Cyclic Behavior of Mortarless Brick Joints with Different Interlocking Shapes

Liu, Hongjun; Liu, Peng; Lin, Kun

doi:10.3390/ma9030166

Cited by 27 publications

(9 citation statements)

References 21 publications

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“…These blocks are rigid units which, on their faces, have locks keeping the blocks together, preventing them from sliding. Experimental and numerical tests [20] investigated the in-plane and out-of-plane capacity of masonry walls composed of blocks with corrugated interfaces. Out-of-plane behaviour of osteomorphic blocks and interfaces with cross-shaped locks were also experimentally investigated by Dyskin et al [21] and Ali et al [22], respectively.…”

Section: Introductionmentioning

confidence: 99%

Torsion-shear behaviour at the interfaces of rigid interlocking blocks in masonry assemblages: experimental investigation and analytical approaches

et al. 2021

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Increasing interest has recently been devoted to interlocking blocks/interfaces capable to enhance the sliding resistance of masonry joints to external forces. In this framework, this paper deals with the assessment of the torsion-shear capacity of the contact interface between the lock and the main body of an interlocking block, assumed to have a cohesive behaviour. The interlocking block is a rigid unit which, on its faces, have square cuboidal locks keeping the adjacent/overlapped blocks together and preventing blocks from sliding. Two numerical approaches and a novel ad hoc experimental investigation are proposed to simulate the torsion-shear behaviour by applying eccentrical shear forces to the lock. First, concave, convex and corrected concave formulations provided by the literature for assemblages of rigid blocks with conventional planar joints are extended to model the interlocking block behaviour. Then, according to a second approach based on the discrete element method, the concave-shaped interlocking block is modelled by convex polyhedrons representing the lock and the main body of the block, considered as individual rigid units stacked over each other with a cohesive contact in between. A novel experimental investigation on the limiting pure shear and torsion-shear combinations at the lock interface made of cohesive material is also presented. Two different mortars were chosen to make the specimens, which were casted using 3D printed moulds, and different test configurations were set up to simulate shear and torsion-shear failures. The analytical and numerical results are compared with each other and against the experimental ones, with interesting remarks on the application of the different approaches.

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Section: Introductionmentioning

confidence: 99%

Torsion-shear behaviour at the interfaces of rigid interlocking blocks in masonry assemblages: experimental investigation and analytical approaches

et al. 2021

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“…The interlocking blocks are rigid block units which, on their faces, have locks keeping the blocks together and preventing blocks from sliding. Experimental and numerical tests [9,10] investigated the inplane and out-of-plane capacity of masonry walls composed of blocks with corrugated interfaces. Out-of-plane behaviour of osteomorphic blocks and interfaces with cross shaped locks were also experimentally investigated by Dyskin et al [11] and Ali et al [12], respectively.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Torsion-Shear Behaviour at the Interfaces of Interlocking Masonry Block Assemblages

Casapulla¹,

Mousavian²,

Argiento³

et al. 2021

12th International Conference on Structural Analysis of Historical Constructions

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This paper presents an experimental investigation on the initial shear (cohesion) and torsion-shear strengths at the interface of an interlocking masonry block. An interlocking block is a rigid unit with locks avoiding the block to slide. This improves the seismic response of dry jointed assemblages of masonry structures subjected to in-plane and out-of-plane loading. The experimental investigation is designed and carried out for the corrugated interface having one lock with rectangular cross section, i.e. the specimen is an interlocking unit composed of a main body and a lock located on the upper face of the main body. Cementbased mortars are selected to reproduce the specimen, casted using a mould provided by a 3D printer, and both the lock and the main body are kept rigid during the tests. The initial shear and torsion-shear capacities of the interface at which the lock is connected to the main body are assessed together with its quasi-brittle fracture and registered in terms of loaddisplacement curves. In the designed setup, the horizontal force is applied to the rigid lock until it is disjointed from the rigid main body of the block, while the effect of rocking during the shear test is avoided. The force and the displacements are measured using a load cell and Linear Variable Displacement Transducers (LVDTs), respectively. The experimental programme includes four different sets with different load application points and different load directions, each set repeated on a number of similar specimens. Empirical formulations between the initial shear and compressive strengths of the lock interface are also evaluated.

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“…791235 [14], is one of the first efforts following this design approach to develop a digital tool for structurally feasible assemblages of masonry blocks with non-planar corrugated dry joints. An increasing popularity of the interlocking blocks applications has recently been registered with studies on the: in-plane and out-of-plane capacity of masonry walls with corrugated joints [15][16][17], out-of-plane capacity of masonry walls with osteomorphic blocks [18,19] and cross-shaped joints [20], other than with conventional blocks [21,22], and structural behaviour of wooden joineries with various shapes [23]. Despite this increasing interest, there are still few digital tools developed to design structurally feasible assemblages of interlocking blocks.…”

Section: Introductionmentioning

confidence: 99%

Quantifiable feasibility check of masonry assemblages composed of interlocking blocks

Mousavian

Casapulla

2020

Advances in Engineering Software

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This work introduces a digital tool to model single layer assemblages of interlocking blocks and quantify their structural feasibility. Interlocking blocks are rigid units that, on their faces, have locks keeping the blocks together and preventing them from sliding. The tool measures the structural infeasibility of an assemblage as a numerical value, so that the designer can adjust the geometric parameters of the assemblage and the interlocking faces to minimize the measured infeasibility. This enables the designer to remove the infeasibility according to a measured quantity and not by trial and error. To analyse the structural soundness of a model with corrugated interfaces, limit analysis has been extended to address two different sliding behaviours in two orthogonal directions. This method is comprehensively validated in this paper by comparing the thinnest feasible model of systems composed of conventional blocks existing in the literature and the models composed of interlocking blocks. Then, as the core of this work, the extended limit analysis is reformulated to develop an optimization problem to measure the structural infeasibility. The optimal solution is such that the tangential internal forces are the closest ones to the valid sliding ranges, while the model is in equilibrium and the internal normal forces are in compression. The method is validated by comparing the measured infeasibility to the structural soundness of assemblages with different geometric properties of the interlocking block faces. Finally, the performance of the developed digital tool to design single layer assemblages with arbitrary shapes is demonstrated through several examples.

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Cyclic Behavior of Mortarless Brick Joints with Different Interlocking Shapes

Cited by 27 publications

References 21 publications

Torsion-shear behaviour at the interfaces of rigid interlocking blocks in masonry assemblages: experimental investigation and analytical approaches

Torsion-shear behaviour at the interfaces of rigid interlocking blocks in masonry assemblages: experimental investigation and analytical approaches

Experimental Investigation on the Torsion-Shear Behaviour at the Interfaces of Interlocking Masonry Block Assemblages

Quantifiable feasibility check of masonry assemblages composed of interlocking blocks

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