Oneway simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. Structural concrete structures reinforced concrete construction. For additional explanations on using these tables, refer to the respective handbook editions. Design of one way and two way slabs, design of staircases. Twoway slab with beams design and detailing cac design handbook the concrete floor slab system shown below is for an intermediate floor to be designed considering superimposed dead load 1. Precast is utilized to construct both the superstructure and substructures of all types of bridges. Firstly, begin the design by selecting depth and width of the beam then compute reinforcement area. Download free demo updated august 8, 2019 soilstructure slab on grade software simplifies the calculation of a.
Two kinds of shear may be critical in the design of flat slabs, flat plates, or footings. Twoway concrete floor slab with beams design and detailing design the slab system shown in figure 1 for an intermediate floor where the story height 12 ft, column crosssectional dimensions 18 in. There is a nominal strength that is reduced by a factor which must exceed the factored design stress. Even while designing they are considered as oneslabs with cantilever fixed or continuous at supports. Design of rectangular reinforced concrete beam procedure. Columns transfer vertical loads from a ceiling, floor or roof slab or from a beam, to a floor or foundation. From the slabs, the loads are transferred to the beam.
Selfweight of the column multiplies by number of floors. Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only. Design of reinforced concrete structures ii twoway slabs. Design aid 6 beam design formulas with shear and moment diagrams. For 1m slab width, moment, shear force, oneway continuous slab for continuous slab, moment and shear force can be obtained from table 3. Allowable stress design or working stress design wsd 2. Design values for wood construction asdlrfd american w ood council beam design formulas with shear and moment diagrams american. They may be supported on two opposite sides only fig. Experimental and computational results showed that the wide beam ribs connection is a critical point in the design of the slabs due to the difference in stiffness in the transition zone. Sep 02, 2011 design of reinforced concrete beams 43 2. The main objective of this project is to analyze and design a multistory building 3ddimensional reinforce concrete frame, the design of reinforced concrete slabs, beams, columns, footings and. Absence of beam gives a plain ceiling, thus giving better architectural appearance than in usual cases where beams are used. Design of concrete structures 14th edition, 2009, by arthur h. The 2012 edition of the reinforced concrete design manual sp1711 was developed in accordance with the design provisions of aci 31811, and is consistent with the format of sp1709.
Thereafter, the loads mainly shear from the beams are taken by the columns. For those who do not know what are the des ign requirements of a slab. Design of cantilever slab spreadsheet engineering books. Manual for design and detailing of reinforced concrete to the. Select reinforcing bars for the slab and concentrate bars near the column, if necessary 5. A 2 2area 2 a c 2 2 posttensioned concrete design table 11 list of symbols used in the aci 31808 code cp area enclosed by the outside perimeter of the section, in a g gross area of concrete, in. The lateral loads are independently resisted by shear walls. They are projections from wall face of lintel beams or floor slabs.
Building design and construction of multistory buildings involves a network of highly complex and meticulous processes. Reinforced concrete floor systems normally consist of slabs and beams. Structural design for residential construction cynthia chabot, p. Oneway spanning slabs should be treated as beams of unit width and chapter 2 should be followed except for minimum shear reinforcement. Slabs are usually used in floor and roof construction. A beamandslab system, with a oneway slab, and beams cast compositely with the slab, is a highly efficient floor system. It is imperative to carry out these processes with great care and concern for achieving desired levels of stability conditions. Strength design or ultimatestrength design usd strength design or ultimatestrength design usd with strength design method, the working dead load dl and live load ll are. Rectangular beams and oneway slabs page 2 of 9 two methods. Do not place a phase line within the top flange of a slab beam or adjacent box beam as shown in figure 37. Design and analysis of t and inverted l beams theory and examples dr. Design and analysis of t and inverted l beams theory and. In our case, in few next few days, we shall design slabs, so we shall take here slab only. The design of composite slabs and beams is discussed in detail in relation to the eurocodes and bs 5950.
Design of composite beams using precast concrete slabs. The user is responsible for ensuring that the minimum strength is satisfied. Pdf cantilever slab design ramjan shehzaad academia. Punching of flat slabs design for shear at th e column heads. Reinforced concrete continuous beam analysis and design. Twoway slab analysis and design using equivalent frame method efm. The following sections from the pci design handbook include interaction curves, load tables, and section properties for various precast concrete components. Manual design of beam and raft foundation to eurocode 2. Mongkol jiravacharadet s u r a n a r e e university of technology institute of engineering school of civil engineering moment strength of concrete sections d b as. Even while designing they are considered as one slabs with. This method has been used extensively since 1963 for slabs supported at the edges by walls, steel beams, or monolithic concrete beams. For u beam and x beams, place the phase line as shown in figure 34 and figure 35.
For adjacent slab or box beam superstructures, place the phase line at the edge of the beam, as shown in figure 32 and figure 33. Design and construction guidance related to slimdek construction is dealt with in a separate part of the guide because of the significant number of differences from traditional composite beam and slab construction. Determine the area of steel required in the slab at critical sections for column and middle strips. In addition to general ultimate and serviceability limit state design issues, practical design considerations such as the formation of holes in the slab, support details, fire protection, and attachments to the slab are discussed. Find the following parameters for design moments in step 2 per unit width step 4 note.
For beams, the concrete only works in compression over a rectangular stress block above the n. Chapter 3 design of rectangular beams and oneway slabs. The first is the familiar beam type shear leading to diagonal tension failure. Manual for design and detailing of reinforced concrete to september 20 the code of practice for structural use of concrete 20 contents 1.
Twoway slab with beams design and detailing cac design. Analysis and design of continuous slab and beam footing ubani obinna u. Although a punching shear failure of a wide beam ribbed slab is very similar to that of a solid slab, the shear capacity is reduced. Before going to this topic, please read it there are two types of slab classification based on the direction of bending occurs in these slabs. The input material strengths are taken as the upper limits if they are defined in the material properties as being greater than the limits. Manual design of beam and raft foundation to eurocode 2 free. A reinforced concrete slab is built integrally with its supports and consists of equal span of 15 ft. Manual for design and detailing of reinforced concrete to. The design of concrete beam includes the estimation of cross section dimension and reinforcement area to resist applied loads. A beam and slab system, with a oneway slab, and beams cast compositely with the slab, is a highly efficient floor system. Engineering books excel sheets design of cantilever slab spreadsheet. Design of reinforced concrete structures ii twoway slabs 1 1.
Oneway and twoway slabs university of asia pacific. The building is located in seismic zone iii on a site with medium soil. Department of mechanics, materials and structures english courses reinforced concrete structures code. Bs 8110 concrete design for slab how to pour a concrete slab concrete beam and slab bridge how to pour a 26x36 concrwte concrete slab design of two way slab example pdf flat slab design pdf design of steeltoconcrete joints design manual concrete design concrete design mix design concrete concrete beam design design. Design aid 6 beam design formulas with shear and moment. They also carry bending moments about one or both of the crosssection axes. What is slab, beam, column, and footing construction. Sep 03, 2011 reinforced concrete sk 33 section through slab showing stress due to moment. Design of slab for flexure 067 m unit width of slab. Design the slab following the provisions of the aci code. Design beams if any, using procedures you learned in civl. The general criteria used for the design, such as details of material properties are given in a separate report entitled structural design criteria.
Pro rc design advanced tutorial for beam,column,slab. 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. Due to the fact that this type of construction is not properly covered by the codes of practice, this publication presents design guidance on the interaction and detailing of precast slabs of hollow core or solid plank section that are supported by composite beams or slim floor beams. Lecture series on design of reinforced concrete structures by prof. Llc requires design by a registered professional structural engineer. According to the way loads are transferred to supporting beams and columns, slabs are classified into two types. Direct design method ddm for slab systems with or without beams loaded only. Reinforced concrete floor systems normally consist of slabs and beams that are placed monolithically. Flat slab seminar report, ppt, pdf for civil engineering. Here are the steps for the design procedure for one way slab in steps. The continuous beam along grid 3 is selected to demonstrate the analysis and design of continuous t beams structural analysis, flexural design, shear design, deflection checks and the results of hand calculations are then compared with numerical analysis results obtained from the spbeam engineering software program. Bs 8110 concrete design for slab how to pour a concrete slab concrete beam and slab bridge how to pour a 26x36 concrwte concrete slab design of two way slab example pdf flat slab design pdf design of steeltoconcrete joints design manual concrete design concrete design mix design concrete concrete beam design design of. Reinforced concrete, 2014, 9th edition, aci 31811 code edition, by jack c. You can access tables from previous editions of the handbook as well as the current edition.
Applicable particularly to long narrow slabs or footings, this analysis considers the slab to act as a wide beam. Manual for design and detailing of reinforced concrete to the code. The design is based on hong kong building code hkcop 2004 and its amendment of june 2007. A six storey building for a commercial complex has plan dimensions as shown in figure 1. Practical structural analysis and design of residential buildings using staad pro v8i, csc orion, and manual calculations. Twoway concrete slab with beams spanning between supports. Design values for wood construction asdlrfd american w ood council beam design formulas with shear and moment diagrams. The principal authors of this publication were dr j w rackham, dr g h couchman, and. Flat slabs are twoway slabs supported by pointlike supports. Concrete beam design concrete design software that designs oneway flexural members, including beams, oneway slabs and continue reading.
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. Reinforced concrete beam members strength design for beams sstrength design method is similar to lrfd. Beam design example choose the lightest wide flange steel section available to support a live load of 790 plf and a dead load of 300 plf over a simple span of 18 feet. Bending will take place in the two directions in a dishlike form. Step 2 design forces draw panel of slab and indicate maximum design moments, shears and in. In normal slab and beam or framed construction, torsional rigidity of rc beams may be ignored in the analysis and the torsional stiffness may be given a very small value in the computer analysis. Pro rc designer for beam,column, slab design and dxf. Moduleiii design of short and long columns with axial and eccentric loading, design of isolated column footing. Rectangular beams and oneway slabs page 5 of 9 maximum permissible steel ratio, max an overreinforced beam will fail in a brittle manner while an underreinforced beam will. The slab is designed as a continuous slab, using theory of continuous beams slabs, or the simplified coefficient method where applicable i. Design procedure steps for one way slab slab design steps.
Chapter 3 design of rectangular beams and oneway slabs 12. Dhang, department of civil engineering, iit kharagpur. The two classifications are oneway slab and twoway slab. Bending will take place in the two directions in a dishlike fo. Slab and beam bridge bridge frames supporting precast concrete and steel beams. Pro rc design advanced tutorial for beam,column, slab design.
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