The strip may have up to 20 spans and may have cantilevers at the ends. Explore flat slab with free download of seminar report and ppt in pdf and doc format. Firstly, one has to check if the design shear force v d is smaller than the maximum punching strength v rd,max. Reinforced concrete design 1 design of slab examples. The pca computer program pcaslab can be used to expedite the design of different slab systems. Flat plate slab is that in which slab is directly supported on columns without column capital, drop panel or beams. 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 slabs are slabs that are supported directly by columns without floor beams. Analyze and design flat slab or waffle slab floors. Guide to the design and construction of reinforced concrete.
Flat slab analysis and design free version download for pc. The beams reduce the available net clear ceiling height. Reinforced concrete flat slab structural engineering. The following example illustrates the example building. Flat slab analysis and design pdf flat slab design pdf 1. The slab is without drops and is supported internally and on the external long sides by square columns.
Example 1 the floor of a building constructed of flat slabs is 30. 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. Slab resting on walls or sufficiently deep and rigid beams on all sides. The following example illustrates the design methods presented in the pca book simplified design. Flat slab seminar report, ppt, pdf for civil engineering. A civil engineer should study these lectures and materials for structural engineering acumen. Beside this, due to shear problems at column heads, the thickness of flat slab is greater. Flat slab design example architectural design civil engineering. View example in pdf format design example 2 download example as a mathcad workbook zip adhesive anchor examples. These materials are originally located at different websites.
Sachpazis date 18012014 chkd by date appd by 1 flat slab design to bs8110. Equivalent tensile stress design appendix 5 examples using shrinkagecompensating concrete, p. The depth of the drop panel is 250 mm and the slab depth is 200 mm. 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. Design of reinforced concrete structures ii twoway slabs 1 1. Ce 433, summer 20 slab design example 1 5 design a one. Assume partitions cannot be damaged by deflections. The efm solution is also used for a detailed comparison with the analysis and design results of the engineering software program spslab. A short tutorial showing how the main reinforcement in a simply supported slab is designed using ec2. Reinforced concrete design 1 design of slab examples and.
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. Beams, see lecture 3 punching shear requirements e. European commission joint research centre institute for the protection and security of the citizen contact information address. Would this in your view still be considered as a typical flat slab in terms of design. Design of slab examples and tutorials by sharifah maszura syed mohsin. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. Department of mechanics, materials and structures english. 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 following example illustrates the design methods presented in the article timesaving design aids for reinforced concrete, part 2. Pdf flat slabs are highly versatile elements widely used in construction, providing minimum depth, fast construction and allowing. The building is located in seismic zone iii on a site with medium soil. Two examples are used to find the effect, of column dimensions, increase on the punching shear failure of flat slab. Flat plate concrete floor system does not use beams between columns or.
To see their result for this slab we will find the load factor. Flat slab types of flat slab design and its advantages. Oneway and twoway slabs university of asia pacific. In the eurocodes, the analysis of flat slab is the same as that recommended in bs 8110. The design i am going to share with you today is design of flat plate slab as by definition. Shear walls are permitted to be calculated by principles of mechanics without limitations by using values for nail strength given in the nds and wood structural panel design properties given in the apapds. Two way slab design by direct design method as per aci 31811, step by step procedure and limitations of direct design method for two way slab is presented. Simple span reinforced concrete slab bridge rating example. Unless otherwise noted, all referenced table, figure, and equation numbers are from that article. This report is intended to serve as a manual of good practice for the design of prestressed concrete flat slabs in addition to the recommended procedures, other methods are described for the sake of completeness and to compare different methods of design. Plan view of floor system assume partitions will not be damaged by deflections. Flat slab design tekla structural designer user assistance. Design an interior panel of a flat slab of size 5 m.
Content introduction benefits design considerations design methodology analysis of flat slab detailing 3. The slab is 300 mm thick and columns are 400 mm square. Aug 27, 2015 guide to the design and construction of reinforced concrete flat slabs contents membersof the projectsteeringgroup list of tables vii iv list of figures v 1. The first example, is a flat slab of span 5 by 5 m and the other is of. 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.
The lateral loads are independently resisted by shear walls. Introduction to bs8110 design worked examples square or circular loaded areas. Tn342 design example 2way mondada 093090 adapt corporation. Effect of column dimensions on the punching shear of flat slab. They may be supported on two opposite sides only fig. Designing for shear in slabs including punching shear.
Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only. There are many advantages of flat slab such as increased head room, easier flow of mechanical and electrical services. Flat slabs can offer economical solutions to wider floor spans in a reinforced concrete building. 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. For the flat slab with the general arrangement as shown below, let us design the punching shear for column b1 given the following design information. Design of slab for flexure 067 m unit width of slab. 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. 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. Punching of flat slabs design for shear at the column heads. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. Since this is the input for the the exterior portion of the slab use exterior slab for the name. 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. Analysis and design of slabs two way civil engineers pk.
The general criteria used for the design, such as details of material properties are given in a separate report entitled structural design criteria. Analysis of flat sanalysis of flat sllab ab 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. Design of slab examples and tutorials by sharifah maszura syed mohsin example 1. Bending will take place in the two directions in a dishlike form. Therefore, the slab can be reinforced with shear reinforcement complying with detailing rules defined in subclause 7. Twoway flat plate concrete floor system analysis and design. Flat slab analysis and design designs beamless concrete slab floors flat slab or waffle slab in accordance with aci 318. The slab has to carry a distributed permanent action of 1. 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. However, the complexity of the generalized approach. Structural design of flat slabs to eurocode 2 structville. The reason is that typically with flat slab design examples and theory, the slab is always supported on all 4 edges by a column. The equivalent frame method efm presented in aci 31814 is illustrated in detail in this example to analyze and design twoway flat slab with drop panels system. Flat slab analysis, design and detailing pdf civil engineering.
Feb 07, 2014 a short tutorial showing how the main reinforcement in a simply supported slab is designed using ec2. Pdf irregular flat slabs designed according to the structural. Ce 433, fall 2006 slab design example 1 6 design a oneway slab for an exterior bay of a multistory office building using the information specified below. Pdf analysis and design of flat slab and grid slab and.
Rc slab design ec2 worked example bending reinforcement. Analyses are for a onebaywide strip using the equivalent frame analysis method of the aci code. Flat slabs may have drop panels at columns and columns may have capitals. This design is a complete flat plate slab design, from shear to bending along with design of columns and shear head reinforcement. Bending will take place in the two directions in a dishlike fo. Design example of punching shear in slabs eurocode 2. Design manual to bs8110 linkstud psr limited co brooks forgings ltd doulton road cradley heath. In this case however, each bay only has two columns on one side, and a rc wall on the other side.
Reinforced concrete sk 33 section through slab showing stress due to moment. Sep 03, 2011 reinforced concrete sk 33 section through slab showing stress due to moment. Oneway simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. Two way slab design by direct design method as per aci 31811. A six storey building for a commercial complex has plan dimensions as shown in figure 1. Fanella, which appeared in the october 2001 edition of structural engineer magazine. Aug 30, 2014 the design i am going to share with you today is design of flat plate slab as by definition. View example in pdf format design example 1 download example as a mathcad workbook zip castinplace flat slab bridge design. This report presents the structural engineering calculations of a posttensioned flat slab supported on columns, using hong kong building code hkcop 2004 and its amendment of june 2007. This pdf file contains a chapter of 23 pages with various aspects of flat slabs including four example of flat slab design.
Flat slab analysis, design and detailing pdf civil. Trimble is an international company focusing on positioningrelated technology for different industries. Simply supported one way slab a rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3. Twoway joist concrete slab floor waffle slab system analysis and design design the concrete floor slab system shown below for an intermediate floor with partition weight of 50 psf, and unfactored live load of 100 psf. Design manual to bs8110 outline of the bs8110 design process outline of the bs8110 design process calculate vc concrete shear capacity without reinforcement the design process for the now withdrawn bs8110 design standard works slightly differently to that used in. Those slabs, however, failed at almost twice the design ultimate load, showing the need for more. Structures design office lrfd design examples files pdfs. 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. Design of reinforced concrete structures ii twoway slabs. Twoway slabs have two way bending unlike oneway slab. Generally, there are two types of slab which are one way and two way slabs.
Reinforced concrete building design sketch up animation. Flat slab design example free download as pdf file. To make the slab design independent of the type of rail, we will place the wheel load 1 from the nominal face of the rail 1ft from the edge of the slab. Find the following parameters for design moments in step 2 per unit width step 4 note. A second video shows how the shear resistance of the slab and its deflection are checked. Twoway joist concrete slab floor waffle slab system. Ultimate behavior of oneway spanning slab linear elastic analysis methods such as moment distribution are linear elastic methods. In a flat slab building, you can do a punching shear calculation based on the reaction but, in a slab bridge, a.
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