Punching behavior of biaxial hollow slabs

Schnellenbach‐Held, Martina; Pfeffer, Karsten

doi:10.1016/s0958-9465(01)00071-3

Cited by 74 publications

(50 citation statements)

References 1 publication

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“…These reduction levels registered in the BD series are in agreement with the values obtained by other researcher. 4 The average deflection at peak load was larger in the SS series, and no tendency was registered in terms of the influence of the precast RC floor plates for the slab's deformability. Figure 11 shows that up to about ≈740 kN (and ≈10 mm deflection) the load versus average deflection was almost coincident in all the tested slabs, and the loss of stiffness T A B L E 3 Load carrying capacity and deflection performance of the tested slabs Figure 10c shows the locations where the strain gauges were placed on the slab's bottom concrete surface for measuring the radial (CRS) and circumferential (CCS) strains.…”

Section: Load Carrying and Deflection Capacitiesmentioning

confidence: 85%

Punching behavior of BubbleDeck type reinforced concrete slabs

Nicácio

Barros

Melo

2019

Structural Concrete

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The BubbleDeck type slab (BD) is a reinforced concrete (RC) flat slab that includes recycled plastic hollow spheres (RPHS) in its core for decreasing its dead weight. However, punching capacity of BD slabs can be a critical aspect, thereby this work is devoted to assess experimentally its punching behavior. An experimental program composed of four real scale prototypes, representative of RC flat slabs in punching loading conditions, was carried out. Two of these slabs are of BD type, while the other two do not include the RPHS system, herein denominated as RC solid slab (SS). The test results show that all the tested slabs failed in punching after the occurrence of yield initiation of the flexural reinforcement. The punching capacity and the deflection at failure of BD type slab has decreased up to 14% and up to 44%, respectively, when compared to the corresponding SS type slab. A relatively small ductility index was obtained (between 1.51 and 2.65). In BD type slabs, the punching failure surface had tendency to propagate through the RPHS, at an inclination angle of about 45°.

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Section: Load Carrying and Deflection Capacitiesmentioning

confidence: 85%

Punching behavior of BubbleDeck type reinforced concrete slabs

Nicácio

Barros

Melo

2019

Structural Concrete

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“…Some research has been carried out on the effect of BubbleDeck on the shear capacity. From experimental tests carried out by [3] and cited by [1] on full-scale BubbleDeck slabs and comparison to theoretical calculations for solid slab, they observed a reduction in shear capacity of up to 40 %. While extensive research exists on each of the key research areas outlined above, very little literature has been published relating to location of BubbleDeck and their effect on shear connections.…”

Section: Composite Steel-concrete Constructionmentioning

confidence: 99%

08.42: Composite behaviour of headed stud shear connectors with BubbleDeck flooring

et al. 2017

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BubbleDeck is a biaxial voided concrete slab product that was developed in the 1990's by Danish engineer Jorgen Breuning. The technology is similar to other modern voided slabs such as U-Boot and Cobiax, however it has its distinct advantages. These advantages include decreased construction time, material costs savings and the environmental benefits. Composite steel-concrete construction is an increasingly common construction method in the modern building industry. This process involves utilising the high tensile strength of steel and the high compressive strength of concrete to create composite members with structurally favourable characteristics. In order to join the steel and concrete components, a connection is needed to stop slip occurring at the interface and allow the materials to behave as a single element. The most common connection is the end welded headed shear connector, known more commonly as the shear stud. Shear studs have a recommended design capacity as specified by suppliers and connections are designed according to these capacities. Standards such as Eurocode and Australian Standards have a guide for composite connection design; however, these guides do not pander to new technologies such as BubbleDeck. As such engineers and designers often have difficulty and uncertainty in designing these types of connections. Through analysis of composite connections and BubbleDeck specifications, a series of test specimens has been designed. Specimens were composed of concrete, steel reinforcement, a steel section, shear studs and BubbleDeck void formers. These specimens were tested according to the Eurocode 4 standard to study the interactions of the BubbleDeck voids and the headed shear connectors. Experimental results and observations were recorded during and after the test specimens were tested. Results suggested that the overall shear capacity or BubbleDeck slabs in composite beams was approximately 5 to 10 % less than the capacity of equivalent solid slabs. The observations showed that the proximity of headed shear connectors to voids did not have a significant effect on the capacity of the connection, with respect to the arrangements tested.

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“…Structural System with Voided Biaxial Slabs. The voided biaxial reinforced concrete slab, constructed using prefabricated voided modules and cast in situ reinforced concrete, has gained wide attention since its emergence as a new structural system [6][7][8][9][10]. These ecofriendly voided biaxial slabs have many advantages over conventional solid concrete slabs, such as lower total cost, reduced material use, enhanced structural efficiency, and decreased construction time, that have contributed to their wide application in civil construction.…”

Section: Voided Biaxial Slab-based Tuned Rollingmentioning

confidence: 99%

“…Specifically, this is achieved by laying less heavy material, such as polystyrene or polypropylene made hollow modules between the reinforcement of beams/ribbed beams, and thus displacing concrete with less structural benefit. A typical technology used in Europe is the so-called "BubbleDeck" biaxial voided slab [9,10], in which spherical hollow modules composed of recycled industrial plastic are used, allowing the hollow slab to act as a normal monolithic two-way spanning concrete slab. For another form of hollow module, see the "Uboot" [7] technology, as an example.…”

Section: Introductionmentioning

confidence: 99%

Seismic Response Reduction of Structures Equipped with a Voided Biaxial Slab-Based Tuned Rolling Mass Damper

Kong

2015

Shock and Vibration

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This paper proposes a novel tuned mass damper (TMD) embedded in hollow slabs of civil structures. The hollow slabs in this context, also referred to as “voided biaxial reinforced concrete slabs,” feature a large interior space of prefabricated voided modules that are necessary in the construction of this special structural system. In this regard, a tuned rolling mass damper system (“TRoMaDaS”) is newly proposed, in combination with hollow slabs, to act as an ensemble passive damping device mitigating structural responses. The main advantage of this TMD configuration lies in its capacity to maintain architectural integrity. To further investigate the potential application of the proposed TRoMaDaS in seismic response mitigation, theoretical and numerical studies, including deterministic and stochastic analyses, were performed. They were achieved by deterministic dynamic modeling using Lagrange’s equation and the statistical linearization method. Finally, the promising control efficacy obtained from the deterministic/stochastic analysis confirmed the potential application of this newly proposed control device.

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Punching behavior of biaxial hollow slabs

Cited by 74 publications

References 1 publication

Punching behavior of BubbleDeck type reinforced concrete slabs

Punching behavior of BubbleDeck type reinforced concrete slabs

08.42: Composite behaviour of headed stud shear connectors with BubbleDeck flooring

Seismic Response Reduction of Structures Equipped with a Voided Biaxial Slab-Based Tuned Rolling Mass Damper

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