Shear design procedure for reinforced normal and high-strength concrete beams using artificial neural networks. Part I: beams without stirrups

Cladera, A.; Bernat, Antonio Ricardo Marí

doi:10.1016/j.engstruct.2004.02.010

Cited by 129 publications

(64 citation statements)

References 5 publications

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“…This value is in accordance with experimental observations made by the authors [14][15][16][17]. In any case, the inclination of the cracks is affected by the longitudinal and transverse reinforcement ratios ρ and ρ w , respectively, which influence the strains state.…”

Section: Mechanical Model For Shear Capacity Of Slender Rc Elementssupporting

confidence: 77%

“…Since the neutral axis depth depends on the longitudinal reinforcement ratio, ρ, and on the modular ratio, α e = E s /E c , the higher the longitudinal reinforcement amount, the higher the shear resisted by the concrete chord. In addition, it is observed that v c depends also on the shear carried by the transverse reinforcement, v s , as was observed experimentally [14,26]. Figure 6.…”

Section: Compression Head Contribution (V C )mentioning

confidence: 50%

“…(9-10), but limiting the concrete compressive strength to 60 MPa for the elements without stirrups, as it has been previously shown that the shear strength of reinforced concrete beams without stirrups does not increase significantly for high-strength concrete beams due to the fracture of the aggregates [14,15]. For the test comparison carried out later in this paper, the mean concrete compressive strength, f cm , has been used in Eq.…”

Section: Contributing Component Final Simplified Dimensionless Expresmentioning

confidence: 99%

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Shear-flexural strength mechanical model for the design and assessment of reinforced concrete beams subjected to point or distributed loads

Bernat

Cladera

Bairán

et al. 2014

Front. Struct. Civ. Eng.

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Abstract:A mechanical model recently developed for the shear strength of slender reinforced concrete beams with and without shear reinforcement is presented and extended to elements with uniformly distributed loads, specially focusing on practical design and assessment in this paper. The shear strength is considered to be the sum of the shear transferred by the concrete compression chord, along the crack, due to residual tensile

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Section: Mechanical Model For Shear Capacity Of Slender Rc Elementssupporting

confidence: 77%

Section: Compression Head Contribution (V C )mentioning

confidence: 50%

Section: Contributing Component Final Simplified Dimensionless Expresmentioning

confidence: 99%

See 1 more Smart Citation

Shear-flexural strength mechanical model for the design and assessment of reinforced concrete beams subjected to point or distributed loads

Bernat

Cladera

Bairán

et al. 2014

Front. Struct. Civ. Eng.

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show abstract

“…Este hecho es de gran importancia, ya que numerosas formulaciones propuestas, al estar basadas en criterios empíricos u otras teorías, no cumplen estas limitaciones, obteniéndose resultados para el efecto de efecto de escala incompatibles con la termodinámica de los medios continuos. (54). Los datos analizados están a la disposición de los lectores solicitándolos a la dirección de cualquiera de los autores del artículo.…”

Section: Resultados Experimentales Y Fundamento Teóricounclassified

Evaluación de la carga de fallo por tracción diagonal en vigas de hormigón armado sin cercos a través del estudio del efecto de tamaño

Carmona

Ruiz

2015

Inf. constr.

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Evaluación de la carga de fallo por tracción diagonal en vigas de hormigón armado sin cercos a través del estudio del efecto de tamaño Assessment of diagonal-tension failure load in reinforced concrete beams without stirrups through the study of size effectEl presente trabajo propone una expresión para evaluar la carga de fallo por traccion diagonal en vigas de hormigón armado sin cercos. El estudio se fundamenta en resultados experimentales y en conceptos básicos de Mecánica de Fractura con el fin de analizar el efecto de tamaño. Se comprueba que la armadura longitudinal modifica el efecto de tamaño respecto al de elementos entallados sin armadura. Para cuantificar este efecto establecemos un modelo teórico que se contrasta con ensayos de vigas de hormigón armado. A partir del modelo propuesto se presenta una formulación para determinar la carga de fallo por tracción diagonal en vigas de hormigón sin cercos. Para facilitar la aplicación de la formulación se realizan una serie de simplificaciones y finalmente se obtiene una expresión en función de los parámetros convencionalmente utilizados en el diseño de estructuras de hormigón.

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“…It can be classified as compression, flexure and shear where crack formations form depending on its failure mode. To investigate different structural members and its mode of failure, ANN were used in studies that showed good agreement with experimental tests [54][55][56][57][58][59][60][61][62][63].…”

Section: Damage Assessment In Reinforced Concretementioning

confidence: 99%

Investigation on the Sensitivity of Ultrasonic Test Applied to Reinforced Concrete Beams Using Neural Network

2018

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An experiment on reinforced concrete beams using four-point bending test during an ultrasonic test was conducted. Three beam specimens were considered for each water/cement ratio (WC) of 40% and 60%, with three reinforcement schedules named design A (comprising two top bars and two bottom bars), design B (with two bottom bars), and design C (with one bottom bar). The concrete beam had a size of 100 mm × 100 mm × 400 mm in length with a plain reinforcement bar of 9 mm in diameter. An ultrasonic test with pitch-catch configuration was conducted at each loading with the transducers oriented in direct transmission across the beams' length with recordings of 68 datasets per beam specimen. Recordings of ultrasonic test results and strains at the top and bottom surfaces subjected to multiple step loads in the experiment were done. After the collection of the data, feed-forward backpropagation artificial neural network (ANN) was used to investigate the sensitivity of the ultrasonic parameters to the mechanical load applied. Five input parameters were examined, as follows: neutral axis (NA), fundamental harmonic amplitude (A1), second harmonic amplitude (A2), third harmonic amplitude (A3), and peak-to-peak amplitude (PPA), while the output parameter was the percentage of ultimate load. Optimum models were chosen after training, validating, and testing 60 ANN models. The optimum model was chosen on the basis of the highest Pearson's Correlation Coefficient (R) and soundness, confirming that it exhibited good behavior in agreement with theories. A classification of sensitivity was performed using simulations based on the developed optimum models. It was found that A2 and NA were sensitive to all WC and reinforcements used in the ANN simulation. In addition, the range of sensitivity of A2 and NA was inversely and directly proportional to the reinforcing bars, respectively. This study can be used as a guide in the selection of ultrasonic parameters to assess damage in concrete with low or high WC and varying reinforcement content.

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Shear design procedure for reinforced normal and high-strength concrete beams using artificial neural networks. Part I: beams without stirrups

Cited by 129 publications

References 5 publications

Shear-flexural strength mechanical model for the design and assessment of reinforced concrete beams subjected to point or distributed loads

Shear-flexural strength mechanical model for the design and assessment of reinforced concrete beams subjected to point or distributed loads

Evaluación de la carga de fallo por tracción diagonal en vigas de hormigón armado sin cercos a través del estudio del efecto de tamaño

Investigation on the Sensitivity of Ultrasonic Test Applied to Reinforced Concrete Beams Using Neural Network

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