagnuolo 
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  • Some laser-scanner applications in structural analysis
    by Claudio Alessandri, Vincenzo Mallardo 
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  • Thrust network analysis of masonry vaults
    by Francesco Marmo, Daniele Masi, Daniele Mase, Luciano Rosati 
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  • Lateral torsional buckling of compressed open thin walled beams: experimental confirmations
    by Ida Mascolo, Marcello Fulgione, Mario Pasquino 
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  • Wall structure finite-element by BEM coupling
    by Vincenzo Minutolo, Eugenio Ruocco 
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