Numerical Modeling of Traditional Masonry Walls Strengthened with Grout Injection

Doran, Bilge; Yüzer, Nabi; Aktan, Selen; Oktay, Didem; Ulukaya, Serhan

doi:10.1080/15583058.2019.1618970

Cited by 8 publications

(4 citation statements)

References 30 publications

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“…To address the limitations of the detailed micro-modelling approach, a simplified micro-modelling technique was developed. The use of simplified micro-modelling is prevalent in the numerical analysis of masonry due to its straightforwardness and substantial decrease in analysis duration in comparison to intricate micro-modelling, as evidenced by various studies, such as those by Doran et al [37][38][39]. Micro-models, according to Lourenco et al [40][41][42][43], are probably the best tools available for understanding masonry behaviour.…”

Section: Finite Element Simulation and Verification Via Results From ...mentioning

confidence: 99%

Improved Bond Stress-Slip Relationships for Carbon Fibre-Reinforced Polymer-Strengthened Masonry Triplets

Hashemi,

Ayoub

2024

Buildings

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Carbon fibre-reinforced polymer (CFRP) emerges as a viable solution for reinforcing unreinforced masonry (URM) walls subjected to shear loads. While masonry structures are straightforward to construct, the complexity of the construction materials, especially in terms of their mechanical properties, poses challenges for numerical studies of their structural behaviour. Walls, being fundamental components in masonry construction, play a crucial role in transferring both horizontal and vertical lateral forces. This study investigates the enhancement of masonry wall behaviour through the reinforcement of CFRP. CFRP reinforcement increases ductility and strength, reducing the risk of failure under shear conditions. Additionally, CFRP composites present a practical solution to strengthening masonry structures compared to traditional reinforcement. However, brick, mortar, and CFRP have not been thoroughly investigated. Experimental tests on the bond behaviour of different configurations of CFRP-retrofitted masonry triplets have not been performed before and are therefore presented in this paper. Triplet specimens, comprising three bricks and two mortar joints, both with and without CFRP strengthening, were subjected to bond testing. The study affirms that masonry triplets strengthened with CFRP under shear loads exhibit strength levels at least four to six times greater than those without CFRP. The experimental work was carried out with eight different CFRP configurations on triplet masonry, and each test was repeated four times. Further, the bond stress-slip relationship in the case of masonry triplets with and without CFRP was predicted with new mathematical equations based on the conducted test results. These equations were included in the commercial finite element software ANSYS and used to conduct simulations of CFRP-reinforced masonry triplets. The numerical results indicate good agreement between the finite element model and the test results. The outcome of this research improves the current knowledge on the use of CFRP to reinforce masonry walls with brick and mortar, which will contribute to the understanding of the effect of CFRP on masonry structures.

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Section: Finite Element Simulation and Verification Via Results From ...mentioning

confidence: 99%

Improved Bond Stress-Slip Relationships for Carbon Fibre-Reinforced Polymer-Strengthened Masonry Triplets

Hashemi,

Ayoub

2024

Buildings

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“…Retrofitting historical masonries, the legacies of which should transmit to the future generation can impose substantial expenses on the nation. The high outlay of the initial ingredients (Borri et al, 2009;Burgoyne, 2009;Sarker et al, 2011) and the preparation requirements (Bostenaru-Dan et al, 2013;Dadras et al, 2019;Doran et al, 2019) may be the reason and proof for this allegation. Hence, an alternative method that requires lesser preparation and a more straightforward application procedure is desirable.…”

Section: -Research Significancementioning

confidence: 99%

“…The prevailing retrofitting techniques could be categorized but not limited to surface treatment like Ferro cement, shotcrete, etc. (Tasnimi and Rezazadeh, 2012;Lin et al, 2016;Shabdin et al, 2018), grout injection (Dadras et al, 2019;Doran et al, 2019;Ferreira et al, 2019), external reinforcement (FEMA 172;Borri et al, 2009;Corradi et al, 2019) and center coring (FEMA 172;Dadras et al, 2019;Paret et al, 2019). Several researchers discussed the disadvantages of these methods, like decrease in necessary space (ElGawady et al, 2004;Cannizzaro et al, 2017), increase in structural mass (ElGawady et al, 2004;Cannizzaro et al, 2017;Ferreira et al, 2019) and the loss of architectural facades (ElGawady et al, 2004;Papayianni, 2015;Dadras et al, 2019).…”

Section: -Introductionmentioning

confidence: 99%

In-plane retrofitting of masonry structures by using GFRP strips in the Bedjoints

Osmanzadeh¹,

Ahani²,

Rafezy³

et al. 2021

Preprint

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Many unreinforced masonry structures were vulnerable in the past earthquakes and required retrofitting. However, the vulnerability of masonry structures could solve by providing numerous retrofitting approaches, scarcity of appropriate methods that may provide a solution for the historical masonry structures with lesser effects on their façade is vehemently sensible. In this study, two one-third scale masonry wall specimens made by clay bricks were tested under constant vertical and cyclic lateral loading. The specimens consist of an unreinforced wall and a wall retrofitted by GFRP strips. This study investigates the seismic behavior of unreinforced masonry walls before and after using GFRP strips on their bedjoints. To this purpose, various patterns of using GFRP strips have been studied by simplified micro-modeling. The consequence indicates that the proposed retrofitting technique could improve the lateral strength and stiffness of the unreinforced masonry wall along with a considerable increase in the energy dissipation and ductility content, which leads to making a change in the behavior of the wall from brittle to ductile failure. The proposed method could apply to the modern historical structures in which cement mortar has been used as an adhesive between the masonry layers.

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“…A number of experimental and analytical studies have been conducted on the behavior of masonry shear walls to reach a comprehensive understanding of complex masonry behavior [ [1,3,[7][8][9][10][11][12]]. Proposed theoretical models for implementation to finite element analysis of masonry generally require a large number of material parameters that are difficult to measure easily and reliably.…”

Section: Numerical and Constitutive Modelingmentioning

confidence: 99%

Nonlinear Behaviour of Two-Whyte Stone Walls

Dinç-Şengönül¹,

Hothot²,

Doran³

et al. 2021

12th International Conference on Structural Analysis of Historical Constructions

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Engineers work hard to convert the highly uncertain and nonlinear behavior of historic masonry structures into something that can be understood with mathematical certainty. Therefore, practical and also accurate structural analysis techniques are still needed for the preserve the historical monuments as a huge cultural heritage. In this context, determining the mechanical properties of historical walls under in-plane and out-of-plane lateral loadings is one of the most important aim. This study aims to investigate the three dimensional (3D) nonlinear behaviour of stone walls subjected to a combination of lateral and vertical loads using approprate constitutive numerical modeling. For this purpose, a simplified micro modeling approach has been proposed for the 3D nonlinear finite element analysis (NLFEA) of stone wall. The dry-stone masonry wall from the literature has been used in the verification step for the proposed model. After that, the new two-whyte stone wall has been constructed in accordance with the original material characteristics derived from the experimental studies and tested under shear compression. Finally, numerical results of NLFEA and experimental results of walls have been compared. It was observed that the numerical analysis results are well matched with the experimental ones.

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Numerical Modeling of Traditional Masonry Walls Strengthened with Grout Injection

Cited by 8 publications

References 30 publications

Improved Bond Stress-Slip Relationships for Carbon Fibre-Reinforced Polymer-Strengthened Masonry Triplets

Improved Bond Stress-Slip Relationships for Carbon Fibre-Reinforced Polymer-Strengthened Masonry Triplets

In-plane retrofitting of masonry structures by using GFRP strips in the Bedjoints

Nonlinear Behaviour of Two-Whyte Stone Walls

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