Behavior and strength of hidden Rc beams embedded in slabs

Özbek, Eray; Aykaç, Bengi; Bocek, Meryem; Yılmaz, Murat; Mohammed, Ashiq; Er, Şule Bakirci; Aykaç, Sabahattin

doi:10.1016/j.jobe.2019.101130

Cited by 6 publications

(5 citation statements)

References 8 publications

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“…There is no strict rule to determine the width of flat beams wide-shallow beams (WSBs). A ratio b/d > 2 is suggested in [42] but, depending on the country, b/h values can be as high as 4-to-5 [43]. Regarding shear performance, values of b/d ≤ 3 are suggested in [44,45].…”

Section: Flat Beams and Wide-shallow Beamsmentioning

confidence: 99%

A Parametric Study to Assess Lightweight Aggregate Concrete for Future Sustainable Construction of Reinforced Concrete Beams

et al. 2021

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Lightweight aggregate concrete (LWC) is an attractive alternative to conventional concrete in building construction. It leads to lighter self-weight in beams and floor slabs and thus might have a positive impact on reinforcing steel consumption, also reducing the loads withstood by columns and foundations. However, LWC may increase cement consumption to maintain the required concrete compressive strength. This study presents compact equations for the design of reinforced LWC beams and subsequently applies them to a parametric analysis programmed in MATLAB. The aim of this analysis is to obtain an estimation of the equivalent carbon dioxide emissions associated with steel and cement consumption if using LWC instead of conventional concrete. The analysis involves more than 3 million beams simulating real scenarios by varying different design parameters, such as mix design, concrete strength, span length and applied loads and verifying both Ultimate and Serviceability Limit States. Whereas LWC of density equal or below 1600 kg/m3 does not seem to be feasible when trying adequately control cement content, the study shows that LWC with densities of 1800 and 2000 kg/m3 would not have a negative impact on the carbon dioxide emissions and would adequately comply with the various design restrictions.

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Section: Flat Beams and Wide-shallow Beamsmentioning

confidence: 99%

A Parametric Study to Assess Lightweight Aggregate Concrete for Future Sustainable Construction of Reinforced Concrete Beams

et al. 2021

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“…An experimental investigation that serves as a comparison between wide beams and conventional beams was conducted on fourteen specimens. As the depth of the wide beam increased, its behavior shifted to that of the conventional beam [5]. Two wide beam specimens were designed according to Eurocode 2 and the other according to the Saudi code of practice; 0.6 d was the most effective longitudinal spacing between the stirrups [6].…”

Section: Introductionmentioning

confidence: 99%

The Impact of Aspect Ratio, Characteristic Strength and Compression Rebars on the Shear Capacity of Shallow RC Beams

Soliman,

Mansour,

Khalil

et al. 2023

Civ Eng J

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This paper investigates the impact of the aspect ratio, the characteristics strength of the concrete, and the compression steel ratio on the shear capacity of wide-shallow beams. An experimental program consists of seven specimens, including a control specimen, all tested under a three-point load test. Three specimens were considered for each parameter (the control specimen was included in all three variables). The experimental results were compared to the theoretical values of six different codes of practice; they were also analyzed to determine the ductility, stiffness, and dissipated energy of each specimen. The results indicated that the shear reinforcement was fully functioning until it yielded, with a minimum contribution of 55% of the total shear capacity of the specimens. The aspect ratio and the characteristic strength had a notable impact on the shear capacity of the specimens, while the compression steel ratio had a minor effect on the shear capacity, but it improved the stiffness and the ductility of the beams. Theoretical concrete shear strengths from design codes ranged between 77 and 163% of the experimental values; EN-1992 was the closest code to the experimental results. A comparison between the experimental results and predicted values using GP and EPR methods from previous research showed accuracies of 72% and 81%, respectively. Doi: 10.28991/CEJ-2023-09-09-012 Full Text: PDF

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“…Navyashree and Sahana [3] demonstrated that the hidden beam structures present up to three times more drift than drop beam buildings. This is largely expected in hidden beam floor systems because it has lower lateral stiffness than drop beam frames [4,5]. A comparative study conducted by [4]], where performance-based analysis of solid slabs on drop beams, ribbed slabs on shallow (hidden) beams, and flat plates with or without drop panels, showed that models with drop beams offer enough mechanical properties to overcome lateral loads.…”

Section: Introductionmentioning

confidence: 99%

“…A comparative study conducted by [4]], where performance-based analysis of solid slabs on drop beams, ribbed slabs on shallow (hidden) beams, and flat plates with or without drop panels, showed that models with drop beams offer enough mechanical properties to overcome lateral loads. An experimental study reported a comparison of flexural strength and deflection of hidden and drop beams [5].…”

Section: Introductionmentioning

confidence: 99%

Comparative analysis of the seismic behavior of low-rise buildings with hidden and drop beams

Zúñiga-Olvera¹,

Valverde-Burneo²,

García-Troncoso³

et al. 2023

Proceedings of the 21th LACCEI International Multi-Conference for Engineering, Education and Technology (LACCEI 2023): “Leaders

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This study presents a comparative analysis of two structural design concepts in the Ecuadorian construction market: hidden vs. drop beams. Typical structural systems used in low-rise buildings are special-moment frames, with either hidden or drop beams. The former is preferred by contractors and builders due to a notion of affordability, despite strong evidence of such system collapsing during recent earthquake events, particularly the April 2016 Ecuador earthquake (M7.8). This comparative analysis spans the mechanical, seismic, and economical aspects. A total of 32 structural models are developed and analyzed for linear and nonlinear static and dynamic response. Sixteen of these models are structures containing hidden beams, and the remaining 16 contain drop beams. The results show that structures with drop beams have no significant cost differences with hidden beams, while achieving a noticeable better structural behavior in high-risk seismic zones. The research gap that the present work aims to fill is a noticeable lack of previous studies comparing these two construction systems.

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Behavior and strength of hidden Rc beams embedded in slabs

Cited by 6 publications

References 8 publications

A Parametric Study to Assess Lightweight Aggregate Concrete for Future Sustainable Construction of Reinforced Concrete Beams

A Parametric Study to Assess Lightweight Aggregate Concrete for Future Sustainable Construction of Reinforced Concrete Beams

The Impact of Aspect Ratio, Characteristic Strength and Compression Rebars on the Shear Capacity of Shallow RC Beams

Comparative analysis of the seismic behavior of low-rise buildings with hidden and drop beams

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