Design of flat slab via safe prog pdf

Punching strength of reinforced concrete flat slabs without shear. Flat slab design spreadsheets to eurocode 2 en 19921. Design of reinforced concrete structures ii twoway slabs 1 1. However, there are some pitfalls to avoid, that often catch out the unwary. Analyses are for a onebaywide strip using the equivalent frame analysis method of the aci code.

Flat slab seminar report, ppt, pdf for civil engineering. 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. Design considerations for reinforced concrete flat slab. Design of flat slabs using various codes, international. Analysis of posttensioned flat slab by using safe shriraj s. Flat slab analysis, design and detailing pdf civil. Explore flat slab with free download of seminar report and ppt in pdf and doc format. From framing layout to detail drawing production, safe integrates every aspect of the engineering design process in one easy and intuitive environment. Pdf design of reinforced concrete flat slab with drop. Oneway and twoway slabs university of asia pacific. Standard strategies and rules concerning the safety of concrete structures in case of. 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.

Punching of flat slabs design for shear at th e column heads 12. Flat slab design in safe civil engineering community. The prokon suite includes a series of modules for designing concrete elements. Guide to the design and construction of reinforced. Reinforced concrete design 1 design of slab examples. Analysis and design of slabs two way civil engineers pk. Department of mechanics, materials and structures english courses. Without beams, flat plates and flat slabs tests of flat plate structures indicate that in most practical cases, the capacity is governed by shear. 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. The punching shear check and design in safe considers column location, openings, and slab edges. The institution of structural engineers the institution of civil engineers march 2000 manual for the design of reinforced concrete building structures to ec2. Chapter 3 design of rectangular beams and oneway slabs 12.

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. Analysis and design of flat slab by aci code with matlab. However, as an upperbound method, poorly conceived collapse mechanisms lead to. The strip may have up to 20 spans and may have cantilevers at the ends. We aim to close the gap to the industry by improving the awareness about latest trends in civil engineering. Jul 18, 2014 civildigital powerpoint presentations building technology flat slab floor system. 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. Jan 17, 2017 civilax is the knowledge base covering all disciplines in civil engineering. There are two methods of analysis of rc flat slab viz. An analysis of an example flat slab structure shows that such an approach makes. 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. Pdf yield line analysis of reinforced concrete slabs.

The intent of this tutorial is to give you handson experience via stepbystep instructions on how to use safe to model, analyze, design and detail mild reinforced concrete slabs. Flat slab sized for punching shear and deflection additional reinforcement added to span steel to reduce deflections typically 25% extra on a 7. Tests of flat plate structures indicate that in most practical cases, the capacity is governed by shear. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. The report generator features include an indexed table of. The general criteria used for the design, such as details of material properties are given in a separate report entitled structural design criteria. Twoway flat slab concrete floor with drop panels system. The yield line technique is the conventional method for predicting the collapse load of reinforced concrete slabs. Design of reinforced concrete structures ii twoway slabs. Twoway slabs have two way bending unlike oneway slab. Interpreting the slab analysis result using safe program is the last stage to consider in the design of the slab using safe.

Rectangular beams and oneway slabs page 5 of 9 maximum permissible steel ratio, max an overreinforced beam will fail in a brittle manner while an underreinforced beam will. Flat slab analysis, design and detailing pdf civil engineering. Safe is the ultimate tool for designing concrete floor and foundation systems. Bubble deck slab is a method of virtually eliminating all concrete from the middle of a floor slab, which is not. The design shear force can be reduced to account for the loads applied inside the outer perimeter. Finite element design without strips is also available and useful for slabs with complex geometries.

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. Beside this, due to shear problems at column heads, the thickness of flat slab is greater. Flat slabs design is appropriate for most floor situations and is also suitable for irregular column layouts, curved floor shapes, ramps etc. Reinforced concrete slab design using the empirical method bridgesight solutions for the aashto lrfd bridge design specifications bridgesight software tm creators of effective and reliable solutions for the worlds bridge engineers. Design considerations for reinforced concrete flat slab floor system harshal deshpande1, radhika joshi2. Design considerations for reinforced concrete flat slab floor. Performance of shear reinforcement against punching. Seismic analysis of flat slab by using etabs ijitee. Flat slabs may have drop panels at columns and columns may have capitals. This assumes that the slab thickness has previously been determined during conceptual design. Design of shear reinforcement against punching the institution of. Salunke mgms college of engineering and technology, kamothe, india mgms college of engineering and technology, kamothe, india abstract the use of posttensioned flat slab is increasing day by day, due to its advantages over traditional concrete.

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. Nov 02, 2017 civilax is the knowledge base covering all disciplines in civil engineering. Flat slab, direct design method ddm, equivalent frame method efm, safe. Slab resting on walls or sufficiently deep and rigid beams on all sides.

Simply supported one way slab a rectangular reinforced concrete slab is simplysupported on two masonry walls 250 mm thick and 3. This publication seeks to introduce fe methods, explain how concrete can be successfully modelled and how to interpret the results. Concept designs prepared assuming detailed design would be to bs 8110 may be continued through to detailed design using eurocode 2. Flat plate concrete floor system does not use beams between columns or. 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 beams reduce the available net clear ceiling height. A potential diagonal crack extends in a plane across the entire width l2 of the slab. A procedure for carrying out the detailed design of flat slabs is shown in table 1 below. Bridge approach slab analysis and design incorporating elastic soil support presented by. Nowadays flat slabs are used in most of the building because of its advantages.

Robustness and vulnerability of flat slab structures sciencedirect. 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. Finite element fe analysis, is a popular powerful computer method of analysing flat slab concrete structures. Twoway flat slab concrete floor with drop panels system analysis and design design the concrete floor slab system shown below for an intermediate floor considering partition weight 20 psf, and unfactored live load 60 psf. Pdf flat slabs are highly versatile elements widely used in construction, providing minimum depth. 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. Flat slab analysis and design designs beamless concrete slab floors flat slab or waffle slab in accordance with aci 318. Analysis and design of slabs two way two way edge supported slabs twoway slabs.

Advantages and disadvantages of flat slabs advantages and disadvantages of flat slabs a flat slab is a oneway or twoway system with thickenings in the slab at the columns and load bearing walls called drop panels figure 9. Punching strength of flat slabs with and without shear. The slab has to carry a distributed permanent action of 1. Analyze and design flat slab or waffle slab floors. The results of the study show that the slab can be successfully used for residential buildings as it meets all the requirements and demands fewer materials. Bending will take place in the two directions in a dishlike fo. Design of flat slab with drop in safe 2016 part duration. In this example, the calculating value of the effective depth d v is equal to the effective depth d minus the concrete cover c on the bottom surface of the slab. Design of slab examples and tutorials by sharifah maszura syed mohsin example 1. Sachpazis date 18012014 chkd by date appd by 1 flat slab design to bs8110.

This educational solved example for the design of reinforced concrete flat slab with drop panel, and check for punching shear. Many obstacles had to be translated until the flat slabs could be used safely and economically. Fundamentals of the model creation process are identified and various model construction techniques are introduced. The floor system consists of six panels in each direction. Oneway and twoway slabs oneway slabs transfer the imposed loads in one direction only. Analysis and design of flat slab by aci code with matlab coding. Safe offers a variety of templates for quickly starting a new model including flat slabs, twoway slabs, basemats, waffle slabs, ribbed slabs, and single or combined footings. Excel worksheets for analysis and design of flat slab using equivalent. Department of mechanics, materials and structures english.

Design the typical interior panel of a flat slab floor of size 5 m. Ms excel is done to design both types of flat slabs. The benefits of using insitu concrete flat slab construction should be investigated at the conceptual design. Different types of shear reinforcement used at column.

Flat slab analysis and design free version download for pc. Flat slab design in csi safe civil engineering community. 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. Slab punching design models are presented according to eurocode 2, aci code. Oneway simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. 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. Design strips can be generated by safe or drawn in a completely arbitrary manner by the user, with complete control provided for locating and sizing the calculated reinforcement. Project is also aimed to prepare the excel worksheet for analysis and design of the flat slab with staggered column by equivalent frame method. This presentation will show the steps necessary to model and design a slab using safe v12, based on aci 31808. Bending will take place in the two directions in a dishlike form. Rectangular and circular columns, and also columns with any general shape. The slab is assumed to be flat and horizontal and is located in the xy plane of the. Design of beam and slab sections for flexure, shear and torsion.

Pdf recommendations for reducing progressive collapse. The main objective of the paper is to study method of analysis and design of flat slab by using aci 318 08 design codes, with matlab programming for the easy application language for the design of flat slab. The idea is to reach a definite conclusion regarding the superiority of the two techniques over one another. The benefits associated with flat slab construction may well outweigh those of other structural solutions, which could be more complicated, timeconsuming and ultimately more costly.

Flat slab analysis and design pdf flat slab design pdf 1. Thus, the design of flat slabs to the punching is normally done using. They may be supported on two opposite sides only fig. The objective of this paper is to present analysis and design of rc flat slab using two different methods and. For 1m slab width, moment, shear force, oneway continuous slab for continuous slab, moment and shear force can be obtained from table 3. Manual for the design of reinforced concrete building. These materials are originally located at different websites. The lateral loads are independently resisted by shear walls. A preliminary blast design procedure, using test results and analysis methods, was developed in 1981 by ncel for safe and efficient flat slab structures ref 6. Guide to the design and construction of reinforced concrete. How to design reinforced concrete flat slabs using finite. Design by the direct design method a typical interior flat slab with drop panels to carry a dead load of 7.

Slabs may be simply supported or continuous over one or more supports and are classified according to the method of support. Two types of shear may be critical in the design of the flat slabs. In the uk, design methods for flat slabs and for checking punching shear capacity have. Reinforced concrete slab design using the empirical method. Flat slab types of flat slab design and its advantages. Civilax is the knowledge base covering all disciplines in civil engineering. The direct and the indirect risk can be determined using eq.

Programming in ms excel is done to design both types of flat slabs. Analysis of flat sanalysis of flat sllabab design for bending edge panels apportionment of moment exactly the same as internal columns max. Master of science and hereby certify that, in their opinion, it is worthy of acceptance. Pdf flat slab structural systems are amongst the oldest methods to.