The designs were analysed using adapt builder software with. Powered by a sophisticated fem solver increasing capacity and substantially speeding up solution for large and complex models, spmats v8. Grade the lot for positive drainage away from the foundation during and afterconstruction. Most geotechnical reports require a minimum embedment of 12 to 18 inches below the lowest adjacent grade. Structural analysis and design software for concrete buildings, floor systems. Design floors and foundations reliably and efficiently, saving time and money, and overcoming the most common concerns you face as a designer. Reinforced and posttensioned concrete slab design software. The pti design procedure is used to design a slabon grade foundation that will respond elastically to forces the foundation is exposed to including those that are the consequence of soil pressure and soil deformation. Design comparisons and examples will be presented to demonstrate these concepts and the application of the pti design method.
Posttensioning institute education pt applications. Over tensioning, bad prepration design layingcuring of concrete, bad structural design, bad load estimation and temperature, right. From figure 7 and 8 it is clear that the quantity and cost of steel. First model a flat slab for the entire area, then model the drop panels as separate slabs from the bottom of the flat slab. Now assuming all these are taken care of, no cracks should be there. Ram concept can predict the elastic behavior of a slab much more accurately than frame models. Posttensioning cant be used in belowgrade applications. Posttensioned concrete slabs augi the worlds largest. It offers a 3d finite element modeling approach for slabs. Grdslab concrete slab on grade analysis spreadsheet. Less concrete and steel are needed for the same structural capacity and the slab stiffness is increased so that the slab is better able to resist bending caused by differential soil movements.
The program provides for the ultimate strength and service stress design and analysis of oneway beam and slab and twoway flat plate systems. Inducta software now includes the latest version of australian standards for design of concrete structures. Adaptsog produces effective, accurate designs with confidence. At each end a pt anchor is located and these are located in pockets embedded into the slab edge. Grdslab is a spreadsheet program written in msexcel for the purpose of analysis of concrete slabs on grade.
Advantages of using posttensioning for your next slabonground project. The seminar will heavily emphasize design practice and will present recommendations for optimizing pt slab designs. Pti design method based on ribbed foundation system. Posttension basics how posttensioned slabs are built. Posttensioning concrete increases the many benefits associated with a concrete framed building. Ptislab can be used to design or analyze both posttensioned and conventionally reinforced slabsonground for single and multifamily residential. Longer spans can be achieved due to prestress, which can also be used to counteract deflections. Ptislab can be used to design or analyze both posttensioned and conventionally reinforced slabsonground for single and multifamily residential and commercial foundations on expansive and. Post tension slab design software post tension slab design software mck26 structural op 18 aug 16 14. We specialize in analysis and design software for precastprestressed concrete in both the transportation and commercial markets. Concrete slab on grade analysis calculator for post or.
Other design approaches for posttension slabongrade foundations rely on. Download free demo updated february 18, 2019 soilstructure mat or raft foundation simplifies the calculation of combined footings and mats or rafts. Adaptsog software for the design of posttensioned slabs on grade foundations on expansive and compressible soils. Slab design concrete slab design posttensioned concrete slab design pt slab slab. 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. Threedimensional 3d finite element software for analysis and design of. Its more user friendly compared to other pt design softwares.
In addition, the finite element method guarantees that the analysis satisfies all equilibrium. Calculation and the theory by which the software works are attached with this softwares index, this thing is not seen. Post tension slab design software structural engineering. Or differential shrinkage due to the presence of metal decking on one face of the slab. The sectiondesigns are carried out internally by software.
Posttensioned concrete has been used in building construction since the late 1950s. Posttensioning will reduce cracking and keep any cracks that might. Punching shear calculations are carried as per code provisions of is. Access to the separate program used to analysis posttensioning losses including friction and wedge set used in conjunction with the spreadsheet program can be made possible by contacting the author of this course.
Posttensioning institute education education programs. The slabsmith basic bundle is the most common initial software purchase for a fabricator. Maharashtra professional tax slab rate, latest news. However, because the continuous twoway tendons had to be placed in a draped parabolic profile near the top of. What is the best software to design a post tension slab. Calculation and analysis of uniform thickness slabs, sometimes. On the expansion side, the soil subgrade modulus is 100 kcf because the contractor could not match the soil properties under the existing foundation slab, which is 200 kcf. Adapt corporation specializes in structural concrete design software for posttensioning, reinforced concrete, and prestressed beam, slab, foundation, building and bridge structures using finite element or equivalent frame analysis. The professional tax slab rates are revised every fiscal year and can be paid online by nonsalaried persons. Salaried, selfemployed individuals, and companies in maharashtra are levied with professional taxes on their income from several sources. To model and design posttensioned slabongrade projects on expansive soils, use adaptsog. Ptsoftware seminars design wall hoops pttank evaluates the tendons hoops losses, and determines the number of tendons required, to balance the applied loads.
Posttensioning institute education pt applications slabon. Adaptpt is the industry standard standalone program for the design of beam frames, slabs and floor systems posttensioned with either bonded, or unbonded tendons. The purpose of this publication is to widen the understanding of posttensioned floor construction and show the considerable benefits which include minimum storey heights, rapid construction, economy, maximum design flexibility, minimum number of columns, optimum clear spans, jointfree, crackfree. Design and analysis of slabonground foundations on both expansive and compressible soils. Posttensioning institutes design of posttensioned slabsonground, pti design procedure 3rd edition. Posttensioned slabongrade foundation 3d fem design software adaptsog product overview adaptsog is a complete threedimensional 3d finite element fem analysis and design tool for the analysis and design of posttensioned foundations slabs on expansive soils. Construction maintenance of post tensioned slab on ground. Cables are arranged as indicated by the engineer and chaired to run through the center of the slab. Auto tendons for preliminary design perform a quick and accurate preliminary design check considering tendons. Rapt is a two dimensional post tension beamslab design software. A wall load, a column or point load and a uniform pressure. Download free, highquality cad drawings, blocks and details of posttensioned concrete organized by masterformat.
The pti design procedure is used to design a slabon grade. Per the soils engineer we also need to use a slabongrade posttensioned slab. Eriksson software precastprestressed concrete design. Originally posttensioned, twoway slab framing systems were constructed with column and middle strips, similar to those used in conventionally reinforced twoway slabs. This depth activates the appropriate bearing pressure and provides a partial water stop to minimize moisture intrusion under the foundation. Economically design posttensioned and reinforced concrete floors including slabs, mats, and rafts, with exceptional visibility. Pt slab design software slab on grade pt slab design software slab on grade kb2016 structural op 17 aug 16 14.
Posttensioned concrete design spreadsheet program a pdh. Its difficult to core holes or cut future openings in posttensioned slabs. Rapt is a two dimensional post tension beam slab design software. Slabongrade and posttensioned slab software adaptsog. Calculation and the theory by which the software works are attached with this softwares index, this thing is not seen on other softwares. Posttensioned pt slabs are typically flat slabs, band beam and slabs or ribbed slabs. Pt slabs offer the thinnest slab type, as concrete is worked to its strengths, mostly being kept in compression. Whats the solution of cracks in the post tensioning slab. Slabonground posttensioned slabsonground provide a costefficient, highperformance solution for problems associated with groundsupported residential foundations on shrinkswell soils.
Specifically, a concrete slab on grade may be subjected to concentrated post or wheel loading. I have a client that is trying to maximize their builditgreen points by using high flyash in the concrete mix. The compressive stresses resist the anticipated tension stresses induced by the soil movements, enhancing the performance over a nonprestressed foundation. Csis safe software is used in the design of an 87story mixeduse tower in chicago. Safe is the ultimate tool for structural engineers designing concrete floor slabs. Soilstructure slab on grade software simplifies the calculation of a uniform concrete slab subjected to three loads. Eriksson software is an engineering software development firm located in tampa, florida. This course provides the documentation to enable the use of a posttension design spreadsheet program for oneway concrete beam and slab and twoway concrete slab systems. Calculators for structural engineers, construction professionals and steel building specifiers. Construction of posttensioned slabs on grade is very similar to using reinforcing steel, except for the tensioning step. Pttank, analyses and designs the tank slab as a prestressed slabongrade to carry all tank generated actions the slab design reflects the type of footing. Vci calculated d from top of slab at interior support. I australia, for rc members, the extra cracking will be at the bottom at midspan for.
Ram concept enables the engineer to design posttensioned and reinforced concrete slabs by using a finite element model of the entire slab. The present study focuses on posttensioned flat slab systems with respect to strength, service and cost estimation. For most large pt slabs, we also have to model the drop panels at the column supports. The footings are typically located under bearing or. In pt slabs, it causes significant increase in deflections. Concrete slab design software economically design posttensioned and reinforced concrete floors including slabs, mats, and rafts, with exceptional visibility into compliance, efficiency, and practicality. Posttensioned, reinforced concrete slab design software ram. Online concrete slab on grade analysis calculator for slab subjected to interior concentrated post or wheel loading assuming slab is reinforced for shrinkage and temperature only. Posttensioned slabsonground provide a costefficient, highperformance solution for problems associated with groundsupported residential foundations on. Site preparation grade the lot for positive drainage away from the foundation during and afterconstruction. It includes all the features required to create digital slabs slab maker module, to layout your templates on your digital slabs perfect match module and to manage your slab and remnant inventory slab manager, job manager modules as well as the admin module for customizing the way slabsmith. Ptislab can be used to design or analyze both posttensioned and conventionally reinforced slabsonground for single and multifamily residential and.
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