Route 7 westbound over sugarland run bridge rehabilitation. The slab construction employed bubbledeck, which precisely sets recycled plastic void formers that look like bowling balls in the hollow deck to displace concrete along the neutral axis. Thecantilever portion of the voided slab bridge consistsof the crash barrier and wearing coat. It is a java based program to split the page of a pdf document or merge several pdf documents together. Page 4 of 10 shear capacity in % of solid deck ad 2. It is a slab from which some part of concrete is removed near the area where it is less useful. Large span concrete flatslab systems with internal spherical void formers svf have been used in europe for over a decade. A hollow core slab, also known as a voided slab, hollow core plank or simply a concrete plank is a precast slab of prestressed concrete typically used in the construction of floors in multistory apartment buildings. One of the more recent innovations is voided slabs, where plastic voids are cast within concrete after being placed in a precise grid. Analytical study of solid flat slab and voided slab using ansys workbench mr. Pdf shaper free is an excellent piece of software out there to help you merge or combine pdf files on windows 10 and earlier windows versions. 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. Slab resting on walls or sufficiently deep and rigid beams on all sides. The check of voided slabs is available only for ecen and for such type of structure which enables using of 2d members.
It was invented by jorganbreuningof denmark about 20 years ago. These section of slab are replaced with some lighter is material. Voided slabs layout1 1 concrete technology corporation. Yadav jaideep purushottam department of civil engineering, nova college of engineering and technology, jafferguda, batasingram village, hayath nagar mandal, r. Slab is largest member which consumes concrete and. Large span concrete flat slab systems with internal spherical void formers svf have been used in europe for over a decade. They are biaxially reinforced concrete flat slab systems with a grid. Analysis and design of straight and skewed slab bridges corpus ul. 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. Innovative structural slab construction practices have taken the efficiency of traditional slab systems to new heights. Flood super voidslab, our trademark voided slab unit, is flood super wideslab with attached eps void formers that allows the slab to span further and reduces the unit self weight. It done to reduce the dead the dead weight of the slab.
The diagram shown above is for a straight gradient. Install new prestressed concrete voided slab beams shift three existing wb route 7 through lanes right during normal operating hours. Perhitungan voided slab jombor fly over yogyakarta oleh. They provide the advantages of having low clearances due to their small section depths, accelerated construction times, and high torsional stiffness. 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. These slabs can be used in applications where slab depth may be an issue or when construction speed is a factor. The improvements on this old concept have taken the efficiency of voided slab systems to the next level with economical spans reaching 50 feet. Oct 21, 2017 the improvements on this old concept have taken the efficiency of voided slab systems to the next level with economical spans reaching 50 feet. This product innovation evolved due to the requirement of our customers to achieve greater structural spans whilst reducing the overall building mass and. It does not seem to need an dependencies except for jre obviouslyor. 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. A voided slab is a concept that simply removes the excess concrete from the expensive part of the structure slab. Show appropriate gradient straight, hump or sag shape on the dead load deflection diagram.
This design guide presents stateoftheart practices in voided slab construction. Jul 15, 20 innovative structural slab construction practices have taken the efficiency of traditional slab systems to new heights. Voided slab technology can reduce the dead load of a concrete slab by as much as 35% and allow for large clear spans. Waffle slabs are a common type of hollowcore slab which use the same principle as voided biaxial slabs. Using modified material properties or modified slab behavior properties is a possible way to simulate such a voided slab. If you continue browsing the site, you agree to the use of cookies on this website. The concept centers on removing concrete mass from the areas of the slab where it is not structurally efficient. Pdfsam basic portable, a free, open source, multiplatform software designed to split, merge, extract pages, mix and rotate pdf files packed as a portable app so you can do your pdf split and merge on the go. Joyce abstract adjacent voided slab bridges avsb are economical systems for short spans.
May 12, 2015 perhitungan voided slab jombor fly over yogyakarta oleh. Seismic response reduction of structures equipped with a voided. In voided twoway slabs, a hard shell with struts is created through the use of appropriately located cavities formed by void formers. A slab is designated as a structural slab when the slab is designed to span between reinforced concrete grade beams that are supported entirely by deep support systems or piers if the slab is unstiffened, i. Design memorandum washington state department of transportation. Cobiax middle east innovative construction systems.
A hollow core slab, also known as a voided slab, hollow core plank or simply a concrete plank is a precast slab of prestressed concrete typically used in the construction. If a structural foundation slab is drawn and a turned down floor slab edge is added, the components have a bold separator line be. Analysis and design of slabs two way civil engineers pk. Oldcastle precast is the leading manufacturer of precast concrete, polymer concrete and plastic products in the united states. Parametric investigation on the seismic response of voided and. Ribbed and waffle slabs in ram concept bentley communities. The dead load on the cantilever portion includes theweight from crash barrier, wearing coat and the selfweight of the slab. Title slide of voided slab slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. Split, merge, extract pages, mix and rotate pdf files. Pdf voided slab systems were developed using segmented void formers such. Voided slab technology can reduce the dead load of a concrete slab by as much.
This reduces the deadload of the slab, which may be as much as 35 percent, enabling longer spans to be covered. This design memorandum requires limitations on precast slab members for minimum depth, introduces new standard precast slab sections, and provides guidance for usage of temporary top strands. 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. As needs change, your building is better prepared to adapt. Analysis and design of slabs two way two way edge supported slabs twoway slabs. Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only. This session discusses stateoftheart practices in voided slab technology. Voided slabs are a precast prestressed slab for bridge, building, marine pier and fish passage culvert replacement applications. It has all the same features as pdfsam basic, plus, it leaves no personal information behind on.
As an example for a 9 metre span between columns with multiple spans and requiring 1. They are biaxially reinforced concrete flatslab systems with a grid. Analytical study of solid flat slab and voided slab using. Founded in 1904 and headquartered in farmington hills, michigan, usa, the american concrete institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensusbased standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design. Flat platevoided 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. It has a new functionality checkbox in project setting dialog.
With more than 80 locations nationwide, our products are always close at hand. Data voided slab lebar jalan jalur lalulintas b1 7. The program can be downloaded as a zip file and can be extracted to any portable location and run. The required bubbledeck slab type is the next size up from the minimum bd voided slab thickness. Voided biaxial slabs, sometimes called biaxial slabs, are a type of reinforced concrete slab. In a reinforced concrete beam without web reinforcement, the external transverse force is resisted mainly by combining three components. I would like to request that a developer looks at making an portableapps version of pdf split and merge. The bridges are rapid to construct, easy to design and have received wide acceptance within the marketplace. The concept of reducing the amount of concrete in a slab has been utilized for many years. Development of improved connection details for voided slab bridges patrick c. Voided slab bridges built in 1957 superstructures are in poor condition and deteriorating quickly very difficult to rehabilitate continual maintenance needs on deck low level of service at bl70 interchange. Pdf twoway flexural behavior of donuttype voided slabs. Bridges manufactured by oldcastle precast, a pci certified plant, offer a low maintenance, durable, low cost bridge system.
Deep support systems are foundations having deep components such as drilled. Several vbs technologies have been introduced over the last few decades, primarily to reduce the weight of buildings, and. This reduced the slabs nonaxial dead load by 30% while maintaining biaxial strength, and saved 786 cubic feet of concrete on the job. This help file describes input and analysis features of slab bridge designer 2. 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. 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. Twoway slabs have two way bending unlike oneway slab. Development of improved connection details for voided slab. 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. Plans having prestressed concrete members shall include a dead load deflection diagram. Voided biaxial slabs vbs are a resource efficient design for concrete slabs by incorporating voids which significantly reduce overall materials use.
Spherical void formers in concrete slabs request pdf. Oneway and twoway slabs university of asia pacific. Voided biaxial slabbased tuned rolling mass damper. The icon for input of a new voided slab is located in service concrete. If an architectural floor slab is drawn and turned down floor slab edge is added, then, if the materials for both slab and edge are the same, there is no dividing line. In addition to combine merge functionality, pdf shaper free program allows you to split pdf files, rotating pages, crop pages, extract pages, add watermark to pdf pages, extract text from pdf file, and. For live load cantilever portionhas to be checked individually for 70r loading andclass a loading. 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. Voided slab free download as powerpoint presentation. Guidelines for design of voidedslab systems youtube. The fe methods also have the advantage of combining all the static analyses and.