Proposed analysis model for infilled reinforced concrete frames

Dautaj, Arton; Kabashi, Naser

doi:10.1680/jstbu.17.00155

Cited by 5 publications

(4 citation statements)

References 15 publications

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“…Two single bay one-story frame structure specimens (Figure 1) tested by Dautaj & Kabashi (2019) were nonlinearly analyzed under pushover load. The PH length 𝑙 𝑃 was estimated ten alternative equations selected from the review (section 2).…”

Section: Case Of Studymentioning

confidence: 99%

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Flexural Plastic Hinge Length for Reinforced Concrete Frames

Sayed Abd-Allah,

El-Assaly,

EL-KHOLY

2024

Fayoum University Journal of Engineering

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The flexural plastic hinge (PH) length is a critical parameter for reinforced concrete (RC) frames subjected to lateral load. In this work, a review of past studies for introducing empirical equations for estimating the flexural PH length (lp) of RC frames was introduced. Another key aspect explored in this paper is to study the effect of different available lp equations on the overall nonlinear structural response of RC frames. Therefore, ten lp equations were selected from this review for simulating the nonlinear behavior of two RC frames with available experimental data. Each frame was analyzed ten times with alternative lp values under pushover analysis using SAP2000 software. The two modeled frames displayed an average error ranging from 12.3% to 23% in the ultimate lateral load, and a deviation ranging from -30.4% to 20.1% in the initial lateral stiffness. These errors indicated that the accuracy of predicting the behavior of RC frames is highly dependent on the chosen lp equation. Finally, the proper lp equation which could represent the nonlinear behavior of RC frames accurately was recommended.

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Section: Case Of Studymentioning

confidence: 99%

“…Figure 6. Lateral response of model 1 using the ten 𝑙𝑝 equations versus experiment(Dautaj & Kabashi, 2019) …”

mentioning

confidence: 99%

Flexural Plastic Hinge Length for Reinforced Concrete Frames

Sayed Abd-Allah,

El-Assaly,

EL-KHOLY

2024

Fayoum University Journal of Engineering

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“…As reported by Crisafuli (1997), Baushinger was the first to conduct tests investigating the strength of masonry subjected to shear forces. The simplest such test is the direct shear test on a masonry prism built with a small number of masonry units, as seen in Fig.…”

Section: Introductionmentioning

confidence: 99%

“…There are currently two models for the mechanism of masonry shear failure: a friction-based hypothesis and a crack-based hypothesis. The model for determining the shear strength based on friction theory is currently accepted by Eurocode 6 (Crisafuli 1997;Morton 2012;Smith and Carter 1969;Tomazevic 1999;Comite Euro-International Du Beton 1994). According to this model, the shear strength of masonry under shear force is defined as the sum of the shear strength under zero compressive stresses, Eq.…”

Section: Introductionmentioning

confidence: 99%

Shear resistance of masonry panel in infilled RC frames

Dautaj

Muriqi

Krasniqi

et al. 2019

Int J Adv Struct Eng

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The shear capacity of masonry-infilled reinforced concrete (RC) frames is determined experimentally by testing of five 2/3 scale, one story, one bay infilled RC frame specimens with varying degrees of separation between upper and lower portions of the masonry infill panel. The main premise of this experimental study was to find the contribution of masonry panel in global resistance of infilled RC frames versus shear force. Based on the experimental results, a new method is proposed for the determination of the shear resistance and the contribution of the masonry infill panel is derived. Comparisons of experimental and analytical results show that the proposed method for evaluating the shear resistance of the masonry panels offers a promising approach for the design of infilled RC frames. Furthermore, the results of this study indicate that the shear resistance of masonry panel in infilled RC frames is strongly influenced by the stiffness and lateral resistance of the RC frame.

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Nonlinear macromodeling of multistory RC buildings with masonry infill walls

El-Kholy,

Sayed,

El-Assaly

2023

Bull Earthquake Eng

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The structural behavior prediction of the multistory reinforced concrete (RC) buildings with masonry infill walls (MIWs) during earthquakes is challenging. This paper presents a nonlinear macromodeling strategy seeking a simple, reliable, and low-cost computational analysis of the multistory RC buildings that comprise MIWs, and that use frames or shear walls (SWs) for resisting the lateral load. The strategy employed four plastic hinge (PH) models for tracking the deformations (flexural, shear, and torsion) of the frame elements and joints, a multilinear plastic link for modeling the MIW, and a nonlinear multilayer shell element for modeling the SW. A flexural PH model characterized by discretization into fibers, a recommended position, and an iterative estimating for the PH length using a distinct formula for each loading level was proposed. This strategy was validated through eleven macromodels investigating four bare frames, four MIWs frames, and a SW where the average ultimate lateral load error was 9.2%, 3.6%, and 0.4%, respectively. Finally, the structural behavior of real ten-story buildings with/without MIWs was investigated. The results showed that the MIWs increased the shear capacity and the lateral stiffness with an average of 44.3% and 118.6%, respectively. Also, both the frames buildings with MIWs and the bare SWs buildings showed approximately equal lateral load capacities. Local damages in the RC vertical elements and yielding of the MIWs were recorded simultaneously. However, the MIWs yielding (and also failure) occurred earlier for the frames buildings compared with the SWs buildings in which the stress was relaxed in their MIWs.

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Proposed analysis model for infilled reinforced concrete frames

Cited by 5 publications

References 15 publications

Flexural Plastic Hinge Length for Reinforced Concrete Frames

Flexural Plastic Hinge Length for Reinforced Concrete Frames

Shear resistance of masonry panel in infilled RC frames

Nonlinear macromodeling of multistory RC buildings with masonry infill walls

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