Punching behavior of BubbleDeck type reinforced concrete slabs

Nicácio, Wanderley Gustavo; Barros, Joaquim A. O.; Melo, Guilherme S.

doi:10.1002/suco.201900176

Cited by 7 publications

(3 citation statements)

References 14 publications

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“…• When the load is up to 61% to 95% of the punching failure load, the curves illustrate the case of gradually decreasing compressive strain on concrete leading toward failure. These findings match with punching tests using flat RC slabs reported by other authors [28,29]. Tensile strains can be noticed shortly before punching.…”

supporting

confidence: 92%

Effectiveness of Limestone Powder as a Partial Replacement of Cement on the Punching Shear Behavior of Normal- and High-Strength Concrete Flat Slabs

Mohammed,

Al-Numan

2024

Sustainability

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The objective of this study is to investigate the performance of normal- and high-strength concretes including limestone powder (LP) through their mechanical properties. Moreover, sustainable flat plates made of these concretes were investigated through their punching strength. For this purpose, two different types of concrete (normal- and high-strength) with various limestone replacement ratios of 0%, 5%, 15%, and 20% by weight were designed. The fresh and hardened characteristics of the mixtures were investigated at various ages. By this means, the experimental behavior of reinforced concrete (RC) flat plate slabs made with limestone powder subjected to punching shear failure was studied. Slump value increased up to a 5% replacement of LP; after that, there was a tendency for the slump value to decrease as the replacement of limestone in normal-strength LP concrete increased. However, slump values for high-strength LP concrete increased as the LP replacement amount increased. There was a steady decrease in the compressive strength and splitting tensile strength values with the increase in LP content in normal concrete. However, in the high-strength LP concrete, with more than 10% of replacement LP, a decrease in the compressive strength values and splitting tensile strength values occurred. Compared to the control slab specimen without LP, in normal strength, the slab specimens with LP exhibit a larger ultimate shear load for slab specimens containing 5% and 10% of LP. The maximum increment for RC slabs containing 10% limestone powder was 3.8%. However, in high-strength concrete, the slab specimens with LP remained at the same ultimate shear load as control slabs, up to 10% of LP. high-strength concrete slabs with 5–20% LP showed an overall increase of (17.2%) in punching strength over the corresponding LP normal-strength concrete slabs. The corresponding increase for control slabs was 18.8%. It can be concluded that introducing LP improves the slab punching strength in a similar way that is found in non-sustainable slabs when using either normal- or high-strength concrete.

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supporting

confidence: 92%

Effectiveness of Limestone Powder as a Partial Replacement of Cement on the Punching Shear Behavior of Normal- and High-Strength Concrete Flat Slabs

Mohammed,

Al-Numan

2024

Sustainability

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“…On the other hand, the insertion of trusses had contributed to an increase of 30% in comparison to the other slabs. However, the experiment generated overestimated results and the number of tests was not sufficient to obtain concrete results [8].…”

Section: Introductionmentioning

confidence: 96%

A Comparative with the Massive Slab Constructive System

Oliveira¹

2021

J Civ Eng Res Technol

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In view of the need for the implementation of new slab construction typologies, this study analyzed the feasibility of inserting BD230, BD285 and BD340 bubbledeck slabs with comparative materials used in the usual thickness of 10, 15 and 20 cm by CypeCAD software, and analyze the cost of implementation through cost compositions provided by SINAPI. The place chosen for the case study of this work was the municipality of Formiga, located in the west of Minas Gerais, Brazil in a slab with 241, 8m² surface. When checking the amount of inputs used, it was noted that in the bubbledeck system were superior to conventional slabs, besides the cost being higher, consequently making the implementation of this technology in this type of work.

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“…Previous and recent research studies of these types of slabs containing voiding elements concentrate mainly on global flexural [9,10] and the shear and punching behavior [11][12][13] of slabs, neglecting the "simple" transfer of forces by the joints. A relatively recent disaster in The Netherlands with a total collapse of a parking building showed the importance of the joints in global system behavior [14,15].…”

Section: Introductionmentioning

confidence: 99%

Structural Behavior of Floor Systems Made by Floor Plates—Mechanical Model Based on Test Results

Molkens

Gysel

2021

Applied Sciences

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In daily engineering practice, the execution of concrete slabs by the mean of precast floor plates is seen as a common and reliable way to create massive slabs. In the last few decades, however, there has been an evolution to flat slabs and other uses where important bending moments must be transferred over the joints between the floor plates. For this kind of application, there is a lack of knowledge and experimental evidence based on large-scale tests to define accurate failure and design models. In this work, a comprehensive overview is given of 20 large-scale tests and some additional tests to support the findings and observations. It is confirmed that a purely bending-based design of the joints delivers reliable results, but some conditions are set; first, the maximum distance of the lattice girder to the joint may not exceed 400 mm without voiding elements. Second, only a 95 mm distance must be respected with voiding elements or additional protruding reinforcement must be applied. Attention is also given to how the system works when the major components—adhesion, mechanical interlock, and friction—are missing at the interface. Finally, repair possibilities are discussed and how they should be designed.

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Punching behavior of BubbleDeck type reinforced concrete slabs

Cited by 7 publications

References 14 publications

Effectiveness of Limestone Powder as a Partial Replacement of Cement on the Punching Shear Behavior of Normal- and High-Strength Concrete Flat Slabs

Effectiveness of Limestone Powder as a Partial Replacement of Cement on the Punching Shear Behavior of Normal- and High-Strength Concrete Flat Slabs

A Comparative with the Massive Slab Constructive System

Structural Behavior of Floor Systems Made by Floor Plates—Mechanical Model Based on Test Results

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