A draft calculation over the internal pressure from heated air enclosure d4. Design guide for voided concrete slabs crsi resource. This floor system allows for large, clear spans and efficient overall slab thicknesses. Civil engineering seminar topicsfree download engineering. Voided concrete slabs provide an open floor plate with fewer columns and no beams to limit design and ultimate use possibilities. Voided slab seminar,bubble deck technology seminar. Bubbledeck voided flat slab solutions technical manual and. 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. Design guide for voided concrete slabs crsi resource materials. Pdf voided slab systems were developed using segmented void formers such as spherical or oval plastic balls for twoway slab. Bubble deck slab seminar report, ppt, pdf for civil.
U boot civil engineering technology seminar report. Hollow biaxial slabs, also known as biaxial voided slabs, are reinforced concrete. The voided slab is also suggested as a new method to reduce the environmental burden since voided section of the slab would use less concrete compared with the normal reinforced concrete slab. Finite element modelling of voided slab bridge decks using. Pci bridge manual appendix b, aashtopci standard products. Perhitungan voided slab jombor fly over yogyakarta oleh. 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. Effect of void former shapes on oneway flexural behaviour of biaxial.
These slabs can be used in applications where slab depth may be an issue or when construction speed is a factor. Voided slab free download as powerpoint presentation. The technology is similar to other modern voided slabs such as uboot and cobiax, however it has. This is your homepage which is what most visitors will see when they first visit your shop. Voided slabs are reinforced concrete slab in which the. The concept centers on removing concrete mass from the areas of the slab where it is not structurally efficient. Next bridge beams 104k, pdf pci zone 6 curved spliced girders 1. Voided concrete slab systems voided concrete slabs. Voided slab principles have been applied in different applications dating back to the early 1900s. 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. However, these losses in the ultimate strength could be compensated owing to the reduction in the selfweight of the voided slab that ranged from 6.
Wed like to understand how you use our websites in order to improve them. 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. The analysis presented illustrates the behavior of bending moments, shear force, displacements, reactions due to change in span for. The cobiax flat slab has the same mechanical load bearing behaviour as a solid flat plate slab.
Voided slab concrete building technology free 30day. It is now gaining popularity both in europe and in asia. 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. 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. The aim of the present invention is to provide slabs with a predetermined strength and to increase the strength of slabs across a wide range of manufacturable sizes by increasing the accuracy with which void formers arranged in a set manner in a reinforced concrete voided slab retain a set optimal shape. 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. Also explore the seminar topics paper on bubble deck slab with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year civil engineering ce or ieee civil construction btech, be, mtech students for the year 2015 2016. It is decisively easier to keep structural records of the slab building elements and ccobiax building as a whole. Also explore the seminar topics paper on uboot with abstract or synopsis, documentation on advantages and disadvantages, base paper presentation slides for ieee final year civil engineering ce or ieee civil construction btech, be, mtech students for the year 2017 2018. The beauty of cobiaxusa voided concrete slabs is in their constructionfriendly design. The icon for input of a new voided slab is located in service concrete.
Biological nutrient removal in waste water treatment download civil engineering projects. It has a new functionality checkbox in project setting dialog. Flat slab system is an important division of concrete floor system. Insitu voided slab design aci concrete design structural. Voided biaxial slabs vbs are a resource efficient design for concrete slabs by incorporating voids which significantly reduce overall materials use. 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. This also allows increased weight andor span, since the selfweight of the slab contributes less to the overall load.
Plastic voided slabs remove concrete from noncritical areas and replace the removed concrete with hollow plastic void formers while achieving similar load capacity as solid slabs. It is recommended that a solid isotropic slab can be used to idealise a voided slab when the void diameter to slab depth ratio is less than 0. Finally, the second layer of concrete completes the slab by flowing into the correct static structure. May 10, 2015 with a voided slab the compression block is smaller and i dont know how to derive the equation for fc. Structural behavior of reinforced concrete oneway slabs. Cobiax is a swiss special biaxial voided slab system developed by cobiax technologies ag. The paper deals with analysis of the voided deck slab and cellular deck slab for medium bridge span ranging from 7. Hdpe spheres and are not prismatic like other hollow core slabs where the. Analysis of voided deck slab and cellular deck slab using.
Forensic investigation of two voided slab bridges in the. 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. Voided slabs are a precast prestressed slab for bridge, building, marine pier and fish passage culvert replacement applications. Explore bubble deck slab with free download of seminar report and ppt in pdf and doc format. Jan 20, 2020 a voided slab is a concept that simply removes the excess concrete from the expensive part of the structure slab. Jul 15, 20 innovative structural slab construction practices have taken the efficiency of traditional slab systems to new heights. In voided slabs, the punching shear strength varies according to the arrangement of voids around the column because voids intersecting a failure surface anywhere along its radial length can directly reduce the punching shear strength and voids outside a failure surface can also reduce. The check of voided slabs is available only for ecen and for such type of structure which enables using of 2d members. Pdf voided biaxial slabs state of art researchgate. You can change this text by editing the welcome page via the pages menu in your dashboard. Twoway flexural behavior of donuttype voided slabs. Voided slabs have been used as an effective technique to replace the heavy reinforcedconcrete solid slabs. Flat slab analysis, design and detailing pdf civil engineering.
It was invented by jorganbreuningof denmark about 20 years ago. Data voided slab lebar jalan jalur lalulintas b1 7. Voided slab design i think the biggest issue in your design file is the allowable tension in bridge site stage 1. The stress raising effect of the voids should therefore be accounted for in the analysis of a voided slab once the void diameter ratio exceeds 0. Pdf twoway flexural behavior of donuttype voided slabs. A voided slab is a concept that simply removes the excess concrete from the expensive part of the structure slab. Compared to traditional solid slabs, the reduced selfweight of. A permanent formwork void former for reinforced concrete voided slabs.
Analysis of voided deck slab and cellular deck slab using midas civil. By forming voids of special shell shape inside the slabs cobiax reduces about 35% of a solid slab selfweight, while keeping almost the same static behavior and traditional nature of the solid slab. Numerical analysis of voided flat slab by sabeedha t c, dr b. 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. Analytical study of solid flat slab and voided slab using. Evaluation of the flexural performance and co2 emissions of. On the job site, time and space are at a premium and builders need systems that save both. Bubble deck slab seminar report, ppt, pdf for civil engineering. Download civil engineering seminar on biological nutrient removal in waste water treatment. Statements consisting only of original research should be removed.
Aashto lrfd bridge design specifications, fifth edition with 2011 interim. As needs change, your building is better prepared to adapt. This session discusses stateoftheart practices in voided slab technology. Uboot seminar report, ppt, pdf for civil engineering. However, no studies have evaluated the co 2 emissions and environmental performance of voided slabs. Grids accommodate any specified mep and posttensioning strand. Biaxial hollow slab with innovative types of voids.
Explore uboot with free download of seminar report and ppt in pdf and doc format. Phase2 voided slab free download as powerpoint presentation. Guidelines for design of voidedslab systems youtube. Voided slabs layout1 1 concrete technology corporation. Flat plate voided concrete slabs, reinforced concrete floor systems, twoway slabs, voided slabs. Page 4 of 10 shear capacity in % of solid deck ad 2. Tno admits that bubbledeck is closer to the solid deck than to the hollow core deck. This design guide presents stateoftheart practices in voided slab construction. Pdf a bubble deck slab is a technique of realistically disposing the. Uboot is a voided slab technology which is used to create slabs with large span or that are able to support large loads without beams for many types of buildings and other structures. This report examines the design process of plastic voided slabs.
1228 1357 41 1048 1127 1358 1014 1166 91 1022 1439 38 1264 93 508 1167 757 1183 343 21 1434 1475 749 140 110 1350 1435 671 1472 234 1192 1135 1447 927 1481 924 1005 650 847 648