Flat plate voided concrete slabs, reinforced concrete floor systems, twoway slabs, voided slabs. The design shear force v d is below the maximum punching strength v rd,max. Modeling and bending design of pointsupported flat slab dlubal. The example is 2 flat slabs supported by a rc beam. When i model slabs or shell elements using fem software. For 1m slab width, moment, shear force, oneway continuous slab for continuous slab, moment and shear force can be obtained from table 3. Consider all major aspects of slab design, including service, ductility, and strength limit states, punching shear requirements, longterm deflections, and walking vibration. The rest of the floor can be slightly thinner with less dead weight. A civil engineer must know all the aspects regarding the flat floor system. Two way rcc slab designing excel sheet civil engineering. Calculate aspect ratio aspect ratio 2 longer spanshorter span 2. 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. Twoway flat plate slab poured back in middle of december is just now showing cracks in last 23 weeks according to gc.
Twoway flat plate concrete floor system design structurepoint. Before you start, you must be familiar with your operating system. Design of rcc flat slab structure under earthquake loading. Csi etabs 2016flat slab design, strip design and punching. Works with any linearelastic material, metal, concrete, or whatever you need to bend. Cracks in flat plate slab structural engineering general. Design elevated concrete slabs with or without posttensioning. Threedimensional 3d finite element software for analysis and design of concrete and posttensioned floor and foundation systems. This system is similar to the twoway flat plate system except there is a drop panel to provide extra thickness around the columns.
Concrete flat slab design, free concrete flat slab design software downloads. The test specimens were characterized as falling into two groups according to the. A flat plate solution using conventional practices would need to be at least 14 inches thick, with very high quantities of posttensioning and reinforcement. 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. Here, we have tried to gather various reading materials available in the web about flat slab floor system in one place. 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. Flat slab analysis, design and detailing pdf civil. I went to risas website and also found no research on the topic. 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. 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. A flat slab is usually a pointsupported joistfree plate. Flat slab system is an important division of concrete floor system.
Design of flat slab structures advance design graitec. As point supports of the flat slab, columns are used. With a program dedicated to these tasks, your job is made easier. Two way slab design to aci free download and software. It can be used by both practicing engineers and students. The four corners of the slab panel are supported, e. Design softwares slab and beam design software service. 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. A flat plate floor can be constructed with an economical span of 6 to 8m for ordinary reinforced flat plate floor. It is one of the most common forms of construction of floors in buildings. Firstly, one has to check if the design shear force v d is smaller than the maximum punching strength v rd,max.
Steps for slab designing by direct design method ddm flat plate slab interior panel, exterior panel. 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. The strip may have up to 20 spans and may have cantilevers at the ends. Flat slab analysis and design designs beamless concrete slab floors flat slab or waffle slab in accordance with aci 318. Modelling a flatslab structure using fem software is simple at first glance. 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 slab design on software civildigital civil engineering articles concrete flat slab floors for construction efficiency advantages to client flat slab design on software 0. Calculation of approximate depth from deflection criteria cl 23. 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.
Concrete finite element procedure explicit rebar vs. However im once again getting conflicting results with my bending moments from rsa and those of my hand calculations. 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. Hello, i am trying to compare the results from robot with hand calculations, and i cannot get the right results in robot. 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. Flat slabs supported in rc beam autodesk community.
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 flat slabs using shell finite element analysis. Analyses are for a onebaywide strip using the equivalent frame analysis method of the aci code. Nancy debora assistant professor civil karunya university 2. Two way punching shear concept explained and flat plate example csa a23. Our design software for flat plate foundation construction is a must have for any structural engineer.
Visualplate wall, slab or plate bending analysis and design. Combined footing analysis and design spmats software. Using aci 31814 minimum slab thickness for twoway construction without. Flat slabs are usued for their aesthetic appearance and. 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. Concrete flat slab design software handy concrete estimator v. Apr 18, 2019 this spreadsheet performs an analysis and design of twoway spanning reinforced concrete slab. Design the flat plate using section cut techniques in sap2000. Trusted windows pc download flat slab analysis and design 2. General overview of posttensioned concrete design instructor. To reduce the slab thickness to 11 inches and posttensioning quantities to levels commonly associated with 30foot residential spans. Flat slab design tekla structural designer user assistance. 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. Nodes of the fem model in connection with a column with a plate default mesh.
A total of seven largescale flat plate slabs 1,700 x 1,700 x 150 mm were constructed and loaded up to failure. Posttensioned concrete design spreadsheet program a pdh. Flat slab structure with column drop and shear wall together through response spectrum method by using etabs software. Flat slab analysis, design and detailing pdf civil engineering. Flat plate concrete floor system does not use beams between columns or drop.
Flat slab design with images autocad, architecture, slab. Flat slab is a reinforced concrete slab supported directly by concrete columns without the use of beams. A reinforced concrete slab supported directly by concrete columns without the use of beams 4. Visualplate wall, slab or plate bending analysis and. 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.
How to design flat plate slab in etabs tutorial detailing in autocad. Cover your bases with flat slab analysis design flat slab software. For prestressed construction, the economical span can be increased to 8 to 12m. To learn more about how our company can assist with your upcoming project, contact midstate filigree systems today. Flat plate slab design using section cut in sap2000 civil.
Flat plate concrete floor system does not use beams between. Analysis, design and investigation of beams, one and twoway slab systems, flat plate, flat slab, waffle slab and slab bands. Analyze and design flat slab or waffle slab floors. Posttensioned, reinforced concrete slab design software ram. The behavior of flat slab is investigated in terms of the following factors.
Flat plate concrete floor system does not use beams between columns or. Availability of this program was discontinued in 2008. How to address design particularities of flat slab structures using graitec advance. Flat slab analysis and design free version download for pc. These materials are originally located at different websites. 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 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. 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. The slab is loaded by self weight of the slab and live load of 5 knm2. Twoway flat plate concrete floor system analysis and design. Jul 28, 2014 the flat plate is a twoway reinforced concrete framing system utilizing a slab of uniform thickness, the simplest of structural shapes. The flat plate is a twoway reinforced concrete framing system utilizing a slab of uniform thickness, the simplest of structural shapes. Built on adapts unique truestructure modeling and analysis technology, this software provides a powerful, yet easy to use. If the load cases were defined by panel, the capacities of the program would be significantly exceeded. Two way slab design spreadsheet the engineering community. Solve plate bending problems for any geometry of flat plate, with various supports or holes. Example reinforced flat plate with the section cuts marked for column strips and middle strip. Powered by the equivalent frame method of analysis and design per latest american aci 31814 and canadian csa a23. Drop panels play a significant role here as they augment the. The program is divided into three separate screens, which correspond to the three major areas of concern in the design of a posttensioned member.
This spreadsheet program provides for the design and analysis of posttensioned concrete oneway beam and slab systems and twoway flat plate slab systems. A flat plate is a one or twoway system usually supported directly on columns or load bearing walls. This spreadsheet performs an analysis and design of twoway spanning reinforced concrete slab. Flat slab analysis design software for flat waffle slab. Flat plate slab design using section cut in sap2000. It is also possible to use wall surfaces as line supports. Strength investigation and strengthening of existing floor slabs. 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. 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. Safes ageadjusted modulus of elasticity method for flat plate slab analysis was found to be more accurate than other software when compared to. 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. Get flat slab analysis and design alternative downloads. 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.