Slab supported on edges by wall by stiff rc beam by steel joist. Flat slab analysis, design and detailing pdf civil engineering. 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. Twoway flat plate concrete floor system analysis and design the concrete floor slab system shown below is for an intermediate floor to be designed considering partition weight 20 psf, and unfactored live load 40 psf.
In order to simplify the analysis and to be able to use the superposition principle for evaluating the effect of load combinations, linear analysis is generally adopted even though concrete slabs normally have a pronounced nonlinear response. Flat slab types of flat slab design and its advantages. Punching shear analysis of reinforced concrete flat plates. The best flat slab analysis, design and detailing related pdf and slides are provided here altogether. Structural design of cantilever slabs solved example. A civil engineer must know all the aspects regarding the flat floor system. The slab is outside buildings which subjected to 1 hr fire resistance and design for 50 years design life. Civil engineering for construction informatics csi etabs 2016 flat slab design, strip design and punching shear check please have a look in this video thank subscribe our youtube. Slab resting on walls or sufficiently deep and rigid beams on all sides. The slab directly rests on the column and load from the slab is. Flat slab analysis and design pdf flat slab design pdf 1.
The flat slab system of construction is one in which the beam is used in the conventional methods of construction done away with the directly rests on column and the load from the slabs is directly transferred to the columns and then to the. Pdf analysis of flat slab connection system for seismic loads. 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 in one direction ns. Analysis of posttensioned flat slab by using safe shriraj s. Flat slab seminar report, ppt, pdf for civil engineering. Nancy debora assistant professor civil karunya university 2.
Later on, hong guan 2009 applied the nonlinear layered finite element method lfem. This load covers the slab own weight and a live load equal to 3. 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. Pdf on jan 1, 2015, s p nirkhe and others published analysis of flat slab by matlab coding find, read and cite all the research you need on researchgate. Csi etabs 2016flat slab design, strip design and punching. Salunke mgms college of engineering and technology, kamothe, india mgms college of engineering and technology, kamothe, india abstract the use of posttensioned flat slab is increasing day by day, due to its advantages over traditional concrete. How to design reinforced concrete flat slabs using finite. Design considerations for reinforced concrete flat slab. On the other hand, finite element analysis using computer programs can be used.
This manual describes the algorithms used for the various codes. Pdf analysis and design of flat slab and grid slab and. Analysis of twoway slabs by coefficient method the determination of exact moments in twoway slabs with various support conditions is mathematically formidable and not suited to design practice. Flat slabs can be analysed using the frame equivalent method, or by using the simplified analysis method which involves the use of coefficients. But, till date the analysis of flatslab systems has been a problem due to its. The strip may have up to 20 spans and may have cantilevers at the ends. To achieve this, architects normally extend the slab beyond the ground floor building line, thereby forming a cantilever. Recommendations for finite element analysis for the design.
Analyses are for a onebaywide strip using the equivalent frame analysis method of the aci code. Flat slabs system of construction is one in which the beams used in the conventional methods of constructions are done away with. In this study fe analysis of flat slabs is proposed. Analyze and design flat slab or waffle slab floors.
The slab is without drops and is supported internally and on the external long sides by square columns. Twoway flat plate concrete floor system analysis and design. A study of flat plate slab column connections with shear. However, there are some pitfalls to avoid, that often catch out the unwary. The finite element method is commonly used to design the reinforcement in concrete slabs.
Flat slab is a reinforced concrete slab which has no beams and is directly. Pdf analysis and design of flat slab and grid slab and their. A simplified version of the later ap proach, the socalled the bilinear method, is given by the. Thus, the slabs and the experimental scheme adopted represent the region of negative bending moment, delimited by points of inflection with the length of approximately 1800 mm, i. In this post, we are going to show how we can analyse and design cantilever slabs. Analysis and deflections of reinforced concrete flat slabs. This is the procedure where the structural designer will interpret hisher design and reflect it in a structural plan. This publication seeks to introduce fe methods, explain how concrete can be successfully modelled and how to interpret the results. Flat slab analysis and design free version download for pc. Analysis and design of slabs two way civil engineers pk. Analysis of slabs the objective is to find the following internal forces by analysis. Grdslab concrete slab on grade analysis spreadsheet.
Nowadays flat slabs are used in most of the building because of its advantages. Flat slabs may have drop panels at columns and columns may have capitals. 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. Analysis and design of flat slab and grid slab and their cost ijera. Numerical analysis of flat slab experimentally evaluated is also done in the.
Analysis of the flat slab and grid slab has been done both manually by is 4562000 and by using software also. Reinforced concrete design 1 design of slab examples. Flat slab analysis, design and detailing pdf flat slab system is an important division of concrete floor system. These materials are originally located at different websites. The benefits of using flat slab construction are becoming increasingly recognized. Flat slabs without drops thickened areas of slab around the columns to resist punching shear can be built faster because formwork is simplified and minimized, and rapid turnaround can be achieved using a combination of early striking2 and flying systems. The slab has to carry a distributed permanent action of 1. Goodchild bsc, ceng, mciob, mistructe practical yield line design an introduction to the practical use of yield line theory in the design of economic reinforced concrete slabs, including examples of design of flat.
Oneway and twoway slabs university of asia pacific. Comparative study of reinforced concrete flat slabs with. Analysis and design of flat slab with various shapes. Analysis and design of slabs two way two way edge supported slabs twoway slabs. That is, the concentrated post or wheel load is assumed to be well away from a free slab edge or corner. Flat slab structure leads to economic saving, aesthetic view and yet allow the architect from great freedom of form works as compared to conventional slab structure. Volume 4, issue 12, july 2015 63 loads and boundary conditions the slab is carrying a total working load equal to 12. Volume 4, issue 12, july 2015 analysis of rc flat slab.
Structural design of flat slabs to eurocode 2 structville. 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. The materials to be used are grade c25 concrete and grade 500 reinforcement. Initially, the reinforced concrete flat slabs had drops, and columns with capitals, and. Interpreting the slab analysis result using safe program is the last stage to consider in the design of the slab using safe. A civil engineer should study these lectures and materials for structural engineering acumen. Twoway slabs have two way bending unlike oneway slab.
The slab on grade worksheet assumes a structurally unreinforced slab, aci360type b, reinforced only for shrinkage and temperature. 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. Flat slab analysis, design and detailing pdf civil. It is closely related to the plastic collapse or limit analysis of steel frames, and is an upper bound or mechanism approach. Yield line analysis is an analysis approach for determining the ultimate load capacity of reinforced concrete slabs and was pioneered by k.
Cantilever slabs are common features in buildings due to the need to have bigger spaces at upper floors. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. Flat slab and grid slab has been analyzed by staad pro. There are two methods of analysis of rc flat slab viz. Pdf analysis of flat slab structures subjected to combined. Flat slabs carried on columns and edge beams or walls with no interior beams slabs may be solid of uniform thickness or ribbed with ribs running in one or two directions. An interior load condition is assumed for flexural analysis. Flat slab analysis and design designs beamless concrete slab floors flat slab or waffle slab in accordance with aci 318. Numerical analysis of voided flat slab by sabeedha t c, dr b. Flat slab design in tekla structural designer youtube. Recent earthquakes in which many concrete structures have been severely. Various simplified methods are therefore adopted for determining moments, shears. Failure analysis of punching in reinforced concrete flat. Pdf an equivalent frame method based on equivalent beams and unmodified columns, developed for sidesway analysis of flat plate.
Flat slab is designed by using direct design method. Finite element fe analysis, is a popular powerful computer method of analysing flat slab concrete structures. It was observed that the flat slab with drop is more economical than flat slab. Moreover, the design and construction details of this parking garage are used to illustrate code requirements, flat slab analysis, design details, and the construction of gfrprc flat slabs. Flat slab types of flat slab design and its advantages flat slab is a reinforced concrete slab supported directly by concrete columns without the use of beams. Moment coefficient method simplified method of calculating moments and shear. Department of mechanics, materials and structures english. Pdf the effective width and equivalent frame analysis methods are applied to a flat plate test specimen. The beams reduce the available net clear ceiling height. Seismic analysis of flat slab by using etabs ijitee. Annex i informative analysis of flat slabs and shear walls. In accordance to such research, the lfem is an effective tool in global analysis and. Twoway flat plate concrete floor system analysis and design the concrete floor slab system shown below is for an intermediate floor to be designed considering partition weight 1 knm2, and unfactored live load 1.
A floor system plays an important role in overall cost and service of the building. Page 14 example1 try5 9242008 flat slab analysis and design job. Department of mechanics, materials and structures english courses reinforced concrete structures code. Design considerations for reinforced concrete flat slab floor system harshal deshpande1, radhika joshi2. Explore flat slab with free download of seminar report and ppt in pdf and doc format. Flat slab structures are the best solution for high rise. The flat slab system of construction is one in which the beam is used in the conventional methods of construction done away with the directly rests on column. Tacheometry is a branch of angular surveying in which the horizontal and vertical distances are obtained by optical means as opposed to the ordinary process of chain and tape. Flat plate concrete floor system does not use beams between.
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