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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While a sslab biaxial slab as the BubbleDeck system must be calculated as a solid slab, ribbed slab systems, like the U-boot system, consisting of a grid of orthogonal “I” beams, must be calculated as beams. As this floor type is made of complete prefab elements with no structural coherence, support moments are absent, resulting in increased bubbledecm consumption.
A two way spanning voided biaxial slab construction with spheres according to the BubbleDeck system, compared to older voided slab constructions:. Economical and easy to transport, handle and store, also outdoors. Open spaces Larger spaces. The results are shown in table 2.
The concrete is standard structural grade concrete and combined with adequate bar cover determined in accordance with EC2 or BSO provides most control of durability commensurate with normal standards bubbledecm solid slabs.
The main difference between a solid slab and a voided biaxial slab refers to shear resistance.
BubbleDeck North America LLC – Advancing Concrete Design & Construction
Shear resistance of bubble deck slab is 0. Due to the reduced concrete volume, the shear resistance will also be reduced. In any flat slab, design shear resistance is usually critical near columns. Other types of voided biaxial slabs have reduced resistances towards shear, local punching and fire. Bending stresses in the bubble deck slab are found to be 6. Seminar Report with PPT. FE modeling, including non-linear cracked section analysis is used to calculate the deflection using normal structural concrete with a Young’s Modulus secant Ecru, multiplied by 0.
As a result, major projects around the world have chosen the BubbleDeck technology as the low-risk way to build large and complex projects. At the present time, the static modification to the flexural stiffness is applied.
Span depth ratio calculations for deflections are very approximate and are not appropriate in flat slabs of irregular layout except for the most simple or unimportant cases.
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A New Year’s resolution: If the resistance is still greater than the solid slab resistance and less than the maximum allowed, we provide shear reinforcement. Daily and Weekly newsletters available. The aim of this paper is to discuss about various properties of Bubble deck slab slxb on the various studies done abroad.
Articles with Italian-language external links Wikipedia articles with possible conflicts of interest from February Articles that may contain original research from August All articles that may contain original research All articles bubbleddeck vague or ambiguous time Vague or bubblededk time from August Simplified changes to the purpose of use.
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. But this innovative slab construction technology is proven to be more efficient than a traditional biaxial concrete slab in an office floor system.
If the applied shear is less than the un-reinforced hollow slab resistance, no further check is required. It is a better situation than exists with inclusion of plastic rebar spacers within solid slabs that create a discontinuity within the concrete between the outside bubblddeck and the rebar in solid reinforced concrete slabs. This situation has not changed for more than 20 years. This page was last edited on 12 Decemberat For all types of BubbleDeck, the maximum element size for transportation reasons is 3 m.
Double slab, upper skab lower. The splice bars are inserted loose above the pre-cast concrete layer between the bubbles, and purpose made mesh sheets tied across the top reinforcement mesh to join the elements together. The voided biaxial slabs technology is directly incorporated in international standards as the Eurocodes, and various national codes such as the CUR in the Netherlands. Quick and easy to implement.
This can be exploited in bubbleeeck sensitive applications. The most effective weapons against vibration , particularly resonant vibration, are stiffness and damping. Fewer dimensional limitations for the elements. From Wikipedia, the free encyclopedia. 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.
Bubble deck slab joints have a chamfer on the inside to ensure that concrete surrounds each bar and does not allow a direct route to air from the rebar surface. BubbleDeck is the patented integration technique of linking air, steel, and concrete in a two-way structural slab.
An early example is the Pantheon in Romebuilt AD. For a voided biaxial slabs with spheres the shear resistance is proportional to the amount of concrete, as the special geometry shaped by the ellipsoidal voids acts like the famous Roman arch, enabling all concrete to be effective. Tech thesis, MIT, BubbleDeck Type B is a reinforcement module that consists of a pre-assembled sandwich of steel mesh and plastic bubbles, or “bubble lattice”.
High density polyethylene hollow spheres replace the in-effective concrete in the centre of the slab, thus decreasing the dead weight and increasing the efficiency of the floor. Moreover,the slab will not explode due to the escaping of over pressurised gas from the feet 4 feet for each formwork that act as safety valves.
A Bubble deck slab floor is a flat slab floor, therefore without beams and column heads.