The more conservativefail proof approach is to set engineered steel rebar inside the forms. The following table of prestress losses is recommended for the design of post tensioned members, and does not include friction or wedge set losses. For residential construction, tendons at 48 inches on center are common. What is the best software to design a post tension slab. In a posttensioned beam, the tendons are stressed and each end is anchored to the concrete section after the concrete has been cast and has. Post tensioning is a method of reinforcing strengthening concrete or other materials with highstrength steel strands or bars, typically referred to as tendons. Design floors and foundations reliably and efficiently, saving time and money, and overcoming the most common concerns you face as a designer. After creating a fully watertight solution, we directed our efforts on making the process faster, less expensive, and more ergonomic that traditional grouting.
Sep 18, 2006 post tensioned foundations use highstrength steel to actively reinforce residential foundations to minimize cracking and increase performance. Posttensioning and prestressed design and software expertise for. Not sure what is the source of the dot detail that vitopito post, but caltrans and florida dot are similar to that post above. Consider all major aspects of slab design including service, ductility, and strength limit states, codeprescribed requirements, longterm deflections, punching shear, and walking vibration. Nov 19, 2016 the alternative to pretensioning is post tensioning. Post tensioning chucks post tension accessories post tensioning strand post tensioning jacks post tensioning rams. The advantages of utilizing prestressed concrete and masonry have long been recognized by engineers. Conquest gpr maps posttension cable 3d visualization of location of underground utilities, rebar and posttension cables embedded in a concrete slab an expanding.
Software for posttensioned or prestressed structures. Since 1981, adaptpts proven reliability and easeofuse have made it the most widely used software for the design of posttensioned slabs and. Post tensioned foundation information for the homeowner. Posttensioned concrete design spreadsheet program a pdh. To meet the design requirements, a low value for posttensioning had to be specified, in order to induce cracking in the floor system. This is particularly true for post tension cable systems. Adapt corporation specializes in structural concrete design software for post tensioning, reinforced concrete, and prestressed beam, slab, foundation. Cables are arranged as indicated by the engineer and chaired to run through the center of the slab. In a post tensioned beam, the tendons are stressed and each end is anchored to the concrete section after the concrete has been cast and has. The program is divided into three separate screens, which correspond to the three major areas of concern in the design of a posttensioned. Posttensioned foundation a typical posttensioned foundation with the forms set and ready for concrete. When a designer wants to take advantage of those benefits, they must determine whether the structure is to be constructed using the pre tension method or the post tension. The example presented here is for twoway posttensioned design. Posttensioned, reinforced concrete slab design software ram.
Download free, highquality cad drawings, blocks and details of post tensioned concrete organized by masterformat. Calculation and the theory by which the software works are attached with this softwares index, this thing is not seen on other softwares. The following table of prestress losses is recommended for the design of post tensioned members, and does not include. How can one perform analysis of a cable stayed bridge. Aug 30, 2017 this spreadsheet program provides for the design and analysis of post tensioned concrete oneway beam and slab systems and twoway flat plate slab systems. Post tensioning, barrier cable, multi strand, mono strand, bonded post tension. Posttensioning and prestressed design and software expertise. Pti offers certification of plants producing unbonded single strand tendons. Rogers says they conducted over 2000 exams in 2007 and are ahead of that. Members of the institute include major post tensioning material fabricators in the u. In this article, ill be giving homeowners some necessary information about the characteristics, advantages, disadvantages, and common questionsconcerns that i.
Suncoast has a more depth and breadth of engineering talent than other posttension companies, with multiple professional engineers on staff, supported by a team of posttension technicians who work under licensed professional engineers using. Members of the institute include major posttensioning material fabricators in the u. Find a way to eliminate water intrusion at the stressing end. Unless otherwise noted, all referenced table, figure, and equation numbers are from these books. Design and software expertise in posttensioning and prestressed concrete for over 30 years, adapt corporation has provided a full range of software products and engineering services for the modeling, analysis and design of prestressed pre or posttensioned concrete structures. Calculation and the theory by which the software works are attached with this softwares index, this thing is not seen. Structural calculations for posttensioned beam and oneway slab construction. Posttension basics how posttensioned slabs are built the. Can robot or is there a that robot can analyze a post tensioned beam slab i have been thinking about about using cables and rods but not sure if this is the best way. Take a tour of cablecad computer aided design cad and finite element analysis fea software for cable, wire rope and flexible pipe. Prestress is an advanced software for calculations of prestressed concrete elements.
Experienced specialty contractors and engineers have the knowhow to develop and execute repairs of unbonded posttensioning tendons, make modifications to existing unbonded posttensioned structures. Posttensioned foundations use highstrength steel to actively reinforce residential foundations to minimize cracking and increase performance. The horizontal supports and midspan cable forces can be. Sep 09, 2016 course study on post tension slab design. Posttensioning chucks posttension accessories posttensioning strand posttensioning jacks posttensioning rams. Post tension cable repair installation multi strand miami. The use of post tension cable systems has become increasingly popular for meeting many design needs. The program enables the user to define and design post tensioned concrete beams and slabs for any strap model. I have 17 years experience in industrial design, my expertise are more. For high effecient structural systems that offer construction repair, installation. Typically maximum fiber stress in tension controls design. Our future vision pti envisions a future in which post tensioning is the first choice for reinforcing all structures.
A post tensioned splice was developed that eliminates the tensilestress limitations during driving. Providing a single environment for curved steelgirder, cable stayed and post tension concrete bridge design and construction, larsa 4d provides process efficiency and quality, saving time and delivering value to our clients. Suncoast has a more depth and breadth of engineering talent than other post tension companies, with multiple professional engineers on staff, supported by a team of post tension technicians who work under licensed professional engineers using stateofthe art engineering and cad software. Post tension cables are steel wires inserted into plastic sheathing laid in place while pouring the concrete slab. Posttensioning is a method of reinforcing strengthening concrete or other materials with highstrength steel strands or bars, typically referred to as tendons. General overview of posttensioned concrete design instructor. Hello friends of robot, its been a while i have a question regarding a function in robot. If playback doesnt begin shortly, try restarting your. Cablecad cable design and analysis software features. Jul 21, 2017 rapt is a two dimensional post tension beamslab design software. Fully encapsulated post tension systems the saying goes that a chain is only as strong as its weakest link. Rapt is a two dimensional post tension beamslab design software. Want to design concrete floors economically, with exceptional visibility into compliance, and efficiency while designing slabs, mats, and rafts. The program is divided into three separate screens, which correspond to the three major areas of concern in the design of a posttensioned member.
Developed by jim rogers at evaluation and certification services publishers of post tension magazine, this program offers two programs, to certify installers of single strand unbonded post tensioning installers and bonded post tensioning installers. A cable with length 100 ft and a sag 30 ft has a uniform load 850 lbft. 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. Construction of posttensioned slabs on grade is very similar to using reinforcing steel, except for the tensioning step. Developed by jim rogers at evaluation and certification services publishers of post tension magazine, this program offers two programs, to certify installers of single strand unbonded posttensioning installers and bonded posttensioning installers. This video shows one of the major features in femdesign 17, which is the post tension cable. The alternative to pretensioning is posttensioning. Post tensioning tendon profile autocad lisp algorithm. Indications are given concerning preliminary design and indirect control of deflections in posttensioned flat slabs. The unique design improves the speed of removing the pocket former from the slab and increases the re. Equivalent frame structural concrete design software 2d design. Most residential foundations in the united states are constructed with rebar or wire mesh as their reinforcement to minimize shrinkage cracks and to resist the stresses created by the. This is the first of three papers that details the development of this alternative approach, including the conceptual basis for the design and its implementation into a prototype system.
Post tensioning cable slope concrete engineering general. Whether you are doing a residential or commercial project, we have everything you need to get the job done. It is a shame that auto desk after all these years of revit has still failed to include the ability to install post tension in the models as easily as we would install rebar. Adapt corporation specializes in structural concrete design software for post tensioning, reinforced concrete, and prestressed beam, slab, foundation, building and bridge structures using finite element or equivalent frame analysis. What are the types of cables pretension or post tension.
Larsa 4d advanced software for the analysis and design of. The example presented here is for twoway post tensioned design. Post tension plugs was founded with one goal in mind. A posttensioned splice was developed that eliminates the tensilestress limitations during driving. Suncoast posttension is north americas largest unbonded posttension specialist. Posttension basics how posttensioned slabs are built. Top 10 biggest mistakes made in posttensioned concrete. We are dedicated to providing the construction industry with engineering expertise, responsive service and manufacturing excellence to ensure safe, timely and cost effective installations, restorations and repairs. Posttensioned splice system for precast, prestressed.
We provide posttensioning cables that are utilized in commercial. Photo album gallery place holder please wait while the photo album. Posttensioning and prestressed design and software. Recommendations for stay cable design, testing, and installation.
They are tensioned after pouring concrete, hence the name posttension cables. Post tensioning institute publishes update of cable stayed bridges publication. Framing dead load selfweight superrimposed dead load 25 psf partitions, me, misc. Design posttensioned and conventional systems design elevated concrete slabs with or without posttensioning. This spreadsheet program provides for the design and analysis of posttensioned concrete oneway beam and slab systems and twoway flat plate slab systems. Posttension cables are steel wires inserted into plastic sheathing laid in place while pouring the concrete slab. The user has full flexibility in defining the number of the cables and their shape. Structural calculations for posttensioned beam and oneway. Pti currently offers 5 training and certification workshops for field personnel. Larsa 4d advanced software for the analysis and design.
Economically design post tensioned and reinforced concrete floors including slabs, mats, and rafts, with exceptional visibility into compliance, efficiency, and practicality. Deflecuon limits prestressing in posttensioned slabs fundamentally influences the behaviour of the structure under service loads. See the overview and download the product brochure. Software for posttensioned or prestressed structures adaptbuilder structural concrete design suite 3d fem design adaptedge analyzes complete concrete buildings for gravity and lateral loads. We are not only using our knowhow for new construction projects, but also for the structural repair and strengthening of existing.
Posttension tendon is a term used to define the complete. Download free, highquality cad drawings, blocks and details of posttensioned concrete organized by masterformat. Six problems with posttensioning force specifications. Providing a single environment for curved steelgirder, cablestayed and posttension concrete bridge design and construction, larsa 4d provides process efficiency and quality, saving time and delivering value to our clients. Post tension cables are used in concrete construction to add strength to thin and long slabs. Design and software expertise in post tensioning and prestressed concrete for over 30 years, adapt corporation has provided a full range of software products and engineering services for the modeling, analysis and design of prestressed pre or post tensioned concrete structures. The software provides a step by step guide for the engineer from element geometry definitions, prestress strand optimization, eurocode design checks and documentation reports. Structural engineers design concrete slabs with posttension cables to obtain greater span lengths between supporting columns and to allow thinner slabs. Ptc inc post tensioning supplies engineering everett wa. The design uses the program adapt floor pro release 20092010 featuring the hong kong code. Prestressed concrete design in rfem dlubal software. This is the first of three papers that details the development of this alternative approach, including the conceptual basis for the design and its implementation into a. The program is divided into three separate screens, which correspond to the three major areas of concern in the design of a post tensioned member. Cumberland posttension, inc is your best source for all your posttension cables and related products.
Pticertified personnel involved in pt field operations are vital to ensuring the performance, serviceability, durability, and safety of pt concrete construction. Which is the best bridge design software for a beginner and which one is also best for advanced level. Here is caltrans detail from their 2015 bridge design practice, on pt girders. The unique design improves the speed of removing the pocket former from the slab and increases. The following example illustrates the design methods presented in aci 31805 and ibc 2003. Lisp we had read your project description and understood your requirement. Fully encapsulated post tension systems quality built. The stress in the tendon and the equivalent loads from prestress are calculated with regard to the tendon losses. This allows more span lengths between support columns.
When a designer wants to take advantage of those benefits, they must determine whether the structure is to be constructed using the pretension method or the posttension. Post tensioning the program enables the user to define and design posttensioned concrete beams and slabs for any strap model. Its more user friendly compared to other pt design softwares. Structural engineers design concrete slabs with post tension cables to obtain greater span lengths between supporting columns and to allow thinner slabs. Actual losses, whether greater or smaller than computed values, have little effect on the design strength of the member but do affect service load conditions i. Twoway posttensioned design amsysco post tensioning. Concrete slab design software economically design posttensioned and reinforced concrete floors including slabs, mats, and rafts, with exceptional visibility into compliance, efficiency, and practicality. Dywidag strand posttensioning systems, dywidag bar posttensioning systems and dyna grip stay cable systems offer durability, safety, quality and reliability and are tailored to suit your specific requirements.
1133 104 1473 1047 1424 1240 1155 428 1458 1287 717 182 1653 95 927 1104 936 1042 706 1505 1524 32 281 534 1385 129 285 1382