Reinforced concrete ribbed slabs with wide-beam

Sacramento, Paulo; Picanço, Marcelo S.; Oliveira, Dênio Ramam Carvalho de

doi:10.1590/s1983-41952018000500005

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…Experimental studies such as those by Al-Bayati et al [1], [2], Arunkumar et al [3] and Sacramento et al [4] showed that the reduction of the solid area in waffle flat slabs can reduce their ultimate strength, leading to the punching shear cone extending beyond the solid area. There is a rule of thumb among designers to use the length of the solid area to be at least equal to 15% of the clear span between columns, but there is no scientific basis for this rule.…”

Section: Justificationmentioning

confidence: 99%

“…Al-Bayati et al [1], [2], Arunkumar et al [3] and Sacramento et al [4] observed that some tested waffle slabs had their strength reduced when the punching shear cone reached the ribbed region. That is, in order to avoid a bearing capacity reduction of the slab, it is of fundamental importance that the punching shear cone is located within the solid area of the slab.…”

Section: Introductionmentioning

confidence: 99%

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Punching shear strength of waffle flat slabs

Silva

Oliveira

Albuquerque

et al. 2021

Rev. IBRACON Estrut. Mater.

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This research aimed to compare the ultimate load of 10 waffle flat slabs with different sizes of solid area and spacing between ribs. For this, a non-linear computational simulation of the slabs was carried out until their failure using the engineering software ANSYS. The failure modes and loads were analyzed, and the results showed that the models with less solid area presented less bearing capacity in comparison to the models with greater solid area when the failure mode was shearing of the ribs. The slabs with the largest solid regions experienced punching shear and behaved in a similar way as solid flat slabs, indicating compliance with the codes in relation to their punching shear strength provisions, especially with the NBR 6118. The results show that a square solid area whose length is 15% of the span is reasonable and that the ACI, Eurocode 2 and NBR 6118 provisions underestimate the shear strength of the ribs.

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Section: Justificationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Punching shear strength of waffle flat slabs

Silva

Oliveira

Albuquerque

et al. 2021

Rev. IBRACON Estrut. Mater.

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“…Ribbed and waffle slab types have many advantages. Due to the presence of voids in these slabs, the dead weight will decrease; consequently, the concrete below the neutral axis will also decrease [17]. Yet, both of these slab types have disadvantages when employed in seismic areas since they exhibit low rigidity and ductility [18].…”

Section: Introductionmentioning

confidence: 99%

Effects of Slab Types on the Seismic Behavior and Construction Cost of RC Buildings

Tunç

AZİZİ

TANFENER³

2023

Politeknik Dergisi

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Comparative study of finite element methods of calculation of ribbed reinforced concrete floors

Nikitin

Kirsanov²

2022

Struct. Mech. of Eng. Const. and Build

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The paper presents the results of a comparative study of several finite element models of ribbed reinforced concrete solid floors. Using the example of a solid slab with infrequent ribs arranged along a grid of columns, three models frequently used in computational practice are analyzed. Those models include both rods and thin-walled elements. In the first model, the plate and its ribs are considered separately, within the framework of the decomposition scheme of the structure. The second model contains plate finite elements and the rod finite elements of the ribs connected to each other. The third model consists entirely of thin-walled finite elements that model both the plate and the floor ribs. The ribbed floor is also considered in the formulation of the problem within the framework of the theory of elasticity. The floor is represented in the form of rigidly connected solid bodies of ribs and plates. Reinforcement rods inside the concrete massive are included in the model as separate solid bodies. This model serves as a benchmark for assessing the accuracy of the obtained results. Its calculation is performed in the FEM application Ansys. The paper compares the results of calculations performed using various models. A conclusion is made about the accuracy of the obtained results. A significant difference between the proposed work and similar studies devoted to the selection of the best design schemes of ribbed slab of floor is the consideration of the influence of reinforcement on the behavior of the structure.

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Reinforced concrete ribbed slabs with wide-beam

Cited by 3 publications

References 5 publications

Punching shear strength of waffle flat slabs

Punching shear strength of waffle flat slabs

Effects of Slab Types on the Seismic Behavior and Construction Cost of RC Buildings

Comparative study of finite element methods of calculation of ribbed reinforced concrete floors

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