Enhancing Performance of Infill Masonry With Skin reinforcement Subjected To Cyclic Load

Jebadurai, S. Vincent Sam; Tensing, D.; Christy, C. Freeda

doi:10.5829/ije.2019.32.02b.06

Cited by 3 publications

(3 citation statements)

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“…Utilizing Finite element method software, this study employs macro-modeling of masonry walls with the free mesh element to depict their quasi-brittle traits (19). The Willam-Warnke failure criterion, which is frequently employed, takes into account both cracking and crushing.…”

Section: Materials Methods and Modellingmentioning

confidence: 99%

“…The specimens are modeled by substituting a homogeneous material, with characteristic equations derived from Eurocode-8, for the actual material used in the model (17). Loading on masonry walls involves in-plane shear and out-of-plane bending, and to accurately model seismic behavior, both loadings are simultaneously applied in various aspect ratios on smaller-than-actual-sized specimens (18,19). Aspect ratios are noted to significantly impact masonry structure behavior.…”

Section: Introductionmentioning

confidence: 99%

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Flanges' Impact on Persian Historical Masonry Walls: Modeling Safety Factors

Ghamari,

Karimi,

Lourenço

et al. 2024

IJE

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This comprehensive study investigates the nuanced impact of flanges, height-to-length aspect ratios, wall thickness, and pre-compression levels on Persian historical masonry walls under uncertainty conditions. Numerical testing of 100 masonry wall specimens, varying across five lateral constraints (flanges), four height-to-length ratios, three wall thicknesses, and three pre-compression levels, was conducted. The study also examined the influence of uncertainty on the modulus of elasticity. Results demonstrated a substantial dependency of ultimate shear force (Fu), ultimate drift (δu/H), and effective stiffness (𝐾𝑒ff) on the considered variables. Fu and 𝐾𝑒ff increased with higher lateral constraints, wall thicknesses, and pre-compression levels, decreasing with reduced aspect ratios. Simultaneously, δu/H decreased with higher lateral constraints, wall thicknesses, and pre-compression levels, increasing with reduced aspect ratios. Estimated values for Fu ranged from 292.5 to 1357.4 MPa, δu/H spanned from 1.61 to 3.43, and 𝐾𝑒ff varied from 7.72 to 158.9 kN/mm. Proposed partial coefficients for partial coefficients (γM), displacement capacity (γdu), and effective stiffness (γk) were introduced through models incorporating uncertainty, revealing that increasing lateral constraints and wall thicknesses, and decreasing aspect ratios, led to heightened values for γM and γk and reduced values for γdu. With increasing pre-compression levels, all safety factors increased. The safety factors (γM: 1.18-1.96, γdu: 1.16-1.76, γk: 1.157-1.967) optimize Persian historical masonry structures, providing crucial insights for varied conditions were proposed.

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Section: Materials Methods and Modellingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Flanges' Impact on Persian Historical Masonry Walls: Modeling Safety Factors

Ghamari,

Karimi,

Lourenço

et al. 2024

IJE

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“…Strut and tie models (STM) were proposed to evaluate the mode of failure and loading capacity of members [15,16]. The most recent study on RC portal frames subjected to lateral and cyclic loads was done by Gunasekaran and Choudhury [17].…”

Section: B Reinforced Cement Concretementioning

confidence: 99%

Stress-Strain Characteristics of Reactive Powder Concrete Under Cyclic Loading

Dhundasi¹,

Khadirnaikar²,

Momin

2022

IJE

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Reactive powder concrete (RPC) is a type of ultra-high strength cement composite material. It has advanced mechanical properties and shows high ductility characteristics. Many researches have shown that normal and high strength concrete fails under cyclic stresses at load level below its static capacity.In the present study, the mix design guidelines to produce high strength RPC is provided. RPC with compressive strength of 120, 130 and 140MPa was produced. The mechanical properties are obtained for hardened concrete. The present study focuses on the investigation of reactive powder concrete under uniaxial compressive cyclic loading. The investigation was carried out on cubical and cylindrical specimens. The behaviour of RPC under cylic loads is studied by obtaining the stress-strain characteristics under monotonic loading and cyclic loading. Three main types of tests were performed. Stress-strain envelope curve, common point curve and stability point curves were established under repeated load cycles. The limiting stress values required for design are provided. It was concluded that peak stress of the stability point curve could be regarded as the maximum permissible stress. A nonlinear analytical expression was proposed for the normalized stresses and strain which shows a precise fit with the experimental data. The expression will assist in predicting the cyclic response of concrete required for constructional applications.

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