May 12, 2015 perhitungan voided slab jombor fly over yogyakarta oleh. However, their voids are placed on the underside of the slab rather than embedded within the slab, leading to lower shear strength and fire resistance. Design guide for voided concrete slabs design guide 56 pp 1st edition table of contents. Thecantilever portion of the voided slab bridge consistsof the crash barrier and wearing coat.
As an example for a 9 metre span between columns with multiple spans and requiring 1. Jun 01, 2014 title slide of voided slab slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. The concept centers on removing concrete mass from the areas of the slab where it is not structurally efficient. Analytical study of solid flat slab and voided slab using. Longitudinal anticracking analysis for posttensioned voided.
Posttensioned concrete voided slab girders are widely used in highway bridge constructions. Flat plate voided concrete slabs, reinforced concrete floor systems, twoway slabs, voided slabs. Hollow slabs with innovative types of voids manmade. Voided flat plate slabs enable a type of construction that. U boot voided slab technology iot big data green computing mobile computing data mining arti. It done to reduce the dead the dead weight of the slab. From excavation to toppingout, the positive contribution of voided slab weight reduction alone delivers surprising advantages for owners, designers and.
It was invented by jorganbreuningof denmark about 20 years ago. In association with daliform group srl, italy, we present isects system uboot beton, a voided slab technology that allows large spans, efficiently formed as flat plates without beams, for many types of buildings and other structures while using significantly less concrete than if solid. For live load cantilever portionhas to be checked individually for 70r loading andclass a loading. This product innovation evolved due to the requirement of our customers to achieve greater structural spans whilst reducing the overall building mass and maintaining the benefits of our flood wideslab. Structural behavior of reinforced concrete oneway slabs voided by. Pdf comparative studies of conventional slab and bubble deck. Data voided slab lebar jalan jalur lalulintas b1 7. Flexural strength of oneway composite steel deck slabs.
Voided slabs are a precast prestressed slab for bridge, building, marine pier and fish passage culvert replacement applications. Abstract a voided slab is a concept that simply removes the excess concrete from the expensive part of the structure slab. These slabs can be used in applications where slab depth may be an issue or when construction speed is a factor. Waffle slabs are a common type of hollowcore slab which use the same principle as voided biaxial slabs. It is now gaining popularity both in europe and in asia. Europe, north america, oceania, and so on so this paper verified structural concept and performance, economic effects of twoway void slab and analyzed co2 emission reduction effect through construction materials. Flat plate voided concrete slab systems, which have been used for many years in europe and other parts of the world, are becoming increasingly popular in the united states because of their many. The icon for input of a new voided slab is located in service concrete. Division, volume v part 2, chapter 1 and conversion to microstation v8. The study provides a recommendation with regard to how the virginia department of transportations structure and bridge division could revise its guidance on design, construction, and maintenance of adjacent member prestressed structures such as voided slabs to address issues identified in this study.
Oldcastle precast is the leading manufacturer of precast concrete, polymer concrete and plastic products in the united states. Voided concrete flat plate slab systems, which have been used for many years in europe and other parts of the world, are becoming increasingly popular in the u. They are biaxially reinforced concrete flat slab systems with a grid. Voided slab free download as powerpoint presentation. This design guide presents stateoftheart practices in voided slab construction. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. Request pdf flexural strength of oneway composite steel deck slabs voided by circular paper tubes a new type of composite steel slab system called tubedeck td. This session discusses stateoftheart practices in voided slab technology. The check of voided slabs is available only for ecen and for such type of structure which enables using of 2d members. To obtain greater section hollow rate and reduce the selfweight, the plate thickness of slab girders are designed to be small with the adoption of flat anchorage system. Slab is largest member which consumes concrete and. Spherical void formers in concrete slabs request pdf. Java project tutorial make login and register form step by step using netbeans and mysql database duration. Pdf bubble deck is a revolutionary method of virtually eliminating concrete from neutral axis.
Large span concrete flat slab systems with internal spherical void formers svf have been used in europe for over a decade. Flood voidslab, our trademark voided slab unit, is flood wideslab with attached eps void formers that allows the slab to span further and reduces the unit self weight. Hollow slabs with innovative types of voids free download as powerpoint presentation. It has a new functionality checkbox in project setting dialog. Design factors and the economical application of spherical type voids in rc slabs kivanc taskin1, kerem peker2 1 anadolu university, engineering faculty, civil engineering department, iki eylul campus, 26555 eskisehir, turkey 2 erdemli engineering and consulting co. The required bubbledeck slab type is the next size up from the minimum bd voided slab thickness. Bridges manufactured by oldcastle precast, a pci certified plant, offer a low maintenance, durable, low cost bridge system. The prestressed concrete voided slab standards include slab widths of 30 and 40. Voided slabs layout1 1 concrete technology corporation. If you continue browsing the site, you agree to the use of cookies on this website. This extra weight of the slab itself then becomes a problem, which can be solved in one of two ways. These section of slab are replaced with some lighter is material. Voided biaxial slabs, sometimes called biaxial slabs, are a type of reinforced concrete slab. However, no attempt has been made to ensure that there were no errors in the conversion process.
Conversion from cube compressive strength to cylinder compressive strength was. With more than 80 locations nationwide, our products are always close at hand. Reinforced concrete slab voided biaxial slab thinner slab depth. Regarding the punching shear strength of voided slabs, several studies have. Voided slab is a method of virtually eliminating all concrete from the middle of a floor slab, which is not performing any structural function, thereby dramatically reducing structural dead weight. Pdf structural behavior of reinforced concrete oneway slabs. Ribbed and waffle slabs in ram concept bentley communities. Using modified material properties or modified slab behavior properties is a possible way to simulate such a voided slab, but the program only analyzes and designs solid slabs. Pci manual for the design of hollow core slabs and walls. Introduction to the voided slab concept history of voided slab systems design concepts a design guide for voided concrete slabs. Forensic investigation of two voided slab bridges in the.
Yadav jaideep purushottam department of civil engineering, nova college of engineering and technology, jafferguda, batasingram village, hayath nagar mandal, r. The first is to use prestressing techniques and the second is to reduce the deadweight of the slab by including voids, often expanded polystyrene cylinders. Multistorey building in the future to develop constructions as flexible and generally applicable that they will be able to pick up changes in a time period reaching far into the next century. The dead load on the cantilever portion includes theweight from crash barrier, wearing coat and the selfweight of the slab.
Voided flat plate voided slab the concept of the voided slab is simple in that concrete mass is removed from the areas in the slab where it is not needed to resist load and as a result of the reduced dead load, voided slabs can span further. Guidelines for design of voidedslab systems youtube. Less waste sharper design voided biaxial slab designing out waste. The bridges are rapid to construct, easy to design and have received wide acceptance within the marketplace. Pdf in the last two decades, the use of voided bubbled slabs in. If it can be imagined, concrete can help make it happen and there is a good chance voided concrete slabs will make it happen more flexibly.
A voided slab is a concept that simply removes the excess concrete from the expensive part of the structure slab. Analytical study of solid flat slab and voided slab using ansys workbench mr. It is a slab from which some part of concrete is removed near the area where it is less useful. Jul 15, 20 innovative structural slab construction practices have taken the efficiency of traditional slab systems to new heights. A simple method for rating of reinforced concrete slab bridges wije ariyaratne, b. Voided concrete slabs provide an open floor plate with fewer columns and no beams to limit design and ultimate use possibilities. 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. Jul 12, 2010 if you are talking about a thin top slab and a thin bottom slab with air between them, thats beyond the scope of the program. As needs change, your building is better prepared to adapt. Uboot beton find, read and cite all the research you need on researchgate.
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