Jul 21, 2019 bubble deck slab seminar report, ppt, pdf for civil engineering. When designing the cobiax slab, the ec2 2 does not include the design of slabs with flat rotationally void formers. One part of the yard can be used to make a parking area. Dec 28, 2019 a two way spanning voided biaxial slab construction compared to a traditional two way spanning non voided coblax slab construction reduction in the number of pillars. Aug 30, 2019 cobiax slab pdf voided biaxial slabs are reinforced concrete slabs in which voids reduce the amount of concrete. While concrete has been used for thousands of years, the use. This system consists o f hollow plastic spheres cast into t he concrete to create a grid of vo id forms inside the s lab and. Pst2a and 2b updated payment and special provision reference for engineered. This design guide presents stateoftheart practices in voided slab construction. Data slab lantai jembatan tebal slab lantai jembatan ts 0. A two way spanning voided biaxial slab construction with spheres according to the bubbledeck system, compared to older voided slab constructions quick and easy to implement.
Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. Possibility of large span at etchnology load or high load bearing capacity at an equal span. Since revisions or additions to the design file drawings may occur at any time, the receiver agrees to indemnify, defend and hold harmless wsdot, its officers, agents, and employees from and against any and all claims, suits, losses, damages or costs, including reasonable attorneys fees, arising from the use of outdated design file drawings, and such indemnification shall survive acceptance of said file s by receiver. A civil engineer must know all the aspects regarding the flat floor system. Analytical and experimental investigation on voided slab. The washington state department of transportation wsdot makes these documents available on an as is basis.
The slab haunch, also known as the slab pad, is the build up of concrete between the girder and the slab that accomodates geometric effects of. Mar 26, 2020 voided biaxial slabs are reinforced concrete slabs in which voids reduce the amount of concrete. Voided flat slab with drop panels 25 to 30 0,225 0,25 0,3 0,35 prestressed flat slab 40 0,2 0,25 0,3 voided prestressed flat slab 35 0,225 0,25 0,3 0,35 0,6 3 design concepts for flat slabs 3. The check of voided slabs is available only for ecen and for such type of structure which enables using of 2d members. This type of slab is expected to behave like a general twoway reinforced concrete slab because it has segmented voids, rather than the continuous voids of hollow core slabs. Jun 26, 2019 as a voided biaxial slab with spheres only acts like a solid slab, the fire resistance is just a matter of the amount of concrete layer. The concept centers on removing concrete mass from the areas of the slab where it is not structurally efficient. While concrete has been used for thousands of years, the. It has a new functionality checkbox in project setting dialog.
The revolutionary technology of flat slab construction by using hollow sphere to replace the ineffective concrete in the center of the slab bubble beck has many. The advantages of bubble deck slab are less energy consumption both in production. Bubbledeck is the patented integration technique of linking air, steel, and concrete in a twoway structural slab. The light, strong slabs can also allow materials savings throughout the building. It is decisively easier to keep structural records of the slab building elements and ccobiax building as a whole. All warranties and representations of any kind with regard to said documents are disclaimed, including the implied warranties of merchantability and fitness for a particular use.
Statements consisting only of original research should be removed. Cobiax slab pdf voided biaxial slabs are reinforced concrete slabs in which voids reduce the amount of concrete. Slab haunch dimension is the vertical distance from the bottom of the slab to the top of the girder anywhere along the girder. Intelligent and sustainable building anywhere in the world. Bubble deck slab seminar report, ppt, pdf for civil engineering. Plastic voided slab systems can reduce the dead load of slabs by as much as 35% when compared to solid slab construction with the sam e capacity.
If you continue browsing the site, you agree to the use of cookies on this website. The voided slabs are reinforced concrete slabs in which voids allow to reduce the amount volume of concrete. Momen maksimum pd slab dihitung berdasarkan metode one way slab dengan beban sebagai berikut. Aug 12, 2019 voided biaxial slab metadata this file contains additional information such as exif metadata which may have been added by the digital camera, scanner, or software program used to create or digitize it. This pdf file contains a chapter of 23 pages with various aspects of flat slabs including four example of flat slab design. Voided slab example for this example u20 using prestressed voided slab span 3u20190u201d x 21u201d. Aug 20, 2019 voided biaxial slab teechnology according to the contractor this may be caused due to the high temperatures during construction.
Voided biaxial slabs vbs are a resource efficient design for concrete slabs by incorporating voids which significantly reduce overall materials use. Flat slab system is an important division of concrete floor system. Several vbs technologies have been introduced over the last few decades, primarily to reduce the weight of buildings, and designs now have comparable strength to solid slabs. Flat slab analysis, design and detailing pdf civil. Voided slab design i think the biggest issue in your design file is the allowable tension in bridge site stage 1. The tests reveal that the shear strength is even higher than. As a voided biaxial slab with spheres only acts like a solid slab, the fire resistance is just a matter of the amount of concrete layer. Nov 11, 2012 voided slab design i think the biggest issue in your design file is the allowable tension in bridge site stage 1. Pdf voided slab systems were developed using segmented void formers such as spherical or oval plastic balls for twoway slab applications. You can change this text by editing the welcome page via the pages menu in your dashboard. By reducing the weight of the slab without compromising its structural strength, it is possible to create a thicker slab to support more weight over a longer span. Prestressed slab design example free pdf file sharing.
Jan 05, 2020 january 5, 2020 admin leave a comment on cobiax slab pdf voided biaxial slabs are reinforced concrete slabs in which voids reduce the amount of concrete. Manual of the structure and bridge division part 5 prestressed concrete adjacent member standards memorandum to. As a result they allow the construction of flexible and easily changeable buildings. Mar 28, 2020 cobiax slab pdf voided biaxial slabs are reinforced concrete slabs in which voids reduce the amount of concrete. These slabs can be used in applications where slab depth may be an issue or when construction speed is a factor. The creation of the voided slab was invented in the 19th. Voided slab free download as powerpoint presentation.
Architecture this is a modern house plan that can be built in a. Page 4 of 10 shear capacity in % of solid deck ad 2. This is your homepage which is what most visitors will see when they first visit your shop. Voided slab concrete building technology free 30day. File number description of changes toc1 thru 5 revised dates. Pdf a bubble deck slab is a technique of realistically disposing the concrete in the center of the slab, which does not perform any structural. Once concrete is poured over the balls in the panels, the bubbledeck system effectively becomes, and behaves like, a monolithic twoway slab that distributes force uniformly and continuously. The icon for input of a new voided slab is located in service concrete. These void formers are most commonly made of plastic such as highdensity polyethylene, and may use recycled materials.
A two way spanning voided biaxial slab construction compared to a traditional two way spanning non voided coblax slab construction reduction in the number of pillars. Design guide for voided concrete slabs crsi resource. Phase2 voided slab free download as powerpoint presentation. Bubbledeck behaves like a spatial structure as the only known hollow concrete floor structure. To avoid this voided slab system u boot technology is used and to construct a durable. Design the cobiax flat slab has the same mechanical load bearing behaviour as a solid flat slqb slab. Pdf voided biaxial slabs state of art researchgate.
Voided biaxial slab teechnology according to the contractor this may be caused due to the high temperatures during construction. Voided slab systems were developed using segmented void formers such as spherical or oval plastic balls for twoway slab applications. Voided slabs layout1 1 concrete technology corporation. Pdf twoway flexural behavior of donuttype voided slabs. Twoway flexural behavior of donuttype voided slabs pdf. Voided slabs are a precast prestressed slab for bridge, building, marine pier and fish passage culvert replacement applications.
As per the provisions made in aci 31811, check for deflection due to live load and longterm deflection has been studied for the solid flat slab and voided slab system to obtain its structural efficiency. The cobiax advantage for builders reduction ocbiax costs slabs, walls, columns and foundations can be optimised for the reduced loadbearing capacity they are lighter and. This floor system allows for large, clear spans and efficient overall slab thicknesses. This type of slab is expected to behave like a general two. Voided biaxial slab metadata this file contains additional information such as exif metadata which may have been added by the digital camera, scanner, or. Pci bridge design manual appendix b aashtopci standard products aashto solid and voided slab beams oct 97 dimensions inches type l h l1 l2 no. The cobiax flat slab has the same mechanical load bearing behaviour as a solid flat plate slab. These materials are originally located at different websites. All voided biaxial slabs incorporate an array of rigid void formers which contain air within the voids. Design guide for voided concrete slabs crsi resource materials. The slab is very important structure member in building and slab is one of the largest member consuming concrete.
Pci bridge manual appendix b, aashtopci standard products. In order to use the cad file you must download both the cad and std files for that drawing. Title slide of voided slab slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Momen pada slab lantai jembatan formasi pembebanan slab untuk mendapatkan momen maksimum pada bentang menerus dilakukan seperti pd gambar. Flat slab analysis, design and detailing pdf civil engineering. Biaxial voided slabs are reinforced concrete slabs in which the voids allow concrete to be reduced. In the first loading cases, the cobiax solution showed better values of deformation and less quantity of used materials, although at a slightly higher cost.
Hollowcore slabs, also known as voided slabs, initially appeared as oneway elements in europe during the 1950s, and are still commonly manufactured in precast form for. In addition to the very easy and fast cobiax elements distribution sitting on the bottom steel reinforcement, the construction implementation becomes much faster than any other slab system, this is due to the following facts. Voided biaxial slabs are reinforced concrete slabs in which voids reduce the amount of concrete. Since the coarse mesh predicts a slightly higher limit load than the medium and fine meshes do and the limit loads for the medium and fine mesh analyses are very close, the tension stiffening study is performed using the medium mesh only. When the load acting on the slab is large or clear span between columns is more, the slab thic kness is on increasing. Several vbs technologies have been introduced over the last few decades, primarily to reduce the weight of buildings, and. Montana department of transportation mdt bridge standard drawings. Analytical study of solid flat slab and voided slab using.
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