The following example illustrates the design methods presented in the article timesaving design aids for reinforced concrete, part 2. They may be supported on two opposite sides only fig. Simple span reinforced concrete slab bridge rating example. The general criteria used for the design, such as details of material properties are given in a separate report entitled structural design criteria. Flat slabs can offer economical solutions to wider floor spans in a reinforced concrete building. Aug 30, 2014 the design i am going to share with you today is design of flat plate slab as by definition. Flat slabs may have drop panels at columns and columns may have capitals. For 1m slab width, moment, shear force, oneway continuous slab for continuous slab, moment and shear force can be obtained from table 3. Two examples are used to find the effect, of column dimensions, increase on the punching shear failure of flat slab. 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. Flat slab analysis and design pdf flat slab design pdf 1. 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. Beams, see lecture 3 punching shear requirements e.
This pdf file contains a chapter of 23 pages with various aspects of flat slabs including four example of flat slab design. Two way slab design by direct design method as per aci 31811. The efm solution is also used for a detailed comparison with the analysis and design results of the engineering software program spslab. This design is a complete flat plate slab design, from shear to bending along with design of columns and shear head reinforcement. 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. Trimble is an international company focusing on positioningrelated technology for different industries. Design of slab examples and tutorials by sharifah maszura syed mohsin example 1. 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. Analyses are for a onebaywide strip using the equivalent frame analysis method of the aci code. The following example illustrates the example building. The pca computer program pcaslab can be used to expedite the design of different slab systems. 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. Flat slab types of flat slab design and its advantages. Design of slab for flexure 067 m unit width of slab.
Firstly, one has to check if the design shear force v d is smaller than the maximum punching strength v rd,max. 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. Reinforced concrete design 1 design of slab examples. The design i am going to share with you today is design of flat plate slab as by definition. Beside this, due to shear problems at column heads, the thickness of flat slab is greater. Explore flat slab with free download of seminar report and ppt in pdf and doc format. Tn342 design example 2way mondada 093090 adapt corporation. 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. Since this is the input for the the exterior portion of the slab use exterior slab for the name. The following example illustrates the design methods presented in the pca book simplified design.
Guide to the design and construction of reinforced concrete. Design of slab examples and tutorials by sharifah maszura syed mohsin. 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. Design of reinforced concrete structures ii twoway slabs 1 1. European commission joint research centre institute for the protection and security of the citizen contact information address. The reason is that typically with flat slab design examples and theory, the slab is always supported on all 4 edges by a column. Flat plate concrete floor system does not use beams between columns or. Unless otherwise noted, all referenced table, figure, and equation numbers are from that article. Twoway flat plate concrete floor system analysis and design. The slab has to carry a distributed permanent action of 1. Design example of punching shear in slabs eurocode 2. Example 1 the floor of a building constructed of flat slabs is 30.
A civil engineer should study these lectures and materials for structural engineering acumen. Design manual to bs8110 linkstud psr limited co brooks forgings ltd doulton road cradley heath. The building is located in seismic zone iii on a site with medium soil. 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. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. Structures design office lrfd design examples files pdfs. The slab is 300 mm thick and columns are 400 mm square. A second video shows how the shear resistance of the slab and its deflection are checked. Flat slab design tekla structural designer user assistance.
The slab is without drops and is supported internally and on the external long sides by square columns. Sep 03, 2011 reinforced concrete sk 33 section through slab showing stress due to moment. Plan view of floor system assume partitions will not be damaged by deflections. Flat slab design example architectural design civil engineering.
The strip may have up to 20 spans and may have cantilevers at the ends. Those slabs, however, failed at almost twice the design ultimate load, showing the need for more. Flat slab analysis and design designs beamless concrete slab floors flat slab or waffle slab in accordance with aci 318. 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. There are many advantages of flat slab such as increased head room, easier flow of mechanical and electrical services. 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. Flat slab analysis and design free version download for pc. Design of reinforced concrete structures ii twoway slabs. Fanella, which appeared in the october 2001 edition of structural engineer magazine. Analysis and design of slabs two way civil engineers pk.
Flat plate slab is that in which slab is directly supported on columns without column capital, drop panel or beams. Generally, there are two types of slab which are one way and two way slabs. Structural design of flat slabs to eurocode 2 structville. In a flat slab building, you can do a punching shear calculation based on the reaction but, in a slab bridge, a. 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. In the eurocodes, the analysis of flat slab is the same as that recommended in bs 8110. Introduction to bs8110 design worked examples square or circular loaded areas. Punching of flat slabs design for shear at the column heads. Flat slab design example free download as pdf file. 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.
Department of mechanics, materials and structures english. 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. 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. Flat slabs are slabs that are supported directly by columns without floor beams. Pdf irregular flat slabs designed according to the structural. Sachpazis date 18012014 chkd by date appd by 1 flat slab design to bs8110. Designing for shear in slabs including punching shear. Twoway slabs have two way bending unlike oneway slab. Effect of column dimensions on the punching shear of flat slab.
Assume partitions cannot be damaged by deflections. Flat slab analysis, design and detailing pdf civil engineering. Ultimate behavior of oneway spanning slab linear elastic analysis methods such as moment distribution are linear elastic methods. Design an interior panel of a flat slab of size 5 m. 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. Content introduction benefits design considerations design methodology analysis of flat slab detailing 3. 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. Analyze and design flat slab or waffle slab floors. Bending will take place in the two directions in a dishlike form. 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. Equivalent tensile stress design appendix 5 examples using shrinkagecompensating concrete, p. A six storey building for a commercial complex has plan dimensions as shown in figure 1.
The beams reduce the available net clear ceiling height. To see their result for this slab we will find the load factor. 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. View example in pdf format design example 1 download example as a mathcad workbook zip castinplace flat slab bridge design. Would this in your view still be considered as a typical flat slab in terms of design. Therefore, the slab can be reinforced with shear reinforcement complying with detailing rules defined in subclause 7. Twoway joist concrete slab floor waffle slab system. The design shear force v d is below the maximum punching strength v rd,max. Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only.
Flat slab seminar report, ppt, pdf for civil engineering. Feb 07, 2014 a short tutorial showing how the main reinforcement in a simply supported slab is designed using ec2. The lateral loads are independently resisted by shear walls. In this case however, each bay only has two columns on one side, and a rc wall on the other side. 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. 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. The first example, is a flat slab of span 5 by 5 m and the other is of. Simply supported one way slab a rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3. Pdf flat slabs are highly versatile elements widely used in construction, providing minimum depth, fast construction and allowing.
Pdf analysis and design of flat slab and grid slab and. Find the following parameters for design moments in step 2 per unit width step 4 note. Rc slab design ec2 worked example bending reinforcement. The depth of the drop panel is 250 mm and the slab depth is 200 mm. 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.
Ce 433, summer 20 slab design example 1 5 design a one. Flat slab analysis, design and detailing pdf civil. Bending will take place in the two directions in a dishlike fo. Oneway and twoway slabs university of asia pacific. Reinforced concrete sk 33 section through slab showing stress due to moment. Reinforced concrete building design sketch up animation. Reinforced concrete design 1 design of slab examples and. View example in pdf format design example 2 download example as a mathcad workbook zip adhesive anchor examples. However, the complexity of the generalized approach.
Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. 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. Reinforced concrete flat slab structural engineering. 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. These materials are originally located at different websites.
830 1558 643 1374 857 1283 1542 1538 523 764 1569 1241 1440 794 305 704 1385 911 1022 1206 631 1034 1438 969 778 1360 365 1543 419 1058 652 797 742 395 5 120 1157 1038 1471