Experimental cyclic response assessment of partially grouted reinforced clay brick masonry walls

Sandoval, Cristián; Calderón, Sebastián; Almazán, José L.

doi:10.1007/s10518-018-0308-x

Cited by 41 publications

(23 citation statements)

References 22 publications

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“…As shown in Figure 13, doublewythe and Perforated bricks reinforced walls in this system are in good agreement with other reinforced systems. In walls with aspect ratios of 1 and 2, Zhang et al [32], Shabdin et al [33], Sandoval et al [34], and Farooq et al [35] showed a lower carrying capacity and displacement than double-wythe and perforated reinforced walls. Slender walls with an aspect ratio of (h=l = 2) had a better condition than this system, perhaps due to the location of steel bars in the wall.…”

Section: Comparison With Other Reinforced Systemsmentioning

confidence: 98%

Numerical Modeling of a New Reinforced Masonry System Subjected to in-Plan Cyclic Loading

2019

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This paper describes the behavior of walls under in-plane cyclic shear compression of a new reinforced masonry system composed of horizontal and vertical reinforcements based on Iran's national building regulation codes in two groups. In the rst group, grid-type steel bars were mounted on the cement core between solid clay bricks (double-wythe); in the second group, common grid-type steel bars were mounted on perforated bricks and trusses as horizontal reinforcements using advanced numerical simulation (LS-DYNA). A nonlinear nite element discrete modeling according to stressstrain models was applied to represent the previously modeled masonry walls. Masonry units included perforated bricks and solid clay bricks, and the mortar and bonding interfaces were shown as continuum elements. In order to validate the micro-modeling strategy, the input data were based on a reinforced masonry wall previously tested in the laboratory with clear identi cation and justi cation. Accordingly, the main objective of this paper is to (a) examine results of specimens in terms of maximum strength, ductility, energy absorption, and failure modes, (b) investigate the e ect of aspect ratio and reinforcement type, and (c) compare the modeled walls with other reinforced systems.

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Section: Comparison With Other Reinforced Systemsmentioning

confidence: 98%

Numerical Modeling of a New Reinforced Masonry System Subjected to in-Plan Cyclic Loading

2019

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“…Considering this context, the idealized envelope curve and the ductility in a load direction were calculated herein with a conservative approach. Consequently, δ u was assumed as the deformation at maximum lateral resistance (δ Vmax ), as already done in previous studies [21,28,35,37,41]. This hypothesis is based on the fact that the post-peak response of masonry shear walls exhibits large variability and represents an undesirable damage state to achieve.…”

Section: Ductilitymentioning

confidence: 99%

“…On the other hand, Ramírez et al [21] and Schultz et al [22] coincided in that the wall aspect ratio and the energy dissipation capacity are inversely correlated. In any case, these contradictory results could have been influenced by how the cross-section area is considered in the shear stress calculations, as already commented by Sandoval et al [28]. For example, some experimental works on PG-RM walls reported the shear stress over the total cross-section area (gross area) and others over the net-cross section area (total area discounting the ungrouted hollows).…”

Section: Introductionmentioning

confidence: 98%

Behavior of Partially Grouted Concrete Masonry Walls under Quasi-Static Cyclic Lateral Loading

et al. 2020

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Eight partially grouted (PG-RM) concrete masonry walls were tested to study the influence of the strength and width of blocks, the wall aspect ratio, the horizontal and vertical reinforcement ratio, and the presence of edge elements (flanges). The results were analyzed in terms of the failure mode, damage progression, shear strength, lateral stiffness degradation, equivalent viscous damping ratio, and displacement ductility. Additionally, the performances of some existing shear expressions were analyzed by comparing the measured and predicted lateral load capacity of the tested walls. Based on the results, a slight increment in the lateral stiffness was achieved when employing stronger blocks, while the shear strength remained constant. Besides, increasing the width of concrete blocks did not have a significant effect on the shear strength nor in the initial tangential stiffness, but it generated a softer post-peak strength degradation. Increasing the wall aspect ratio reduced the brittleness of the response and the shear strength. Reducing the amount of vertical reinforcement lowered the resulting shear strength, although it also slowed down the post-peak resistance degradation. Transversal edge elements provided integrity to the wall response, generated softer resistance degradation, and improved the symmetry of the response, but they did not raise the lateral resistance.

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“…According to recent studies [3,4], some shear estimation expressions give non-conservative results or large error ranges when assessing the resistance of bed-joint reinforced (BJR) PG-RM shear walls. In this sense, Araya-Letelier et al [5] have pointed out the need for more experimental evidence to fill out gaps in the knowledge and propose a more accurate shear design expression.…”

Section: Introductionmentioning

confidence: 99%

Detailed micro-modeling of partially grouted reinforced masonry shear walls: extended validation and parametric study

Calderón

Sandoval

Arnau

2021

Archiv.Civ.Mech.Eng

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Partially grouted reinforced masonry (PG-RM) shear walls have been widely used as structural elements in low- and medium-rise earthquake-resistant buildings. Nonetheless, assessing its shear strength represents a complex task mainly because the partial grouting provides a non-constant cross section, which results in heterogeneous stress–strain patterns. Consequently, refined modeling techniques are needed to reproduce local failure mechanisms taking place in these walls, which significantly influence the global response. In response to this issue, a detailed micro-modeling approach based on the finite element method was proposed in previous studies by the authors. Although the numerical strategy provided accurate results, further validation is required. Therefore, in this study, the experimental results of seven PG-RM shear walls of multi-perforated clay bricks with bed-joint reinforcement are employed as validation cases. These seven walls presented variations in five design parameters. The validated numerical model was then employed to perform a parametric study to assess the influence of the wall aspect ratio, axial pre-compression stress, and horizontal reinforcement ratio on the in-plane lateral behavior of PG-RM shear walls. The obtained results show that the three studied design parameters modified the crack patterns of the walls. Besides, increasing the axial pre-compression stress or reducing the aspect ratio resulted in higher walls’ shear strength. Additionally, decreasing the horizontal reinforcement ratio or increasing the aspect ratio generated a higher story-drift ratio at maximum lateral force. Finally, it was corroborated that the positive effect of the axial pre-compression stress on the walls’ shear strength decreases inversely proportional to the aspect ratio.

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Experimental cyclic response assessment of partially grouted reinforced clay brick masonry walls

Cited by 41 publications

References 22 publications

Numerical Modeling of a New Reinforced Masonry System Subjected to in-Plan Cyclic Loading

Numerical Modeling of a New Reinforced Masonry System Subjected to in-Plan Cyclic Loading

Behavior of Partially Grouted Concrete Masonry Walls under Quasi-Static Cyclic Lateral Loading

Detailed micro-modeling of partially grouted reinforced masonry shear walls: extended validation and parametric study

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