Page 4 of Deck Types. The simple BubbleDeck® is cast over the pre- fabricated ‘bubble- lattice’ on traditional formwork. In the filigree-slab BubbleDeck ® the. BubbleDeck – the Biaxial Hollow Slab. Architectural freedom, Flexibility in Design and Use, Fast and Inexpensive, Savings and Environmental Benefits. Bubble deck slab. 1. BUBBLE DECK SLAB; 2. CONTENTS Introduction Materials Advantages Experimental Study Scope of Future.
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These elements comprise the top and bottom reinforcement mesh, sized to suit the specific project, joined together with vertical lattice girders with the void formers trapped between the top and bottom mesh reinforcement to fix their optimum position.
The reinforcement structure with spherical shapes and possibly a thin concrete shell as precast slab floor are supplied to the construction site in factory-made units with a maximum width of 3 meters; they are installed on site and are assembled by installing connecting rods and by pouring concrete as shown in fig 2.
A New Year’s resolution: If we consider damping to be similar to solid slabs, and concentrate on stiffness, we may observe that a Bubble deck slab can provided over 2 times the stiffness obtained from a solid slab for the same quantity of concrete used. This is a really clever idea that takes out all the stuff in the middle that you don’t really need, and replacing it with air. If the applied shear is greater than the hollow slab resistance we omit balls and make it solid and then Check the solid part.
A two way spanning voided biaxial slab construction compared to a traditional two way spanning non voided biaxial slab construction:. This type of BubbleDeck is optimal for new construction projects where the designer can determine the bubble positions and steel mesh layout. Earthquake proof Lower seismic mass.
The steel is fabricated in two forms -meshed layers for lateral support and diagonal girders for vertical support of the bubbles. If this is exceeded by the applied shear, at a column for example, we leave out the balls and use the full solid shear values. For this reason major developments of reinforced concrete have focused on enhancing the span, either by reducing the weight or overcoming concrete’s natural weakness in tension.
While concrete has been used for thousands of years, the use of reinforced concrete is usually attributed to Joseph-Louis Lambot in Possibility to gain floors at the same building height towers and building volume. Views Read Edit View history. The Bubble deck slab floor system can be used for storey floors, roof floors and ground floor slabs.
We therefore use Euro code 2, which is fully compatible with the system, for our design and which is somewhat more up to date than BSO. Reduction in the number of pillars.
Voided biaxial slab – Wikipedia
In principle, voided biaxial slabs act like solid slabs. Quick and easy to implement.
Savings in useful sllab on each level as there are no emerging beams. For decades, [ when? Using BubbleDeck, leading national builder Hansen Yuncken has responded to the numerous challenges of building large span slabs in a major regional medical facility No beams between pillars.
The main obstacle with concrete constructions, in case of horizontal slabs, is the high weight, which limits the span. Additional steel may be inserted according to the reinforcement requirements of the design.
The main criterion for reducing noise is the weight of the deck and therefore BubbleDeck will not act otherwise than other deck types with equal weight. According to the manufacturer, Bubble deck slab can reduce total project costs by three percent. Cracking in Bubble deck slab is not worse, and probably better, bubbledrck solid slabs designed to work at the same stress levels. In an intense, prolonged fire, the ball would melt and eventually char without significant or sslab effect.
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The shear stresses remote from the columns diminishes rapidly and outside the column zones it has been demonstrated by testing and calculation the transverse and longitudinal shear stresses are within the capacity of the Bubble deck slab system.
The full depth of the slab is reached by common concreting techniques and finished as necessary. The advantages are less energy consumption – both in production, transport and carrying out, less emission – exhaust gases from production and transport, especially CO2.
Bubble Deck Technology Uses Less Concrete by Filing The Slab With Beach Balls | TreeHugger
It is a method of virtually eliminating all concrete from the middle of a floor slab not performing any structural function fig 1thereby dramatically reducing structural dead weight. Top 10 vegan blogs to follow. It may require cleanup to comply with Wikipedia’s content policies, particularly neutral point of view. This is only valid when considering the voided biaxial bubbledevk technology.
Using Euro code 2, we would calculate the applied shear at 2d and subsequent perimeters from the column face as per the code requirements, as well as at the column face itself.
August Learn how and when to remove this template message. In any flat slab, design shear resistance is usually critical near columns.
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In fact one of the major benefits of the system is its virtue of reducing deflections for a given span because the one-third weight reduction overwhelmingly more than compensates for the very small reduction in stiffness. Focus has been on biaxial slabs and ways to reduce the weight.
Can be used together with prefabs. The potential for any contact is only theoretical because the balls do not perfectly fit between reinforcement bars and moves slightly during assembly I site concrete compaction so that some grout surrounds it and provides a measure of passivation.
Unlike Type A and B, it is a one-way spanning design that requires the use of support beams or load bearing walls. Possibility of large span at equal load or high load bearing capacity at an equal span.
In practice, the reduced shear resistance will not lead to problems, as balls are simply left out where the shear is high, at columns and walls. A two way spanning voided biaxial slab construction buubbledeck spheres according to the BubbleDeck system, compared to older voided slab constructions:. Other types of voided biaxial slabs have reduced resistances towards shear, local punching and fire. In slabs, the depth of compressed concrete bugbledeck usually a small proportion of the slab depth and this means that it almost always involves only the concrete between the ball and the surface so there is no sensible difference between the behavior of a solid slab and Bubble Deck.
Fewer dimensional limitations for the elements. BubbleDeck Type B is a reinforcement module that consists of a pre-assembled sandwich of steel mesh and plastic bubbles, or “bubble lattice”.
If the applied shear is less than the un-reinforced hollow slab resistance, no further check is required.