Span-to-depth ratio limits for RC continuous beams and slabs based on MC2010 and EC2 ductility and deflection requirements

Santos, José; Henriques, António Abel

doi:10.1016/j.engstruct.2020.111565

Cited by 11 publications

(6 citation statements)

References 31 publications

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“…The influence of the superior or inferior steel rebars (reinforcement) ratio in RC slabs on the "global dynamic performance of the structures" [27][28], "shear strength" [29][30], and "ductility requirements" [31] through "experimental investigations and analytical calculations" [29] of the "flexural reinforcement type and ratio effect" [32] is insignificant (see Figure 9). However, the rigid diaphragm effect of RC slabs is validated, but in both research situations (with different steel reinforcement ratio), they (RC slabs) present a "non-linear mechanical model" [33].…”

Section: Global Analytical Results Regarding Pushover Analysesmentioning

confidence: 99%

Influence of the longitudinal steel ration in RC beams and steel reinforcement ration in RC slabs on the seismic energy dissipation mechanisms for a MR RC frame structure

Sococol

Petrescu

Mihai

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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The MR RC frame structures present a special engineering interest regarding the practical mode of ductile seismic response, through plastic hinges formation in specially designed RC beams end areas and inferior zones of the RC columns from the ground floor. Thus, it was proposed to verify the capacity design concept for this structural system type through seismic response observation of the optimal MR RC frame model. Until this objective is achieved, it was proposed to perform a complex analytical study, which has as finality the current research paper. Thus, in the previous analytical studies the influence of the concrete strength class, the influence of the longitudinal steel reinforcement ratio in RC columns and influence of the RC beams cross sections on the local and global seismic response for a group of RC frame models were analysed. In these conditions, the present paper contains the results obtained in previous research papers and concludes the current analytical study through the observation of the effectiveness of the inferior longitudinal steel reinforcement ratio in the RC beams on the cracking mode, in potentially plastic areas. Finally, it was specified that the K_7 RC frame model represents the optimal structural system for the experimental test.

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Section: Global Analytical Results Regarding Pushover Analysesmentioning

confidence: 99%

Influence of the longitudinal steel ration in RC beams and steel reinforcement ration in RC slabs on the seismic energy dissipation mechanisms for a MR RC frame structure

Sococol

Petrescu

Mihai

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

View full text Add to dashboard Cite

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“…To analyze the ductility of RC beams before and after reinforcement, the displacement ductility coefficient was calculated according to Equation (15) (Santos and Henriques, 2021).…”

Section: Ductility Calculation Methodsmentioning

confidence: 99%

“…To analyze the ductility of RC beams before and after reinforcement, the displacement ductility coefficient was calculated according to Equation (15) (Santos and Henriques, 2021). where μ was the displacement ductility coefficient of RC beam; Δ was a variety of parameters related to the displacement of RC beam, such as strain, section curvature, angle or displacement, etc., displacement was adopted in this paper.…”

Section: Methodsmentioning

confidence: 99%

Flexural behavior of RC beams reinforced by ECC layer and steel plate: numerical simulation

Liu,

Wang,

Xiao

2024

IJSI

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PurposeThe combination of an Engineered Cementitious Composite (ECC) layer and steel plate to reinforce RC beams (ESRB) is a new strengthening method. The ESRB was proposed based on the steel plate at the bottom of RC beams, aiming to solve the problem of over-reinforced RC beams and improve the bearing capacity of RC beams without affecting their ductility.Design/methodology/approachIn this paper, the finite element model of ESRB was established by ABAQUS. The results were compared with the experimental results of ESRB in previous studies and the reliability of the finite element model was verified. On this basis, parameters such as the width of the steel plate, thickness of the ECC layer, damage degree of the original beam and cross-sectional area of longitudinal tensile rebar were analyzed by the verified finite element model. Based on the load–deflection curve of ESRB, ESRB was discussed in terms of ultimate bearing capacity and ductility.FindingsThe results demonstrate that when the width of the steel plate increases, the ultimate load of ESRB increases to 133.22 kN by 11.58% as well as the ductility index increases to 2.39. With the increase of the damage degree of the original beam, the ultimate load of ESRB decreases by 23.7%–91.09 kN and the ductility index decreases to 1.90. With the enhancement of the cross-sectional area of longitudinal tensile rebar, the ultimate bearing capacity of ESRB increases to 126.75 kN by 6.2% and the ductility index elevates to 2.30. Finally, a calculation model for predicting the flexural capacity of ESRB is proposed. The calculated results of the model are in line with the experimental results.Originality/valueBased on the comparative analysis of the test results and numerical simulation results of 11 test beams, this investigation verified the accuracy and reliability of the finite element simulation from the aspects of load–deflection curve, characteristic load and failure mode. Furthermore, based on load–deflection curve, the effects of steel plate width, ECC layer thickness, damage degree of the original beam and cross-sectional area of longitudinal tensile rebar on the ultimate bearing capacity and ductility of ESRB were discussed. Finally, a simplified method was put forward to further verify the effectiveness of ESRB through analytical calculation.

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“…Günümüzde, basit bir betonarme yapının tasarımı, birçok kısıt ve parametrelere bağımlı olarak gerçekleştirilir, bu nedenle bilgisayar kullanımı artık neredeyse zorunludur. Bu bağlamda, yapı mühendislerinden, basitleştirilmiş tasarım yöntemlerine olan talep, en azından betonarme elemanlarının ön tasarımı için artmıştır [3]. Yapısal optimizasyon alanında önemli sayıda araştırmalar yapılmış olup, büyük çoğunluğu akademik veya küçük problemlerle ilgilidir.…”

Section: Introductionunclassified

Ayrık PSO Algoritması ile Sehim Kısıtı Altında İki Doğrultudaki Kirişli Döşemelerin Güvenilirlik Tabanlı Optimizasyonu

DERDİMAN>¹

2021

El-Cezeri Fen Ve Mühendislik Dergisi

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Optimizasyon geliştirilen bilgi teknolojilerinin sonucu olarak mühendislik tasarımlarının en önemli konusu haline gelmiştir. Tasarım gereklilikleri ve koşullarını sağlayan çok sayıda alternatif arasından optimum değerlerin belirlenmesi yapı mühendisliği için de önemli bir problemdir. İki doğrultuda çalışan döşemelerde döşemenin sehim sınırlarını aşmadan TS500 taşıma gücü kriterlerini sağlayacak çok sayıda alternatif çözümü mevcuttur. Bu alternatifler arasından en yararlı ve ekonomik olanın seçilmesi gereklidir. Eğer optimal tasarıma ilişkin bir kriter ortaya konulursa bu tasarımcı için önemli bir yol gösterici olacaktır. Meta sezgisel optimizsyon teknikleri arasında önemli bir yere sahip olan parçacık sürü optimizasyon (PSO) algoritması popülasyon tabanlı arama algoritmalarından olup kullanımı oldukça yaygındır. Bu çalışmada PSO algoritması ayrık optimizasyon yapacak şekilde modifiye edilerek, iki doğrultuda çalışan ve değişen boyutlara sahip kirişli döşemelerin kısıtlar altında optimizasyon işlemi yapılmıştır. Optimizasyon işleminde TS500 şartları, taşıma gücü ve deplasman kriterleri kısıt olarak tanımlanmış, bu amaçla artan kısa kenar (2.2-8.6 m) ve değişen m (Lu/Lk) değerleri ile farklı döşeme tipleri için modeller kurgulanmıştır. Seçilecek kesit ve donatının güvenilirlik tabanlı optimizasyonu yapılmıştır. Çalışmada toplam 5236 model analiz edilmiştir. Çözümleme sonucunda farklı döşemeler için optimal tasarım değerleri belirlenmiştir.

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Span-to-depth ratio limits for RC continuous beams and slabs based on MC2010 and EC2 ductility and deflection requirements

Cited by 11 publications

References 31 publications

Influence of the longitudinal steel ration in RC beams and steel reinforcement ration in RC slabs on the seismic energy dissipation mechanisms for a MR RC frame structure

Influence of the longitudinal steel ration in RC beams and steel reinforcement ration in RC slabs on the seismic energy dissipation mechanisms for a MR RC frame structure

Flexural behavior of RC beams reinforced by ECC layer and steel plate: numerical simulation

Ayrık PSO Algoritması ile Sehim Kısıtı Altında İki Doğrultudaki Kirişli Döşemelerin Güvenilirlik Tabanlı Optimizasyonu

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