Application of Ordinary Fiber-Reinforced Concrete Layer for In-plane Retrofitting of Unreinforced Masonry Walls: Test and Modeling

Dehghan, Seyed Mehdi; Najafgholipour,; Kamrava, Alireza; Khajepour, M.

doi:10.24200/sci.2018.20164

Cited by 4 publications

(4 citation statements)

References 36 publications

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“…Generally, in finite element ABAQUS software, three methods are suggested to model the nonlinear behavior of concrete, i.e., discrete cracking model, smeared cracking model, and Concrete Damage Plasticity model. Concrete Damage Plasticity material model is one of the most common constitutive models to simulate nonlinear behavior of brittle materials such as concrete [29,30].…”

Section:    mentioning

confidence: 99%

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Deformable nose design for the non-penetrating projectile

Taheri

Kavianipour

2023

Scientia Iranica

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This paper deals with the design of a deformable nose for the non-penetrating projectile in order to prevent its body deformation. Numerical, analytical and experimental studies have been carried out to analyze the effect of different nose shapes on the projectile deformation when it hits the brick wall. The projectile consists of an aluminum nose, a thin-walled steel cylinder body, and an end connector. This non-penetrating projectile can be used to carry a cargo that must reach its destination safely, for example in firefighting applications. To pursue this goal, the criterion utilized for the best design in this paper is stress and strain analysis. The geometric shape of the noses includes three types: type (a), type (b), and type (c). The first type of nose was flat shape. This nose was detached from the projectile by impact and did not prevent the projectile deformation. The second type of nose was a combination of flat and conical shapes. The projectile was also deformed by this nose. The third type of nose was a combination of flat, conical, and spherical shapes. Due to the maximum absorption of the impact energy, this type of nose prevented the deformation of the cargo and projectile.

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Section:    mentioning

confidence: 99%

“…Due to the correspondence of numerical results in the application of damaged plasticity model in ABAQUS software for brick walls with experimental results in [29], damaged plasticity model has been employed to model the plastic behavior of brick walls in this work.…”

Section:    mentioning

confidence: 99%

Deformable nose design for the non-penetrating projectile

Taheri

Kavianipour

2023

Scientia Iranica

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“…Although the advantages of reinforced masonry outweigh the disadvantages, it is necessarily necessary to evaluate some merits and demerits of reinforced masonry walls to appreciate the behaviors and performances in detail [5,6]. Fiber Reinforced Polymer (FRP), grid-type steel bars, con ned ele-ments, strut, and tie model are the most popular sources of strengthening; however, due to the paucity of guidance, design assessment, e ective detailing rules, and so forth, scientists may confront a challenging problem despite some accurate and reliable outcomes from di erent tested walls by Shermi and Dubey [7], Dehghani et al [8], and Mohebbi and Joghataie [9]. A typical case of masonry reinforcement is the application of steel bars to hollow perforated units.…”

Section: Introductionmentioning

confidence: 99%

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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“…Thus, the improvement of permeability increase reduces the likelihood of explosive spalling. Dehghan et al [8] focused on experimental evaluation and numerical simulation of a simple practical retro tting technique employing Fiber Reinforced Concrete (FRC) surface layer. In their research, the simple FRC mix has conventional available ber, lowber content, ordinary mix design, and applicable construction procedure.…”

Section: Introductionmentioning

confidence: 99%

The experimental assessment of the effect of polypropylene fibers on improvement of Nano-silica concrete behavior

et al. 2018

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In this study, the e ect of water-cement ratio on the mechanical properties (compressive, abrasion, tensile, exural strength, and permeability) of nano-silica concrete reinforced with polypropylene bers is evaluated. The specimens contain 4% of nano-silica, 0.30, 0.35, 0.40, 0.45, and 0.50 of water-cement ratios, and 0, 0.10, 0.15, 0.25, and 0.35 percent volumes of polypropylene bers. Other design features remain xed in all concrete samples. The results of the experiments showed that with decreasing the ratio of water to cement from 0.50 to 0.30, all the mechanical properties of the concrete were improved. In addition, the test results showed a signi cant increase in mechanical properties improvement of concrete by using polypropylene bers. Tensile strength, exural strength, and abrasion resistance of concrete increased up to 22%, 40%, and 27%, respectively, for the 28-day age specimens. In addition, a considerable reduction of hydraulic conductivity coe cient to 51% indicates high durability of these types of concrete. Compressive strength showed increment rates of 22%, 15%, and 14% for 7-, 28-, and 90-day age specimens, respectively.

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Application of Ordinary Fiber-Reinforced Concrete Layer for In-plane Retrofitting of Unreinforced Masonry Walls: Test and Modeling

Cited by 4 publications

References 36 publications

Deformable nose design for the non-penetrating projectile

Deformable nose design for the non-penetrating projectile

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

The experimental assessment of the effect of polypropylene fibers on improvement of Nano-silica concrete behavior

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