Flat slabs may have drop panels at columns and columns may have capitals. Flat slab is defined as one sided or twosided support system with sheer load of the slab being concentrated on the supporting columns and a square slab called drop panels. Flat slab system is a concrete plate propped on columns without the existence of beams. Bending will take place in the two directions in a dishlike form. To this end, a few examples of flat slabs with different positions, shapes, and dimensions of the opening with normalstrength. Nonlinear behaviour of reinforced concrete flat slabs after a column. Jan 15, 2018 advantages and disadvantages of flat slab. Flat slab types of flat slab design and its advantages. Analyses are for a onebaywide strip using the equivalent frame analysis method of the aci code. This flat plate slab design is hand written involving each step by step. Location of pacificfarallonnazca conjugate features relative to a given flat slab.
Typical flat slab structural forms a flat plate, b flat slab with drop panel and column capital nilson. The flat slab is a twoway reinforced concrete slab that usually does not have beams and girders, and the loads are transferred directly to the supporting concrete columns the column tends to punch through the slab in flat slabs, which can be treated by three methods using a drop panel and a column capital in flat slab. A study of flat plate slab column connections with shear plate in tall concrete building using experimental and numerical analysis young s. Flat slab flat slab are also known as beamless slab, is a type of slab in which the flooring slab is directly supported on columns without the agency of beam or girders.
Explore flat slab with free download of seminar report and ppt in pdf and doc format. Load transfer in a oneway slab, b twoway slab nilson fig. Analysis of flat sanalysis of flat sllabab moment division example 6000 6000 6000 6000 6000 5000 layout of building 7000 5000 a floor slab in a building where stability is provided by shear walls. Drop panels play a significant role here as they augment the overall capacity and sturdiness of the flooring system beneath the vertical loads thereby boosting cost. Flat slab seminar report, ppt, pdf for civil engineering. Download book flat slab pdf noor book for download. Increases the punching shear capacity 6 of flat slabs without increasing the slab flexural capacity. The rest of the floor can be slightly thinner with less dead weight. In a flat slab building, you can do a punching shear calculation based on the reaction but, in a slab bridge, a knowledge of the distribution of shear stresses would be helpful. Flat slab construction places no restrictions on the positioning of horizontal services and partitions and can minimize floortofloor heights when there is no requirement for a deep false ceiling. Get flat slab analysis and design alternative downloads. Apr 25, 2019 how to form, pour, and stamp a concrete patio slab duration. The slab critical section, used for slab strength determination, is the same as that specified in aci 318, although the definition has been modified to clarify that slab critical sections for rectangular supports may be assumed to have a rectangular shape.
Blast design procedure for flat slab structures dtic. This design is a complete flat plate slab design, from shear to bending along with design of columns and shear head reinforcement. A study of flat plate slab column connections with shear plate. Effect of premature loading on punching resistance of reinforced. Design of reinforced concrete structures ii twoway slabs 1 1. Also explore the seminar topics paper on flat 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. Oneway and twoway slabs oneway slabs transfer the imposed. The best flat slab analysis, design and detailing related pdf and slides are provided here altogether. Flat slab design pdf design of two way slab example pdf bs 8110 concrete design for slab flat plate design beam and slab bridge uk slab on grade foundation post tension slab beam and slab bridge how to calculate formwork for slab how to pour a concrete slab concrete beam and slab bridge how to pour a 26x36 concrwte concrete slab operation. The quality of a concrete floor or slab is highly dependent on achieving a hard and durable surface that is flat, relatively free of cracks, and at the proper grade and elevation. General this handout discusses the effect of load transfer between floors in multi storey construction, where the maximum thickness of reinforced concrete floor slab does not exceed 350mm. Ludowicis flat slab shingle tile has a smooth surface and square butt creating a clean look suitable to any architectural style.
Design of rcc structures lecturer notes topic wise pdf. For uniformly distributed loads of w per square foot of the slab, each strip acts approximately like a simple beam uniformly loaded by its share of w. The load is transferred directly from slab to column in the flat slab. Flat slabs concrete columns reinforced flat slab design. Design of flat slab with edge beams by direct design method 16 14 14 3 b c 1 c 2 c 3 c 4 3 1 c 5 c 6 c 7 c 8 c 9 14 c 10 11 c c 12 c c 14 c 15 c 16 8 c 17 c 18 c 19 c 20 8. The benefits of using insitu concrete flat slab construction should be investigated at the conceptual design stage. Flat slab sized for punching shear and deflection additional reinforcement added to span steel to reduce deflections typically 25% extra on a 7. Download file pdf flat slab manual design bs flat slab design example part 1 how to design a flat slab, step by step explained in this video. Premature loading of reinforced concrete flat slabs in multi storey buildings during construction may occur after shuttering removal. Effect of column dimensions on the punching shear of flat slab. Design manual to bs8110 bs8110 general detailing rules.
Pdf download for nonlinear behaviour of reinforced concrete flat slabs. Design of two way slab example pdf flat slab design pdf bs 8110 concrete design for slab how to calculate formwork for slab beam and slab bridge uk beam and slab bridge how to pour a concrete slab slab on grade foundation post tension slab concrete beam and slab bridge how to pour a 26x36 concrwte concrete slab operation management 9th edition myomlb nigel slab usercentered design. Flat plate slab is that in which slab is directly supported on columns without column capital, drop panel or beams. Post a quote from flat slab author muhammad alsibai the quote is the literal transfer from the source and no more than ten lines. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. Pdf flat slabs are highly versatile elements widely used in construction, providing minimum depth, fast construction. Flat slab system is an important division of concrete floor system. Scribd is the worlds largest social reading and publishing site. Punching, shear is a category for collapse for reinforced concrete slabs exposed to great confined forces. Beside this, due to shear problems at column heads, the thickness of flat slab is greater. Flat slab analysis, design and detailing pdf civil engineering. The early reinforced concrete flat slabs all had drops, and columns with capitals, and were considered to be the structure of choice for warehouse construction and heavy loads. These materials are originally located at different websites. Flat slab resting directly on columns flat slab with drop panels fla.
Slabs are constructed to provide flat surfaces, usually horizontal, in building floors, roofs, bridges, and other types of structures. Flat slab may be analyzed and desig ned by any me thod as long as they satisfy the strength, stiffness an d sta bility requirements of the is. Properties of the surface are determined by the mixture proportions and the quality of the concreting and jointing operations. This download was checked by our builtin antivirus and was rated as clean. In this kind of slab mains bars cranked bars are provided in shorter direction hence there is no need of calculating the crank bar length in ydirection from fig. As per the above figure floor slab 2 is a one way slab. Trusted windows pc download flat slab analysis and design 2. Accordingly, main reinforcement is required in the two directions. Oneway wide module joist slab in the lower middle is a variation on the oneway.
Flat plate strength is often governed by shear strength at the columns, and for service live loads greater than perhaps 100 lbft2 4. Enhancement of punching shear strength of flat slabs using shear. Design of flat slab with edge beams by direct design method 16 14 14 3 b c 1 c 2 c 3 c 4 3 1 c 5 c 6 c 7 c 8 c 9 14 c. Flat slab free download as powerpoint presentation. Powered by the equivalent frame method of analysis and design per latest american aci 31814 and canadian csa a23. Flat slab analysis and design free version download for pc. Oct 05, 2019 flat slab construction places no restrictions on the positioning of horizontal services and partitions and can minimize floortofloor heights when there is no requirement for a deep false ceiling. Flat slab design pdf design of two way slab example pdf bs 8110 concrete design for slab flat plate design beam and slab bridge uk slab on grade foundation post tension slab beam and slab bridge how to calculate formwork for slab how to pour a concrete slab concrete beam and slab bridge how to pour a 26x36 concrwte concrete. Reinforced concrete flat slabs are widely employed in structural systems.
Nancy debora assistant professor civil karunya university 2. Flat slab analysis, design and detailing pdf civil. The benefits of using insitu concrete flat slab construction should be. Flat slab subduction is characterized by a low subduction angle reported by committee 302 american concrete institute. Previous studies have demonstrated that reinforced concrete flat slab.
The lack of correlation between flat slabs and bathymetric. A civil engineer must know all the aspects regarding the flat floor system. Analysis of flat sanalysis of flat sllabab column head l. During the former century, flat slabs have been used widely in different building types. The linkstudpsr system comprises short lengths of carbon steel deformed bar. When the imposed load applied to a particular floor slab exceeds its carrying capacity, then. The distribution of reinforcement throughout the slab is based on the elastic distribution of design moments outlined by the american concrete. The flat slab is a reinforced concrete slab bolstered, by a number of columns. The analysis and design follow the equivalent frame analysis method of the aci code, which considers a onebay wide strip of the floor system as a continuous frame. Oneway and twoway slabs university of asia pacific. A civil engineer must have sufficient knowledge on various features of flat slab system. Design of reinforced concrete structures ii twoway slabs.
Download the excel sheet for reinforced flat slab design in concrete floor system, the flat slab system is considered as one of the vital parts. In conventional slabbeam system, the load is transferred from slab to beam and ultimately beam to the column. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. The slab may be supported by walls, by reinforced concrete beams usually cast monolithically with the slab, by structural steel beams, by columns, or by the ground. The slab critical sections for several support geometries are shown in fig. An experimental program includes seven full scale square flat slab interior column specimens tested. From our analysis there are no conjugate impactors that can be associated with the payenia flat slab. This can have knockon benefits in terms of lower building height, reduced cladding costs and prefabricated services. This system is similar to the twoway flat plate system except there is a drop panel to provide extra thickness around the columns. For beamless slabs, the choice between a flat slab and a flat plate is usually a matter of loading and span. Flat slab analysis and design designs beamless concrete slab floors flat slab or waffle slab in accordance with aci 318. Mike day everything about concrete 1,179,358 views.
Department of mechanics, materials and structures english. Analyze and design flat slab or waffle slab floors. Slabs and flat slabs lecture 5 19 th october 2016 contents lecture 5 designing for shear in slabs including punching shear detailing solid slabs flat slab design includes flexure worked example exercise punching shear. Backpropping flat slabs by peter pallett bsc eng fice fcs 1. Flat slab cad drawing dwg cadblocksfree cad blocks free. The benefits associated with flat slab construction may well outweigh those of other structural solutions, which could be more complicated, timeconsuming and ultimately more costly. Aug 30, 2014 flat plate slab is that in which slab is directly supported on columns without column capital, drop panel or beams. Ludowicis flat slab clay shingle tile is covered by a 75year material warranty. Shear capacity of reinforced concrete flat slabs made with high.
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