Firstly, one has to check if the design shear force v d is smaller than the maximum punching strength v rd,max. The slab is supported on beams of size 225 x 500 mm spaced at 4. Flat slab analysis, design and detailing pdf civil. Excel sheet to design flat slab according to eurocode. Flat slab seminar report, ppt, pdf for civil engineering. The slab is without drops and is supported internally and on the external long sides by square columns. Designing for shear in slabs including punching shear. A second video shows how the shear resistance of the slab and its deflection are checked. Flat slabs can offer economical solutions to wider floor spans in a reinforced concrete building. Supported by walls a 0 no beams for beam supported slabs a examples and tutorials by sharifah maszura syed mohsin example 2. Reinforced concrete design 1 design of slab examples and. Feb 07, 2014 a short tutorial showing how the main reinforcement in a simply supported slab is designed using ec2. The 2012 edition of the reinforced concrete design manual sp1711 was developed in accordance. There are many advantages of flat slab such as increased head room, easier flow of mechanical and electrical services.
Most designs space the joints no more than 20 ft apart. Design of slabs 1 suranaree university of technology. This design is a complete flat plate slab design, from shear to bending along with design of columns and shear head reinforcement. 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. Bm and sf coefficients for flat slab or 3 or more equal spans outer support. A flat slab is a reinforced concrete slab supported directly by concrete columns without the. Nancy debora assistant professor civil karunya university 2. Flat slab analysis, design and detailing pdf civil engineering. Looks at cracking which can occur in pilesupported slabs, covering structural design, the differences between pilesupported, groundsupported and elevated suspended slabs, suggestions for slab designers, procedures and alternative design strategies.
Floors and screeds design and construction of pile. The yield line theory ylt has been quite used for the design of sfrc slabs supported on soil 3. Comprehensive design example for prestressed concrete psc. Oct 05, 2019 a flat slab is a reinforced concrete slab supported directly by concrete columns without the use of beams.
Introduction floor slabs, in foundations, are mainly sorted into two categories, concrete slabs on grade or pile supported concrete slabs. Designing and constructing around utilities indiana department of transportation. Manual for design of slabs, pile caps and footings. Two examples, one of a flat slab and one of a foundation raft, illustrate the design of these structures and the application of the present recommendations. Manual for design and detailing of reinforced concrete to the code. Design of slabs 1 oneway slab oneway slab twoway slab flat plate slab flat slab grid slab. Design and construction of pilesupported concrete industrial floors piled floors in distribution centres are attracting unfavourable attention among developers and building owners and there is some nervousness about the commonly used steelfibrereinforced concrete sfrc.
Oneway and twoway slabs oneway slabs transfer the imposed. Pile supported foundation pile cap analysis and design based on a geotechnical study, a pile supported foundation is required to support a heavily loaded building column. Explore flat slab with free download of seminar report and ppt in pdf and doc format. Jointed floors with steel fibers in these floors, closelyspaced sawcut joints form the main defense against random cracks. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. Flat slab haunched slab a longitudinal slab is one of the least complex types of bridge superstructures.
Flat slab design spreadsheets to eurocode excel sheets. Pileslab structure roadbed is a new form of ballastless track for high speed railway. Oneway and twoway slabs university of asia pacific. The design i am going to share with you today is design of flat plate slab as by definition.
Flat slabs are slabs that are supported directly by columns without floor beams. Joint research centre, via enrico fermi 2749, tp 480, 21027 ispra va, italy. Flat slab sized for punching shear and deflection additional reinforcement added to span steel to reduce deflections typically 25% extra on a 7. Flat slab is a reinforced concrete slab supported directly by concrete columns without. Guide to design of simply supported slabs design of rcc. Pile partially fabricreinforced slab top and bottom combined moment and shear reinforcement pile head. 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. The design follows the regulations in bkr 4 and bbk 5. 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. Hence in warehouses, offices and public halls some times beams are avoided and slabs are directly supported by columns.
Pile grids are normally in the range 3 x 3m to 5 x 5m, depending on the pile capacities and the intensity of loading. Steepen slope, but make certain clear zone hazard is not created 2. Design method of pileslab structure roadbed of ballastless. Design and construction of pile supported concrete industrial floors piled floors in distribution centres are attracting unfavourable attention among developers and building owners and there is some nervousness about the commonly used steelfibrereinforced concrete sfrc designs. Flat slab types of flat slab design and its advantages. Aug 30, 2014 the design i am going to share with you today is design of flat plate slab as by definition. Design methodology design methodology simplified method table 3. Continuous one way slab figure 1 shows a clear area of 12 m x 8. Due to lack of corresponding design code, based on the analysis of its structure characteristics and application requirements, it is proposed to carry out load effect combination according to ultimate limit state and serviceability limit state, and the most unfavorable combination of each state is. Structurepoint, formerly the pca engineering software group, offers concrete design software programs updated to aci 31814 for concrete buildings, concrete structures and concrete tanks. 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. Therefore, the slab can be reinforced with shear reinforcement complying with detailing rules defined in subclause 7.
This student guide is intended as just that a guide for students of civil engineering. Chapter 18 concrete slab structures january 2019 183 18. Reinforced concrete structural software includes programs for column design pcacolumn, beam design pcabeam, slab design pcaslab, wall design pcawall, mat design pcamats, foundation design. The load paths for both the flat plate and the edge supported slabs are, however, essentially the same. Powered by a sophisticated fem solver increasing capacity and substantially speeding up solution for large and complex models, spmats v8. 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. Design example of punching shear in slabs eurocode 2. They may be supported on two opposite sides only fig.
Department of mechanics, materials and structures english. The deck consisted of a flat slab supported on rectangular pile cap beams. Excel sheet to design flat slab common practice of design and construction is to support the slabs by beams and support the beams by columns. Foundations this chapter discusses the primary issues related to designing foundations for residential buildings in coastal areas. Instructional materials complementing fema p751, design examples foundation design 3. Notice that neither the piles nor the abutment beam are infinitely rigid. This article refers to the latter category of slabs. The linkstudpsr system comprises short lengths of carbon steel deformed bar. 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 column layout, a flat soffit clean finishes and freedom of layout of services and scope and. Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only. Design of raft foundation using orion v18 software. The imposed loading on the floor is 5 knm2 and an allowance of 2.
Flat slabs are twoway slabs supported by pointlike supports. It is assumed that the ground gives no support but simply acts as in situ formwork for the floor slab. Approved by the former fip commission 3 practical design and the fip council, it is hoped that these recommendations will facilitate the correct design of posttensioned slabs and. Design of slab examples and tutorials by sharifah maszura syed mohsin example 2. Sep 27, 2017 flat slabs design is appropriate for most floor situations and is also suitable for irregular column layouts, curved floor shapes, ramps etc. Floors and screeds design and construction of pile supported. Ultimate behavior of oneway spanning slab linear elastic analysis methods such as moment distribution are linear elastic methods. Force on a pile eq on unloaded pile pile supporting structure.
To see their result for this slab we will find the load factor. Their support and expertise is critical to this project and is greatly. Recently, a formulation based on the ylt was developed for the design of esfrc slabs 4. Explanatory text was added to each chapter, while maintaining relevant design aids and illustrative examples. Pile supported slabs are considered as deep foundations and are introduced after geotechnical investigations have determined that the ground is inadequate for a ground supported slab. A short tutorial showing how the main reinforcement in a simply supported slab is designed using ec2. Pile supported foundation pile cap analysis and design.
The design shear force v d is below the maximum punching strength v rd,max. Reinforced concrete design s u r a n a r e e institute of engineering university of technology school of civil engineering. The design process for the now withdrawn bs8110 design standard works slightly differently to that used in the new ec2 bs en 199211. Therefore, loads on the piles due to live loads are affected by the location of the live load across the width of the integral abutment. Design the pile cap shown in the following figure with 12 in. Pdf influence of the pile stiffness on the ground slab. The girder reactions, interior and exterior, are required for the design of the abutment pile cap. The benefits of using flat slab construction are becoming increasingly recognized. Cracking in pilesupported ground slabs the construction. Flat plate slab is that in which slab is directly supported on columns without column capital, drop panel or beams.
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. Use it as you see fit, but please note that there is no technical support available to answer any questions about. Mar 07, 2017 rcc slab design depends on the on the dimensions of the slab after which the slab is termed as a oneway slab or a twoway slab in the design of rcc structures, column design and beam design are to be done before we start with rcc slab design basic rules followed in the design of simply supported slab thickness of slab. A flat slab is a reinforced concrete slab supported directly by concrete columns without the use of beams. The method has proved to compete and give trustworthy designs in the construction of pile supported suspended slabs used in several realized projects, see table 1. Looks at cracking which can occur in pile supported slabs, covering structural design, the differences between pile supported, ground supported and elevated suspended slabs, suggestions for slab designers, procedures and alternative design strategies. Pile slab structure roadbed is a new form of ballastless track for high speed railway. The design is the same as for suspended floors, using the approaches in bs 8110, now withdrawn and superceded by eurocode 2. Structural design of flat slabs to eurocode 2 structville. 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. The efm solution is also used for a detailed comparison with the analysis and design results of the engineering software program spslab. In uence of the pile stiffness on the ground slab behaviou r are signi cantly higher than those derived by din 1054 2010 figs 3 and 8 comodromos et al. Aci 360, guide to design of slabs onground describes these floors as slabs. This pdf file contains a chapter of 23 pages with various aspects of flat slabs including four example of flat slab design.
European commission joint research centre institute for the protection and security of the citizen contact information address. 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. Rcc slab design depends on the on the dimensions of the slab after which the slab is termed as a oneway slab or a twoway slab in the design of rcc structures, column design and beam design are to be done before we start with rcc slab design basic rules followed in the design of simply supported slab thickness of slab. Flat slabs design is appropriate for most floor situations and is also suitable for irregular column layouts, curved floor shapes, ramps etc. Structure of the guide introduction to pile foundations pile foundation design load on piles. Column pileslab connections include drop capcolumn, flat slabcolumn. Midas gen ppost tensioned flat slab, meshed slab and beam. Reinforced flat slab design spreadsheet flat slab system is an important division of concrete floor system. Flat plate slabs the edge beams have the same depth as the remainder of the slab panel, and therefore the system tends to be less stiff and more prone to serviceability problems. Many of these earlier design aids intended to carry out relatively simple design calculations were eliminated in the sp1709 edition. Lateral load distribution in oneway flat slabs dtic. Where pilesupported slabs are used, the subbase is assumed to recede in the longterm, leaving the slab supported solely by the piles. 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.1436 1490 1552 1237 354 202 620 1215 1098 876 1461 341 1205 384 1037 318 542 137 1252 124 605 1027 260 1253 540 760 1290 569 323 383 818 1577 125 1185 1213 895 1478 1071 737 713 415