The strip may have up to 20 spans and may have cantilevers at the ends. Concrete slab design procedure7 design of continuous slab basics of reinforced concrete slab design slabs are generally designed on the assumption that they consists of. Oct 04, 2017 how to build and setup a concrete foundation for garages, houses, room additions, etc part 1 duration. According to the 1995 aci code, all twoway reinforced concrete slab systems, including edge supported slabs, flat slabs, and flat plates, are to be analyzed and designed according to one unified method, such as direct design method and equivalent frame method.
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. Flat plate slab is that in which slab is directly supported on columns without column capital, drop panel or beams. They are projections from wall face of lintel beams or floor slabs. Oneway simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. Design of slab examples and tutorials by sharifah maszura syed mohsin example 1. Jul 02, 2010 lecture series on design of reinforced concrete structures by prof. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. Punching of flat slabs design for shear at the column heads. Analyze and design flat slab or waffle slab floors. Ultimate behavior of oneway spanning slab linear elastic analysis methods such as moment distribution are linear elastic methods. The design i am going to share with you today is design of flat plate slab as by definition. Find depth of slab using deflection control criteria. Different types of shear reinforcement used at column heads. Powered by the equivalent frame method of analysis and design per latest american aci 31814 and canadian csa a23.
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. For 1m slab width, moment, shear force, oneway continuous slab for continuous slab, moment and shear force can be obtained from table 3. Nptel provides elearning through online web and video courses various streams. The design shear force v d is below the maximum punching strength v rd,max. The design bending moments are zero at discontinuous ends, negative at continuous ends and positive at midspans. The slab has to carry a distributed permanent action of 1. 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. The results of the study show that the slab can be successfully used for residential buildings as it meets all the requirements and demands fewer materials. Civil engineering design of concrete structures nptel. Typically design for deflection is by span to effective depth ratio 18 23. Flat slab analysis and design designs beamless concrete slab floors flat slab or waffle slab in accordance with aci 318. The first reinforced concrete design manual formerly titled aci design handbook was developed in accordance with the design provisions of 1963 aci 318 building code by aci committee 340, design.
These method can be used provided the limitations specified therein are satisfied. International journal of pure and applied mathematics volume. Design of reinforced concrete structures free video lectures. The allowable bearing capacity for the supporting soil is 60 knm 2. This publication seeks to introduce fe methods, explain how concrete can be successfully modelled and how to interpret the results. Oneway and twoway slabs oneway slabs transfer the imposed. Reinforced concrete design 1 design of slab examples and.
A reinforced concrete flat slab also called as beam less slab, is a slab supported directly by columns wit hout beams. All columns are 230 x 450mm, the grade of concrete f ck is 30 nmm 2, and the yield strength of the reinforcement f yk is 500 nmm 2. Flat slab analysis and design free version download for pc. Introduction to spread footings and mat foundations. Flat slab analysis, design and detailing pdf civil engineering. Flat slab is more flexible and economical as compare to conventional slab. This publication seeks to introduce fe methods, explain how concrete can be successfully modelled and how to. Deflection ec2 basic span to depth ratios 12 14 16 18 20 22 24 26 28 30 32 34 36 0. 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. 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. Design methodology design methodology simplified method table 3.
A reinforced concrete slab is built integrally with its supports and consists of equal span of 15 ft. Flat slab design spreadsheets to eurocode excel sheets. Analysis and design of flat slab and grid slab and their. Design of reinforced concrete structures ii twoway slabs 1 1. Analysis of flat sanalysis of flat sllabab column head l ho l h max l c d h i l h l h, max l ho l h max l c d h ii l h l ho effective dimension of a head, where l. Slab with basement walls as a part of the mat figure 5. Analyses are for a onebaywide strip using the equivalent frame analysis method of the aci code. Reinforced concrete flat slabs are commonly used in construction as they provide a number of benefits to the designer including. Department of mechanics, materials and structures english. Explore flat slab with free download of seminar report and ppt in pdf and doc format. The main objective of the paper is to study method of analysis and design of flat slab by using aci 318 08 design codes, with matlab programming for the easy application language for the design of flat slab. One way slab being supported on two opposite sides only leads to the structural action in single direction. The floor system is supported by columns of size 500 mm. How to design reinforced concrete flat slabs using finite.
Design of reinforced concrete structures ii twoway slabs. R it is observed that the flat slab with drop is more economical than flat slab without drop and grid slabs. The beams run both ways and the columns and, located at the intersection of the beams. Even while designing they are considered as oneslabs with cantilever fixed or continuous at supports. Comparative analysis and design of flat and grid slab system. To see their result for this slab we will find the load factor. Bending will take place in the two directions in a dishlike form. The service live load is 100 psf and 4000 psi concrete is specified for use with steel with a yield stress equal to 60000 psi. The procedure of the design of oneway slab is the same as that of beams. Flat slab seminar report, ppt, pdf for civil engineering. This design is a complete flat plate slab design, from shear to bending along with design of columns and shear head reinforcement. Design of cantilever slab spreadsheet engineering books. For this slab, panel a has two discontinuous exterior edges and two continuous interior edges, panel b has one discontinuous and three continuous edges, while the interior panel c has all edges continuous.
Hi everyone, this video is all about the design of flat slab part1 as per is 456 2000 in hindi. Design the exterior panel of a flat slab of size 6 m. This paper guide us how to select drop, panel width, thickness of slab and detailing of. Lecture series on design of reinforced concrete structures by prof. Thin sections allowing for greater roof heights and lighter floors. Introduction to flat slabs modelling of reinforced. Design considerations for reinforced concrete flat slab floor system harshal deshpande1, radhika joshi2. Design of reinforced concrete structures is an introductory design course in civil engineering. Analysis and design of flat slab and grid slab and their cost. Reinforced concrete design 1 design of slab examples.
However, there are some pitfalls to avoid, that often catch out the unwary. For the purposes of design, a typical flat slab panel is divided. However, the complexity of the generalized approach. Simply supported one way slab a rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3. It is desired to design the raft slab shown below to support the column loads for a building as given below. Flat slab analysis, design and detailing pdf civil. Flat slabs may have drop panels at columns and columns may have capitals. A civil engineer must know all the aspects regarding the flat floor system.
Flat slab sized for punching shear and deflection additional reinforcement added to span steel to reduce deflections. Analysis and design of flat slab by aci code with matlab coding. Finite element fe analysis, is a popular powerful computer method of analysing flat slab concrete structures. Flat slab sized for punching shear and deflection additional reinforcement added to span steel to reduce deflections typically 25% extra on a 7. Sathwane studied that the among flat slab, flat slab with drop and grid slab which is economical for the nexus point opposite to vidhan bhavan and beside nmc office. How to build and setup a concrete foundation for garages, houses, room additions, etc part 1 duration. Flexible column arrangements, this is more difficult to achieve for a beamcolumn design. The method is generally applicable where columns are more or less equally spaced. Flat plate concrete floor system does not use beams between columns or.
Flat slab system is an important division of concrete floor system. Design considerations for reinforced concrete flat slab. This study includes complete analysis and design of flat slab as per indian code of practices is456. Keywords flat slab with drop, flat slab without drop, grid slab, drop, column capital i. Oneway and twoway slabs university of asia pacific. Flat slab and grid slab has been analyzed by staad pro. Th e flat slab is often thickened closed to supporting column s to provide adequate strength in shear and to reduce th e. In this course, basic elements governed by bending, shear, axial forces or combination of them are identified and are considered as building blocks of the whole structure. Firstly, one has to check if the design shear force v d is smaller than the maximum punching strength v rd,max. For analysis, the mat is divided into mutually perpendicular strips. These materials are originally located at different websites. 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.
Foreword the reinforced concrete design manual sp1711 is intended to provide guidance and assistance to professionals engaged in the design of castinplace reinforced concrete structures. Bm and sf coefficients for flat slab or 3 or more equal spans outer support. 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. Nancy debora assistant professor civil karunya university 2. Analysis of flat sanalysis of flat sllabab column head l ho l h max l c d h i l h l h, max l ho l h max l c d h ii l h l ho effective dimension of a head, where l ho actual dimension, l. International journal of pure and applied mathematics. Accordingly, main reinforcement is required in the two directions. Punching of flat slabs design for shear at th e column heads 12. Comparative analysis and design of flat and grid slab. The benefits of choosing flat slabs include a minimum depth solution, speed of construction, flexibility in the plan layout both in terms of the shape and. Flat slabs design is appropriate for most floor situations and is also suitable for irregular column layouts, curved floor shapes, ramps etc. Dhang, department of civil engineering, iit kharagpur. Module 5 lectures 17 to 19 mat foundations topics 17. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems.
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