Friction on mortar-less joints in semi interlocking masonry

Hossain, Akhtar; Totoev, Yuri Z.; Masia, Mark J.

doi:10.1201/b21889-203

Cited by 21 publications

(13 citation statements)

References 7 publications

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“…One is topological SIM that uses special-shaped bricks and the other is mechanical SIM, which is similar to conventionally shaped bricks but with perforations and dowels (Totoev, 2015). Complementary researches on the water penetration and the thermal insulation conducted by Forghani et al (2016) identified two types of joint filler between SIM units; subsequently, the coefficient of friction of SIM depending on the joint fillers has been investigated by Hossain et al (2016).…”

Section: Description Of the Systemmentioning

confidence: 99%

Modeling Strategies of Ductile Masonry Infills for the Reduction of the Seismic Vulnerability of RC Frames

Milanesi

Hemmat

Morandi

et al. 2020

Front. Built Environ.

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The threat to human lives and the economic losses due to high seismic vulnerability of non-engineered traditional masonry infills subjected to earthquakes have been highlighted by several post-seismic surveys and experimental and numerical investigations. In the past decades, researchers have proposed different techniques to mitigate problems related to the seismic vulnerability of traditional masonry infills; however, a viable, practical, and universally accepted solution has not been achieved yet. Among the possible innovative techniques, the one using ductile (or pliable) infills have shown promising results in recent experimental tests. These infills have provided, indeed, a reduced in-plane stiffness and a very high displacement capacity. The research units of the University of Pavia/EUCENTRE (Italy) and the University of Newcastle (Australia) have proposed two different systems for ductile masonry infill based on dividing the masonry panel into a number of segments interconnected through horizontal sliding joints. The ductile masonry infill proposed by the University of Pavia subdivides the masonry panel into four horizontal subpanels using specially engineered sliding joints and presents a deformable mortar at the infill/structure interface, while the one conceived by the University of Newcastle is made of mortar-less specially shaped masonry units capable of sliding on all bed joints. The experiments conducted on the two novel systems have permitted the calibration of two numerical macromodels capable to replicate the overall in-plane seismic response of these ductile masonry infills. One approach is based on a spring model, as usually adopted for traditional masonry infill; the other calibrates the response of a semi-active damper model. The calibrated macromodel approaches have been adopted to demonstrate the enhanced behavior and the reduction of the seismic vulnerability of reinforced concrete (RC) framed structures with the employment of the ductile infills in comparison to structures with non-engineered masonry infills.

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Section: Description Of the Systemmentioning

confidence: 99%

Modeling Strategies of Ductile Masonry Infills for the Reduction of the Seismic Vulnerability of RC Frames

Milanesi

Hemmat

Morandi

et al. 2020

Front. Built Environ.

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“…Forghani et al [25] investigated the water penetration characteristics and thermal insulation properties of both mechanical and topological SIM panels and identified two types of joint fillers between SIM units, namely linseed oil-based putty and rubber foam tape (1.6mm thick and 12mm wide) which are suitable for the purpose. Hossain et al [26] researched the effect of these joint fillers on the coefficient of friction of SIM units. They concluded in their research that the joint filler with putty possesses a higher coefficient of friction compared to the other tested surfaces.…”

Section: Semi-interlocking Masonry (University Of Newcastle)mentioning

confidence: 99%

Estimation of Basic Dynamic Characteristics of Pliable Masonry Infills With Horizontal Sliding Joints From in-Plane Test Results

Milanesi¹,

Totoev²,

Morandi³

et al. 2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Many post seismic event inspections and studies conducted by different researchers have identified the threat to human lives and considerable economic losses related to the damage sustained by "traditional" masonry infills. Although several innovative infill solutions and new design approaches have been proposed, a viable practical and universally accepted solution has not been achieved yet. Among the very promising designs, according to the ongoing studies, are pliable infill panels with the in-plane stiffness reduced and the displacement ductility increased compared to "traditional" infills. One way to attain such a significant pliability of a masonry infill is to divide it into a number of segments interconnected through horizontal sliding joints. The research units at the University of Newcastle (Australia) and the University of Pavia have proposed and are studying two different infill systems of this type: one mortar-less made of specially shaped masonry units capable of sliding on all bed joints; another with infill masonry panel subdivided into several horizontal sub-panels using specially engineered sliding joints. Within this paper, two systems are compared and discussed with particular emphases on their basic dynamic characteristics required for seismic analysis.

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“…Forghani et al (2016) investigated the water penetration characteristics and thermal insulation properties of both mechanical and topological SIM panels, and they identified two types of joint fillers between SIM units, namely linseed oil-based putty and rubber foam tape (1.6 mm thick and 12 mm wide) which are suitable for the purpose. Hossain et al (2016) researched the effect of these joint fillers on the coefficient of friction of SIM units. They concluded in their research that the joint filler with putty possesses a higher coefficient of friction compared to the other tested surfaces.…”

Section: Introductionmentioning

confidence: 99%

“…A larger research project using mechanical and topological SIM units on SIM panels has been conducted recently at The University of Newcastle, Australia to obtain a better understanding on the cyclic behaviour of SIM panels using quasi-static tests. Based on the results obtained by Forghani et al (2016) and Hossain et al (2016), SIM panels were constructed using the putty as a joint filler between the SIM units. The main goal of this research paper is to report experimental results for mechanical SIM panel constructed with putty as joint filler under large in-plane shear displacement.…”

Section: Introductionmentioning

confidence: 99%

Experimental assessment of large displacement cyclic in-plane shear behaviour of semi-interlocking masonry panels

Hossain

Totoev

Masia

2019

IJMRI

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A semi-interlocking masonry (SIM) building system has been developed in the Centre for Infrastructure Performance and Reliability at The University of Newcastle, Australia for seismically vulnerable regions as an alternative to traditional masonry panels. This innovative masonry building system consists of mortar-less masonry panels with multiple sliding bed joints made of semi-interlocking units. The study presented herein focused on the experimental investigation of large cyclic in-plane shear behaviour of three different types of panels: 1) panel with an open gap between the steel frame and the top of the panel; 2) panel with foam in the gap; 3) panel with grout in the gap. This paper reports the results of this testing program with mechanically interlocking units with main focus on the force-displacement relationship and the energy dissipation capacity of panels. The structural performance of the SIM panels is also analysed, and potential displacement patterns are identified under large displacement.

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Friction on mortar-less joints in semi interlocking masonry

Cited by 21 publications

References 7 publications

Modeling Strategies of Ductile Masonry Infills for the Reduction of the Seismic Vulnerability of RC Frames

Modeling Strategies of Ductile Masonry Infills for the Reduction of the Seismic Vulnerability of RC Frames

Estimation of Basic Dynamic Characteristics of Pliable Masonry Infills With Horizontal Sliding Joints From in-Plane Test Results

Experimental assessment of large displacement cyclic in-plane shear behaviour of semi-interlocking masonry panels

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