Punching shear code provisions examination against the creation of an opening in existed RC flat slab of various sizes and locations

Al-Rousan, Rajai Z.; Alnemrawi, Bara’a R.

doi:10.1016/j.istruc.2023.02.007

Cited by 12 publications

(3 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To inspect the critical opening location and the control shear perimeter, Al-Rousan and Alnemrawi [46] investigated a variety of code rules about shear resistance in RC two-way flat slabs without using shear reinforcement. The impact of various opening sizes and locations on twenty-one simulated models was investigated using a nonlinear finite element evaluation conducted using ABAQUS 2020 software.…”

Section: Impact Of Opening On Strength Of Flat Slabsmentioning

confidence: 99%

Reduced Volume Approach to Evaluate Biaxial Bubbled Slabs’ Resistance to Punching Shear

Oukaili,

Merie,

Allawi

et al. 2024

Buildings

View full text Add to dashboard Cite

The bubbled slab, a type of reinforced concrete (RC) slab with plastic voids, is an innovative design that employs a biaxial distribution of voiding formers within the slab to reduce the slab’s self-weight while preserving a load-carrying capacity that is approximately comparable to that of solid slabs. This paper presents a new approach for figuring out the effective critical shear perimeter of voided slabs using the reduced-volume concept of concrete. This approach aims to reduce the coefficient of variation of the current design standards, namely the ACI 318-19 and Eurocode 2, for assessing the slabs’ resistance to punching shear. Our experimental program investigated the impact of voiding former patterns and the location of an opening near a column on the punching shear resistance of biaxial hollow slabs. The factors under consideration included the opening’s size, location, and distance from the loaded area, as well as the voiding formers’ placement concerning the critical shear boundaries. The results of experiments on 10 full-scale, 2000 × 2000 × 230 mm, reinforced concrete biaxial voided slabs with an opening are presented in this study. Two design expressions were used to estimate the biaxial hollow slabs’ shear strength. These expressions take into account the reduced volume of concrete and the distribution of voiding formers up to the section 4d from the periphery of the column. The proposed approach to determine the effective punching shear perimeter has the lowest coefficient of variation among the methods suggested by these standards. This indicates the validity of our proposed expressions. The coefficient of variation of the proposed expressions does not exceed 0.057.

show abstract

Section: Impact Of Opening On Strength Of Flat Slabsmentioning

confidence: 99%

Reduced Volume Approach to Evaluate Biaxial Bubbled Slabs’ Resistance to Punching Shear

Oukaili,

Merie,

Allawi

et al. 2024

Buildings

View full text Add to dashboard Cite

show abstract

“…Slab failures in buildings, bridges, and other structures can occur for a variety of reasons. For instance, punching shear failure can occur in a conical shape, which causes a slab to dramatically collapse progressively after the induced load is redistributed, and consequent overloading the various structural elements within the system [ 2 , 3 ]. Also, several factors influence the flexural performance of RC slabs, including structural element size, cement, aggregate, moisture level, and ambient environmental conditions [ [4] , [5] , [6] ].…”

Section: Introductionmentioning

confidence: 99%

Structural retrofitting of RC slabs using bamboo fibre laminate: Flexural performance and crack patterns

Awoyera,

Althoey,

Bahrami

et al. 2024

Heliyon

View full text Add to dashboard Cite

“…Furthermore, this study aims to develop and compare finite-element method (FEM) simulations with ML models for predicting PSS. FEM, a widely used computational technique in structural engineering, has long been employed for analysing complex physical phenomena [16][17][18][19]. By contrasting these computational approaches, this research intends to offer valuable insights into the advantages and disadvantages of each method and identify the most suitable technique for practical applications.…”

Section: Introductionmentioning

confidence: 99%

Low-Code Application and Practical Implications of Common Machine Learning Models for Predicting Punching Shear Strength of Concrete Reinforced Slabs

Nguyen,

Do,

Nguyen

et al. 2023

Advances in Civil Engineering

View full text Add to dashboard Cite

This paper investigates the effectiveness of machine learning (ML) models available in MATLAB Regression Learner app and MATLAB App Designer, both low-code applications, for accurately predicting punching shear strength (PSS) in reinforced concrete (RC) slabs. A database of 379 RC slab samples without transverse reinforcement was compiled from renowned publications. RandomSearch and Bayesian optimisation were employed for tuning hyperparameters. The performance of these models was compared with six empirical models, which included three current design codes, three equations from other researchers, and 227 finite-element simulations conducted by the authors. The ML models and finite-element method (FEM) demonstrated superior performance compared with the literature and practical codes. Furthermore, the results emphasised the exceptional performance of the Gaussian process regression (GPR) with optimised hyperparameters, exhibiting the best performance in validation, training, and testing datasets with R2 values of 0.95, 0.99, and 0.98, respectively. A user-friendly standalone application was developed, providing real-time predictions of the PSS using the two best-developed ML models, GPR and support vector machine (SVM), as well as six empirical models from the literature. This tool offers users flexibility in choosing the most appropriate model for their specific needs, delivering reliable, and accurate results for estimating the PSS of RC slabs.

show abstract

Punching shear code provisions examination against the creation of an opening in existed RC flat slab of various sizes and locations

Cited by 12 publications

References 30 publications

Reduced Volume Approach to Evaluate Biaxial Bubbled Slabs’ Resistance to Punching Shear

Reduced Volume Approach to Evaluate Biaxial Bubbled Slabs’ Resistance to Punching Shear

Structural retrofitting of RC slabs using bamboo fibre laminate: Flexural performance and crack patterns

Low-Code Application and Practical Implications of Common Machine Learning Models for Predicting Punching Shear Strength of Concrete Reinforced Slabs

Contact Info

Product

Resources

About