Experimental investigation of seismic strengthening technique for confined masonry buildings

Chourasia, Ajay; Singhal, Shubham; Parashar, Jalaj

doi:10.1016/j.jobe.2019.100834

Cited by 26 publications

(15 citation statements)

References 22 publications

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“…Reinforcement materials can include a bi-directional expanded wire mesh [30,31], orthogonal meshes with hot-rolled ribbed wires [32], and polymeric or fibre reinforced polymer meshes. Reinforced coatings can include relatively flexible fibre materials such as carbon, glass, basalt [20,[32][33][34], polypropylene, or polyester [15,33,35,36], as well as relatively stiff biaxial orthogonal geogrids [37], or triangular monolithic polymer grids [38]. The grids are typically embedded in conventional cement-based mortars, high performance mortars [32] or more sustainable lime-based mortars [31,32,39].…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical assessment of the shear behaviour of lime mortar clay brick masonry triplets

Bompa

Elghazouli

2020

Construction and Building Materials

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This study investigates the fundamental shear response of masonry triplets incorporating fired-clay bricks and hydraulic lime mortars. It examines the behaviour under ambient-dry and wet conditions, corresponding to 48h submersion in water, as well as the effectiveness of strengthening with fibre reinforced polymer (FRP) laminates and glass fibre meshes (GFM). After describing the materials, mix designs and specimen details, the main results from 50 triplet tests subjected to shear and normal pre-compression are presented. Digital image correlation measurement techniques, which are employed in order to obtain a detailed insight into the shear behaviour, enable clear identification and quantification of the main failure modes and response characteristics of the brick-mortar interfaces. The results show that the shear strength of wet triplets was about 20% lower on average than of those in dry conditions. Specimens provided with FRP sheets offered a higher strength enhancement than those with GFM. The strength increase using FRP was in the range of 16.6%-185.8% compared with the non-strengthened dry counterpart, depending on the laminate layout and normal stress level. In contrast, the strength increase using GFM, in conjunction with a mortar overlay, was typically less than 10% compared with the non-strengthened dry counterpart. A significantly higher strength contribution from both FRP and GFM was obtained for elements without pre-compression. Although the strength enhancement using GFM was generally modest, such strengthening is activated gradually leading to a relatively ductile interfacial behaviour in comparison with FRP. In order to provide further insights into the behaviour, complementary nonlinear numerical simulations are undertaken, using the key parameters obtained from the tests. The numerical models employ detailed surface-based cohesive-contact approaches, with due account for inelastic damage at the masonry interfaces, and damage-plasticity modelling for the constitutive response of brick materials. It is shown that the numerical approaches adopted are able to capture reliably the main behavioural characteristics and failure modes, and can therefore be employed for further numerical assessments.

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Section: Introductionmentioning

confidence: 99%

Experimental and numerical assessment of the shear behaviour of lime mortar clay brick masonry triplets

Bompa

Elghazouli

2020

Construction and Building Materials

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“…Total dissipated energy of 7804 kN-mm was displayed by CM_ST, i.e., 83.62% greatercompared to CM building. [14] It was observed that the in-plane shear competence of the wall with aspect ratio 1.0 raised with the rise in wideness of wall as of 120 mm to 240 mm. Also, the in-plane shear strength raised marginally (under 30%) whendeviation of 150 to 200 mm and 250 to 300 mmin the height of tie-column, respectively.…”

Section: Discussion O F R E S U Lt S O N T H E F I N D I N G Smentioning

confidence: 97%

“…Ajay Chourasia et.al. [14] performed an experimental study on seismic strengthening technique of confined masonry building using Plastic Cement Bag Mesh (PCBM). Strengthened confined masonry building (CM_ST) come out to be seismic resistant building for masonry buildings of low height to medium height.…”

Section: Experimental Findings Of Different Researchersmentioning

confidence: 99%

A Review On-Confined Masonry Construction

Chingakham¹,

Shijagurumayum²,

Thokchom³

2022

SMSJ

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Masonry structures are popularly built in many parts of India so it is necessary to provide suitable guidelines and safety rules for proper construction of masonry buildings.Confined masonry (CM) structures is appearing as anaccepted building construction technique in many earthquake-prone countries including India. India falls under four earthquake zones namely, zone II, zone III, zone IV and zone V. CMconstruction type has been known to perform well in numerousmajorseismic events, even though it started as an informal construction. This paper is a review of various experimental studies done by various researchers in India and around the world who studied and analyzed on seismic performance of CM buildings. This paper also gives summarized construction guidelines of CM construction and also gives a comparison of CM and reinforced concrete (RC) frame construction. This study shows that CM building construction if standardized in India, under proper guidance of engineers and building codes can prove to be a better alternative to seismic resistant masonry construction.

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“…Textile fibre reinforced mortars (TRM) embedded with masonry Brittle failure may be avoided A. Chourasia [19] welded wire mesh and plastic bag Compressive and flexural strength was 90-100% higher K. D. Theofanis [20] carbon textile fiber Delay in the crack initiation…”

Section: Xuan Wang [18]mentioning

confidence: 99%

An Assessment of Brick Masonry Strengthening Practice by Special Methods

Kanchidurai*¹,

Krishanan²,

Baskar³

2019

IJRTE

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This study aims to identify the best suitable method to enhance strength and the structural performance of masonry. There are different techniques available to strengthen the existing and new masonry structures. This paper deals the metal/mesh embedment in the masonry wall, strengthening by added different polymers and textile strips, masonry grout, engineered cementitious materials (ECC) and interlocking masonry method. The comparison of different unique masonry strengthening methods helps us to provide a better suggestion for construction issues. In contrast to the conventional method, welded wire mesh gives better results than all other ways. Also, embedment of TRM, ECC, FRP, GFRP, CFRP, and interlocking holds an excellent performance in some other aspects.

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Experimental investigation of seismic strengthening technique for confined masonry buildings

Cited by 26 publications

References 22 publications

Experimental and numerical assessment of the shear behaviour of lime mortar clay brick masonry triplets

Experimental and numerical assessment of the shear behaviour of lime mortar clay brick masonry triplets

A Review On-Confined Masonry Construction

An Assessment of Brick Masonry Strengthening Practice by Special Methods

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