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. Find the following parameters for design moments in step 2 per unit width step 4 note. A short tutorial showing how the main reinforcement in a simply supported slab is designed using ec2. 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. In the eurocodes, the analysis of flat slab is the same as that recommended in bs 8110. Flat slab design tekla structural designer user assistance. Since this is the input for the the exterior portion of the slab use exterior slab for the name.
Department of mechanics, materials and structures english. Bending will take place in the two directions in a dishlike fo. Analyze and design flat slab or waffle slab floors. Feb 07, 2014 a short tutorial showing how the main reinforcement in a simply supported slab is designed using ec2. The first example, is a flat slab of span 5 by 5 m and the other is of. Flat slab analysis and design pdf flat slab design pdf 1. Design example of punching shear in slabs eurocode 2. 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. 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. Twoway joist concrete slab floor waffle slab system. Sachpazis date 18012014 chkd by date appd by 1 flat slab design to bs8110. The following example illustrates the example building. In this case however, each bay only has two columns on one side, and a rc wall on the other side.
Example 1 the floor of a building constructed of flat slabs is 30. Flat slab analysis, design and detailing pdf civil. Unless otherwise noted, all referenced table, figure, and equation numbers are from that article. Therefore, the slab can be reinforced with shear reinforcement complying with detailing rules defined in subclause 7. 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. Analyses are for a onebaywide strip using the equivalent frame analysis method of the aci code. Two examples are used to find the effect, of column dimensions, increase on the punching shear failure of flat slab. Ultimate behavior of oneway spanning slab linear elastic analysis methods such as moment distribution are linear elastic methods. Flat slabs are slabs that are supported directly by columns without floor beams. Flat slab design example free download as pdf file. Pdf analysis and design of flat slab and grid slab and.
Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. A six storey building for a commercial complex has plan dimensions as shown in figure 1. Punching of flat slabs design for shear at the column heads. Rc slab design ec2 worked example bending reinforcement. Flat slab analysis, design and detailing pdf civil engineering. The pca computer program pcaslab can be used to expedite the design of different slab systems.
Flat slab analysis and design free version download for pc. These materials are originally located at different websites. A second video shows how the shear resistance of the slab and its deflection are checked. Pdf flat slabs are highly versatile elements widely used in construction, providing minimum depth, fast construction and allowing. Bending will take place in the two directions in a dishlike form. Flat slab analysis and design designs beamless concrete slab floors flat slab or waffle slab in accordance with aci 318. Design manual to bs8110 linkstud psr limited co brooks forgings ltd doulton road cradley heath. Effect of column dimensions on the punching shear of flat slab. View example in pdf format design example 1 download example as a mathcad workbook zip castinplace flat slab bridge design. 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 of reinforced concrete structures ii twoway slabs 1 1. Reinforced concrete design 1 design of slab examples.
The strip may have up to 20 spans and may have cantilevers at the ends. Guide to the design and construction of reinforced concrete. Design of reinforced concrete structures ii twoway slabs. Reinforced concrete sk 33 section through slab showing stress due to moment. 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. Pdf irregular flat slabs designed according to the structural. 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. In a flat slab building, you can do a punching shear calculation based on the reaction but, in a slab bridge, a. Structures design office lrfd design examples files pdfs. Design of slab examples and tutorials by sharifah maszura syed mohsin. The efm solution is also used for a detailed comparison with the analysis and design results of the engineering software program spslab. 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. The lateral loads are independently resisted by shear walls.
A civil engineer should study these lectures and materials for structural engineering acumen. Slab resting on walls or sufficiently deep and rigid beams on all sides. For 1m slab width, moment, shear force, oneway continuous slab for continuous slab, moment and shear force can be obtained from table 3. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. To see their result for this slab we will find the load factor. Plan view of floor system assume partitions will not be damaged by deflections. 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.
The slab is 300 mm thick and columns are 400 mm square. Caprani civil engineering design 1 analysis and design of slabs 20067 dr. Simply supported one way slab a rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3. Reinforced concrete building design sketch up animation. Content introduction benefits design considerations design methodology analysis of flat slab detailing 3. Flat slab seminar report, ppt, pdf for civil engineering. Structural design of flat slabs to eurocode 2 structville. Generally, there are two types of slab which are one way and two way slabs. Flat slab design example architectural design civil engineering. The beams reduce the available net clear ceiling height. 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 following example illustrates the design methods presented in the pca book simplified design. The slab has to carry a distributed permanent action of 1. The design i am going to share with you today is design of flat plate slab as by definition.
Flat plate slab is that in which slab is directly supported on columns without column capital, drop panel or beams. The following example illustrates the design methods presented in the article timesaving design aids for reinforced concrete, part 2. Oneway simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. 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. Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only. The building is located in seismic zone iii on a site with medium soil. Design of slab for flexure 067 m unit width of slab.
The slab is without drops and is supported internally and on the external long sides by square columns. View example in pdf format design example 2 download example as a mathcad workbook zip adhesive anchor examples. 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. Reinforced concrete flat slab structural engineering. This design is a complete flat plate slab design, from shear to bending along with design of columns and shear head reinforcement. 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 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.
Assume partitions cannot be damaged by deflections. 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. European commission joint research centre institute for the protection and security of the citizen contact information address. This pdf file contains a chapter of 23 pages with various aspects of flat slabs including four example of flat slab design. The general criteria used for the design, such as details of material properties are given in a separate report entitled structural design criteria. Sep 03, 2011 reinforced concrete sk 33 section through slab showing stress due to moment.
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. Aug 30, 2014 the design i am going to share with you today is design of flat plate slab as by definition. 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. Simple span reinforced concrete slab bridge rating example. 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. There are many advantages of flat slab such as increased head room, easier flow of mechanical and electrical services. Would this in your view still be considered as a typical flat slab in terms of design.
However, the complexity of the generalized approach. The reason is that typically with flat slab design examples and theory, the slab is always supported on all 4 edges by a column. Design of slab examples and tutorials by sharifah maszura syed mohsin example 1. 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. The design shear force v d is below the maximum punching strength v rd,max. Introduction to bs8110 design worked examples square or circular loaded areas. They may be supported on two opposite sides only fig. Two way slab design by direct design method as per aci 31811. Flat slabs can offer economical solutions to wider floor spans in a reinforced concrete building. Designing for shear in slabs including punching shear. 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. Firstly, one has to check if the design shear force v d is smaller than the maximum punching strength v rd,max.
Twoway slabs have two way bending unlike oneway slab. Trimble is an international company focusing on positioningrelated technology for different industries. Tn342 design example 2way mondada 093090 adapt corporation. 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. Oneway and twoway slabs university of asia pacific. Ce 433, summer 20 slab design example 1 5 design a one. Explore flat slab with free download of seminar report and ppt in pdf and doc format. Reinforced concrete design 1 design of slab examples and. Design an interior panel of a flat slab of size 5 m. Flat slab types of flat slab design and its advantages.