Pretensioning and posttensioning in prestressed concrete. Post tensioning of foundations, transfer beams and plates, post tensioned masonry and the combination of precast elements with castinplace concrete by means of post tensioning offer other interesting opportunities. Consider all major aspects of slab design including service, ductility, and strength limit states, codeprescribed requirements, longterm deflections, punching shear, and walking vibration. The focus of adapts work in building design is concrete structures, in particular, posttensioned buildings, parking structures, ground supported slabs, and various floor systems. Post tensioning is a method of reinforcing strengthening concrete or other materials with highstrength steel strands or bars, typically referred to as tendons. Post tensioning is the primary method of prestressing, where the tendons are stressed after the masonry has been placed. The program enables the user to define and design post tensioned concrete beams and slabs for any strap model the user has full flexibility in. Economically design posttensioned and reinforced concrete floors including slabs, mats, and rafts, with exceptional visibility. In post tensioned construction, hollow concrete masonry units are laid conventionally and prestressing tendons are either placed in the concrete masonry cells or in the cavity between multiple wythes. Posttensioning institute education pt applications. Precast posttensioned segmental construction is defined as a method of construction for bridges, buildings, tanks, silos, cooling towers, tunnels and other structures in which primary load carrying members are composed of precast concrete segments post tensioned together.
Free online education presentations on post tensioning videos openair blast testing of large prestressed concrete slabs. Calculation and the theory by which the software works are attached with this software s index, this thing is not seen. Post tensioning in buildings is not limited to floor slabs. Top 10 biggest mistakes made in posttensioned concrete. 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. Pt designer is a windowsbased computer program for the design and analysis of linear post tensioned concrete frames. With fewer pieces to handle and less concrete to place, a post tensioned slab can often be installed more quickly than a comparable rebar or wire meshreinforced slab. Pre tensioning and posttensioning in prestressed concrete design pre tensioning in prestressed concrete. The program provides for the ultimate strength and service stress design and analysis of oneway beam and slab and twoway flat plate systems. Post tension slab design software structural engineering. Impact of deterioration of post tensioned tendons in bridges. Reinforced concrete and partially prestressed concrete members to various design codes. Most precast, prestressed concrete is actually pre tensioned the steel is pulled before the concrete is poured.
Posttensioned concrete is typically specified having an early age strength requirement. Concrete slab design software economically design post tensioned and reinforced concrete floors including slabs, mats, and rafts, with exceptional visibility into compliance, efficiency, and practicality. The design of general anchorage zones is critical to the integrity of any posttensioned concrete structure and we recommend that the ldp complete this task personally. Pt designer, our latest post tensioned design software for more. The program enables the user to define and design posttensioned concrete beams and slabs for any strap model. Eriksson software is an engineering software development firm located in tampa, florida. Seismic retrofit using externally applied posttensioning tendons.
Post tensioning concrete increases the many benefits associated with a concrete framed building. Posttensioned, reinforced concrete slab design software ram. A 2 2area 2 a c 2 2 post tensioned concrete design table 11 list of symbols used in the aci 31808 code cp area enclosed by the outside perimeter of the section, in a g gross area of concrete, in a 2 l total area of longitudinal reinforcement to resist torsion, in a o area enclosed by the shear flow path, sqin a oh area enclosed by the centerline of the outermost closed. 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. Net, which many engineers have come to trust over the years for its accuracy and flexibility. The program is developed around the robust computational core of two popular programs ptdata. Effective inspection and monitoring of posttensioned. This course provides the user with a fundamental understanding of posttensioned concrete design to enable the use of a spreadsheet program. Generally, a compressive strength of 22 mpa is required before stressing can be completed. Ram concept is a software application for the structural analysis and design of conventionally reinforced and post tensioned concrete floors, mats, and rafts. Any software that uses long term multipliers like 2 with a compression reinforcement factor is effectively useless for rc design and does not apply at all for. For the repair and modification of post tensioning pt systems as well as post tensioned concrete structure repair and protection, structural technologies offers highly specialized products and services including investigation, repair design support, repair and replacement components, corrosion protection products, strengthening solutions as well as new or replacement post tensioning systems.
Post tensioned concrete is widely used in bridges, shell structures, water tanks, and. The scope of the work covers the gravity and seismic design of new structures and the retrofitting of existing buildings. The forces contained within post tensioning tendons demand that owners, designers and contractors who maintain these structures have a high level of technical knowledge and skills to ensure the safety of the structure and of individuals working on, near or in the vicinity of a post. Prestressing post tensioned concrete software design. For an excellent overview of pt, visit the post tensioning. Posttensioned concrete means that the concrete is poured and then the tension is appliedbut it is still stressed before the loads are applied so it is still prestressed. Post tensioning pt is one of the most advanced and efficient technologies used to reinforce concrete. Post tensioning 61 component enables tekla structures to accurately model most post tensioning profiles and attributes. This course provides the documentation to enable the use of a posttension design spreadsheet program for oneway concrete beam and slab and twoway. Equivalent frame structural concrete design software 2d design. Once you finish studying the above course content, you need to take a quiz to obtain the pdh credits. Post tensioning chucks post tension accessories post tensioning strand post tensioning jacks post tensioning. Pt designer is a computer program for the design and analysis of linear post tensioned concrete floor systems.
Rapt is a two dimensional post tension beamslab design software. Posten engineering systems structural engineering is. Top 10 biggest mistakes made in posttensioned concrete design. Download free, highquality cad drawings, blocks and details of post tensioned concrete organized by masterformat. Use the tabs in the component dialog box to load a previously saved pt post tensioning tendon reinforcement that represents reinforcing bars, strands, or wires that are used to produce a compressive stress in prestressed concrete besides the actual reinforcing bars. Posttensioning and prestressed design and software expertise for. Adapt corporation specializes in structural concrete design software for post tensioning, reinforced concrete, and prestressed beam, slab, foundation. Developers, architects, engineers, contractors, educators and. Adapt software system post tensioned concrete for todays market seattle dailyjournal of commerce post tensioning institute post tensioned slabs concrete. Adaptpt designs posttensioned slabs and beam frames using equivalent frame method. The program enables the user to define and design post tensioned concrete beams and slabs for any strap model. Fundamentals of posttensioned concrete design for buildings. Posttensioning methods for reinforcing concrete the. Post tension slab design software post tension slab design software mck26 structural.
Post tension slab although concrete is a strong material for construction, it is not resistant to breakdown especially where longer concrete slabs are required like in a bridge or a length of a beam. Once the concrete has gained strength to 2000 psi, typically within the 3 to 10 days recommended by pti, the tendons are stressed. The advantages of posttensioned structures a technique that allows long beams lengths to be achieved reduces deflections and allows highspan depth ratios improves durability by the reduction or elimination of cracking more efficient utilization of steel and concrete material. Trimble announced a partnership with adapt, a provider of posttensioned and reinforced concrete software. This tek focuses on the design of concrete masonry walls constructed with vertical post tensioned tendons. Fundamentals of posttensioned concrete design for buildings part one. This new pt software workshop will allow structuralcivil engineers to design pt structures quickly whilst still understanding the processes involved via a more interactive input of data and output of results. The software is extremely easy to use and is intended for both occasional and regular designers of post tensioned concrete beams, oneway and twoway slabs, and mat foundations.
Prestressing post tensioned concrete software design workshop. Adapt corporation specializes in structural concrete design software for posttensioning, reinforced concrete, and prestressed beam, slab, foundation. Posttensioning and prestressed design and software. Net is a windowsbased computer program for the design and analysis of linear posttensioned concrete frames. Posten engineering systems provides the tools you need to design your structures efficiently, quickly and correctly. Our future vision pti envisions a future in which post tensioning is the first choice for reinforcing all structures. Post tension slab advantages and disadvantages of post.
Suncoast posttension is north americas largest unbonded post tension specialist. Design floors and foundations reliably and efficiently, saving time and money, and overcoming the most common concerns you face as a designer. The strength and added stiffness of a post tensioned foundation reduces the amount the slab will bend under load. And while code allows a licensed design professional ldp to delegate the design of the general anchorage zone to the contractor, we dont recommend taking that route. 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 post tensioned concrete structures. We specialize in analysis and design software for precastprestressed concrete in both the transportation and commercial markets.
Eriksson software precastprestressed concrete design. Whether you are doing a residential or commercial project, we have everything you need to get the job done. See the adjacent software information links for general details regarding lusas. What is the best software to design a post tension slab. A residential post tensioned concrete slab will typically be 8 inches thick and use 3000 psi concrete. Trimble partners with adapt to deliver a complete posttensioned. Pt designer is a computer program for the design and analysis of linear posttensioned concrete floor systems.
Our innovative approach and extensive experience dealing with concrete and steel strand tensioning systems allows us to provide our customers with excellent pt concrete engineering results. If you want the latest theory get gilbert and ranzis book on long term effects in concrete. Conventionally without post tensioning concrete would have to be poured very thick to handle loads, in addition, the size and length of concrete structures. Beam line, shell surface and solid volume modelling of concrete is supported. In this free webinar dirk bondy and bryan allred discusses the latest edition of their book, posttensioned concrete principles and practice 3rd edition as well as present the latest version. For this, the concrete slab is tensioned with a process called prestressing and the slab of concrete which comes out after this process is known. The purpose of this publication is to widen the understanding of post tensioned 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 posttensioned and conventional systems design elevated concrete slabs with or without posttensioning. Pt designer design of posttensioned concrete floors. Posttensioned concrete design spreadsheet program a pdh. Its more user friendly compared to other pt design softwares.
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