Reinforced concrete, 2014, 9th edition, aci 31811 code edition, by jack c. Parameters needed for calculating the factor f can be found as follows, table i. This help file describes input and analysis features of slab bridge designer 2. This pdf file contains a chapter of 23 pages with various aspects of flat slabs including four example of flat slab design. They are projections from wall face of lintel beams or floor slabs. The following example illustrates the example building. Reinforced concrete design examples civil engineering community. In this scope, the main objective of this paper is to develop a numerical tool that, after being properly validated and tested, enables the 4 and 5 that use rail sections are squared estimation of the static response of a slab track system stedeftm with the purpose of optimizing its structural design behaviour. The 2012 edition of the reinforced concrete design manual sp1711 was developed in accordance.
Concentrated load coefficients for slab case 1 r 0. Design of slab for flexure 067 m unit width of slab. Twoway concrete floor slab with beams design and detailing. Twoway slabs have two way bending unlike oneway slab. Powered by a sophisticated fem solver increasing capacity and substantially speeding up solution for large and complex models, spmats v8. The construction and design of concrete slabs on grade. Recommendations for finite element analysis for the design. Usually balcony slabs are cantilever slab and hence a provision for wall load at free end is included so that the spread sheet is useful for practical purposes. Design of reinforced concrete sections according to en. Analysis and design of slabs two way civil engineers pk. If slab is supported on all four sides and r shorter side longer side rail anchor slab design 3 21 rail anchor slab sliding pn t wdl tan r. The slab has to carry a distributed permanent action of 1.
How to design cantilever slabs in high rise buildings with. 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. Find the following parameters for design moments in step 2 per unit width step 4 note. Many alternative types of castinplace concrete slab construction are available. Structural consideration in design of reinforced concrete. According to art of design and uses of materials there are following methods. In order to simplify the analysis and to be able to use the superposition principle for evaluating the effect of load combinations, linear analysis is generally adopted even though concrete slabs normally have a pronounced nonlinear response. National conference on recent trends in engineering. Slabs having supports on less than four sides can be designed as oneway. N c,f 0,85 f cd b h c reduced plastic moment resistance of the sheeting. Design of reinforced concrete slab with regard to explosions.
Asce, secb course content slab on grades construction. Drawing shows typical slab structure detail through plan, sections and required legendguidelines. Seismic design of reinforced concrete special moment frames. Projected cost for flat slab without drop slab is 29 % higher than with drop slab. Many of these earlier design aids intended to carry out relatively simple design calculations were eliminated in the sp1709 edition. Simply supported one way slab a rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3. Structural steel composite slab 1 of 7 rev design project. Slab design reading assignment chapter 9 of text and, chapter of aci31802 introduction aci318 code provides two design procedures for slab systems. Total moment in slabs supported on circular column capitals 0 moments at design sections of slabs supported on. The construction and design of concrete slabs on grade d. This spread sheets is useful for design of cantilever slab as per is 456. The finite element method is commonly used to design the reinforcement in concrete slabs. Also punching shear stress is reduced by adopting drop at slabcolumn connection.
Firstly, one has to check if the design shear force v d is smaller than the maximum punching strength v rd,max. As per the cost comparison for flat slab panel 6mx6m for with drop and without drop, the results show that from economic point of view slab with drop provision is preferable. Twoway concrete slab on beams floor analysis and design. The wire reinforcing institute recommends the use of the subgrade drag theory for slabs up to 150 feet in length. Design of reinforced concrete slab with regard to explosions master of science thesis in the masters programme structural engineering and building performance design rickard augustsson markus harenstam department of civil and environmental engineering division of structural engineering concrete structures chalmers university of technology. Apr 15, 2017 download code design of cantilever slab. When designing and detailing any reinforcement, the structural designer should ensure that the specified bars can be located within the available depth of slab. Design compressive normal force in the concrete flange. In each case the applicable limitations given in 31. The program covers wide range of twoway slab systems and can be used for more complex slab layouts. The cross section of the profiled sheeting is shown in fig. Due to simplicity of design and construction, the concrete slab structure is relatively economical.
Reinforced concrete design examples civil engineering. Aci 360, design of slabsongrade, refers to this as a type b slab. Minimum slab thickness of rc slab to prevent undesirable. Design of slab examples and tutorials by sharifah maszura syed mohsin example 1. Typical slab reinforcement detail with the detail of distribution bar, spacing between bars etc. 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. Mar 05, 2015 reinforced concrete design examples chapter 1 reinforced concrete structures, introduction, reinforced concrete members, download.
The appropriate ratio may be obtained from table 3. Recommendations for finite element analysis for the design of. The design shear force v d is below the maximum punching strength v rd,max. If slab is supported on all four sides and r shorter side longer side slab. Reinforced concrete sk 33 section through slab showing stress due to moment. 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.
In twoway slabs shorter direction strip carry greater %age of load. Design example on composite steel deck floor slabs by thomas j. Mu ct mr nchrp report 663 73,74 mr ls ha test level tl. Its limitation lies in the practical range of span lengths and. Pdf shear capacity of reinforced concrete slabs under. Analysis and design of slabs one way civil engineers pk. The axial force, moments and shears for a particular strip are recovered from the analysis on the basis of the wood armer tech. Reinforced concrete design 1 design of slab examples and. Design the slab system shown in figure 1 for an intermediate floor where the. Reinforced concrete design 1 design of slab examples. Reinforced concrete, slab, beam, explosion, impulse load, dynamic.
Mccabe1 the enclosed example is presented to demonstrate the intent and use of the aisi tentative recommendations for the design of composite steel deck slabs, and hereafter will be referred to as the criteria. Hello, although question is incomplete as essentials details are not provided,if better to be building planelevation is provided then solution will be more exact. Flat slab analysis, design and detailing pdf civil engineering. Reinforced concrete design examples chapter 1 reinforced concrete structures, introduction, reinforced concrete members, download. Sep 03, 2011 reinforced concrete sk 33 section through slab showing stress due to moment.
Composite slab worked example 1 made by sssr date 140500 structural steel design project calculation sheet checked by pu date 080800 check the adequacy of the continuous composite profiled deck slab with spans of 3. Time saving design aids twoway slabs page 6 of 14 the pca computer program pcaslab can be used to expedite the design of different slab systems. Sci p300 composite slabs and beams using steel decking best. Aug 28, 2016 cantilever slabs are a typical one way slabs. Civilax is the knowledge base covering all disciplines in civil engineering. The design approach for structures submitted to explosions differ from the common statically approach and are not well documented.
Typical slab reinforcement structure design detail. Use lysaght bondek design soware for support widths other than 100mm. Methods of analysis and design it shall be permissible to design the slab system by one of the following methods. Introduction concrete slabs on grade are a very common type of concrete construction. Flat slab analysis, design and detailing pdf civil. Floor slabs can range from a simple residential basement slab to a heavyduty industrial floor. Explanatory text was added to each chapter, while maintaining relevant design aids and illustrative examples. A guide for practicing engineers applied technology council. This article discusses the similarities and differences between traditional frame methods and finite element methods for the design of floor slab systems. The seismic performance, shortfalls in design and detailing methods of slabs with holes are explained. Still i must say,cantiver span 810 m will be failed in deflection in case of rcc bu. Note we need to calculate the typical ls for the 1 st half only, for the 2 nd half we will multiply it by 2 excluding the main bar circular slab reinforcement calculation. Design of reinforced concrete sections according to en 199211 and en 19922 brno, 25. The locations of the strips are usually governed by the locations of the slab supports.
Structural modeling and analysis of concrete floor slabs. Only the conditions at the centre of the span in the width of slab under consideration should be considered to influence deflection. Even while designing they are considered as oneslabs with cantilever fixed or continuous at supports. Example 12 rail anchor slab design 2 21 rail anchor slab overturning mn. Design methods, holes in slabs, seismic performance. Design of cantilever slab civil engineering community. The output of the program for the slab in the example is shown in the following pages. Sachpazis date 18012014 chkd by date appd by 1 flat slab design to bs8110.
42 1552 1579 982 887 488 988 1536 1434 1160 936 938 550 1436 712 822 97 584 892 1038 1123 176 860 1165 966 824 683 444 321