This system is similar to the twoway flat plate system except there is a drop panel to provide extra thickness around the columns. Flat slabs supported in rc beam autodesk community. Since the flat plate is symmetrical in two directions, one needs to define section cuts in one direction and for half the slab. Csi etabs 2016flat slab design, strip design and punching. If the load cases were defined by panel, the capacities of the program would be significantly exceeded. For prestressed construction, the economical span can be increased to 8 to 12m. Apr 18, 2019 this spreadsheet performs an analysis and design of twoway spanning reinforced concrete slab. Design of flat slabs using shell finite element analysis. Visualplate wall, slab or plate bending analysis and design. However im once again getting conflicting results with my bending moments from rsa and those of my hand calculations. Two way slab design spreadsheet the engineering community. 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 softwares slab and beam design software service. Flat slab is a reinforced concrete slab supported directly by concrete columns without the use of beams.
A civil engineer must know all the aspects regarding the flat floor system. Cover your bases with flat slab analysis design flat slab software. To learn more about how our company can assist with your upcoming project, contact midstate filigree systems today. Select rating give flat slab design 15 give flat slab design 25 give flat slab design 35 give flat slab design 45 give flat slab design 55 cancel rating. This spreadsheet performs an analysis and design of twoway spanning reinforced concrete slab. Flat slab structure with column drop and shear wall together through response spectrum method by using etabs software. Feb 22, 2018 civil engineering for construction informatics csi etabs 2016 flat slab design, strip design and punching shear check please have a look in this video thank subscribe our youtube channel to get.
Flat plate voided concrete slabs, reinforced concrete floor systems, twoway slabs, voided slabs. Analysis, design and investigation of beams, one and twoway slab systems, flat plate, flat slab, waffle slab and slab bands. Flat slab analysis and design free version download for pc. Flat plate concrete floor system does not use beams between columns or.
Works with any linearelastic material, metal, concrete, or whatever you need to bend. Availability of this program was discontinued in 2008. Visualplate wall, slab or plate bending analysis and. Since the flat plate is symmetrical in two directions, one needs to define section cuts in one direction and for half the slab figure 1. Using the information from this thread two way flat plate slab moments, critical moments and punching shear, i tried to apply what ive learned to my building project.
Solve plate bending problems for any geometry of flat plate, with various supports or holes. Modelling a flatslab structure using fem software is simple at first glance. Oneway simply supported slab analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. Cracks in flat plate slab structural engineering general. The design shear force v d is below the maximum punching strength v rd,max.
To reduce the slab thickness to 11 inches and posttensioning quantities to levels commonly associated with 30foot residential spans. Flat slab design on software civildigital civil engineering articles concrete flat slab floors for construction efficiency advantages to client flat slab design on software 0. The flat plate is a twoway reinforced concrete framing system utilizing a slab of uniform thickness, the simplest of structural shapes. For 1m slab width, moment, shear force, oneway continuous slab for continuous slab, moment and shear force can be obtained from table 3. Flat slab analysis and design designs beamless concrete slab floors flat slab or waffle slab in accordance with aci 318. Analyses are for a onebaywide strip using the equivalent frame analysis method of the aci code. Before you start, you must be familiar with your operating system. Nodes of the fem model in connection with a column with a plate default mesh. Hello, i am trying to compare the results from robot with hand calculations, and i cannot get the right results in robot. How to address design particularities of flat slab structures using graitec advance.
General overview of posttensioned concrete design instructor. With a program dedicated to these tasks, your job is made easier. It is also possible to use wall surfaces as line supports. Course no416 prestressed concrete lab presented by md. Two way slab design to aci free download and software. A reinforced concrete slab supported directly by concrete columns without the use of beams 4. Flat plate concrete floor system does not use beams between. Posttensioned concrete design spreadsheet program a pdh. The test specimens were characterized as falling into two groups according to the.
Safes ageadjusted modulus of elasticity method for flat plate slab analysis was found to be more accurate than other software when compared to. 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. Get flat slab analysis and design alternative downloads. Flat slab design tekla structural designer user assistance. Flat slab design with images autocad, architecture, slab. Design the flat plate using section cut techniques in sap2000. 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 design software for flat waffle slab. Flat slab are slab which dont have beams or continuous t beams bw them as ribs to increase the rigiditymeanwhile one with beams is called grid slab one which you usually see these days.
Flat slab system is an important division of concrete floor system. I went to risas website and also found no research on the topic. Firstly, one has to check if the design shear force v d is smaller than the maximum punching strength v rd,max. Flat slab, shear wall, linear dynamic analysis, base shear, time period, story drift, storey displacement 1 introduction from last two decades there is a high increase in the high rise buildings and modern trend is towards high rise. This spreadsheet program provides for the design and analysis of posttensioned concrete oneway beam and slab systems and twoway flat plate slab systems. Drop panels play a significant role here as they augment the. Trusted windows pc download flat slab analysis and design 2. Flat slab analysis, design and detailing pdf civil engineering. How can i design a reinforced concrete flat plate in sap2000.
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. A flat plate solution using conventional practices would need to be at least 14 inches thick, with very high quantities of posttensioning and reinforcement. Concrete flat slab design software handy concrete estimator v. Combined footing analysis and design spmats software.
The slab is loaded by self weight of the slab and live load of 5 knm2. Consider all major aspects of slab design, including service, ductility, and strength limit states, punching shear requirements, longterm deflections, and walking vibration. Our design software for flat plate foundation construction is a must have for any structural engineer. Concrete finite element procedure explicit rebar vs. The example is 2 flat slabs supported by a rc beam. Built on adapts unique truestructure modeling and analysis technology, this software provides a powerful, yet easy to use. A total of seven largescale flat plate slabs 1,700 x 1,700 x 150 mm were constructed and loaded up to failure. Steps for slab designing by direct design method ddm flat plate slab interior panel, exterior panel. Flat plate slab design using section cut in sap2000. Jul 28, 2014 the flat plate is a twoway reinforced concrete framing system utilizing a slab of uniform thickness, the simplest of structural shapes. Voided concrete flat plate slab systems, which have been used for many years in europe and other parts of the world, are becoming increasingly popular in the u. Two way rcc slab designing tool in microsoft excel developed by shankar tayal a 3rd year student of school of infrastructure, indian institute of technology, bhubaneswar this is a part of his project economic design of two way rcc slabs under prof s.
Example reinforced flat plate with the section cuts marked for column strips and middle strip. Design of rcc flat slab structure under earthquake loading. Calculate aspect ratio aspect ratio 2 longer spanshorter span 2. The four corners of the slab panel are supported, e. Washroom design bathroom design layout modern bathroom design bathroom interior design bathroom design software interior design software bathroom plans master bathroom wc public autocad drawing for architecture design classic and modern cad blocks, free download in dwg file formats for use with autocad and other 2d design software without login. Strength investigation and strengthening of existing floor slabs. It is one of the most common forms of construction of floors in buildings. 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 1 knm2, and unfactored live load 1. How to design flat plate slab in etabs tutorial detailing in autocad. This technical note contains a collection of typical questions, which mainly came from design professionals, including structural engineers, architects, field inspectors, code enforcement officials, and contractors. To reduce the slab thickness to 11 inches and posttensioning quantities to levels commonly associated with 30foot residential spans, a cambered solution was proposed in tandem with the. Flat slabs are usued for their aesthetic appearance and. Nancy debora assistant professor civil karunya university 2. Safes ageadjusted modulus of elasticity method for flat plate slab analysis was found to be more accurate than other software when compared to actual deflections.
Analyze and design flat slab or waffle slab floors. The rest of the floor can be slightly thinner with less dead weight. A flat slab is usually a pointsupported joistfree plate. Twoway flat plate slab poured back in middle of december is just now showing cracks in last 23 weeks according to gc. Flat slab analysis, design and detailing pdf civil.
Using aci 31814 minimum slab thickness for twoway construction without. Modeling and bending design of pointsupported flat slab dlubal. Flat slabs may have drop panels at columns and columns may have capitals. Calculation of approximate depth from deflection criteria cl 23. Posttensioned, reinforced concrete slab design software ram. These materials are originally located at different websites.
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. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. A flat plate is a one or twoway system usually supported directly on columns or load bearing walls. Design of flat slab structures advance design graitec. Keep the code using the aci code for equivalent frame analysis the flat slab analysis design software for waffle slab floors and flat slab floors the user has to put in a few geometrical figures and loads and the program does the rest. The behavior of flat slab is investigated in terms of the following factors. Twoway flat plate concrete floor system analysis and design. This spreadsheet is an extremely efficient tool and allows to quickly design two way slabs to aci code. 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. Flat plate slab design using section cut in sap2000 civil. As point supports of the flat slab, columns are used. The strip may have up to 20 spans and may have cantilevers at the ends.
Flat slab types of flat slab design and its advantages. Twoway flat plate concrete floor system design structurepoint. Structure magazine flat plate concrete construction. A flat plate floor can be constructed with an economical span of 6 to 8m for ordinary reinforced flat plate floor. Design elevated concrete slabs with or without posttensioning. Two way punching shear concept explained and flat plate example csa a23. It can be used by both practicing engineers and students. The program is divided into three separate screens, which correspond to the three major areas of concern in the design of a posttensioned member. Threedimensional 3d finite element software for analysis and design of concrete and posttensioned floor and foundation systems. Flat plate concrete floor system does not use beams between columns or drop. Two way rcc slab designing excel sheet civil engineering. Midstate filigree also offers flat plate systems ideal for hotels, apartments, and condos as well as steel systems designed to be compatible with steel framing construction projects.
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