Doc a study on posttensioning slab ajay nagaraj academia. The present study focuses on posttensioned flat slab systems with respect to strength, service and cost estimation. Learn about the safe concrete slab analysis and design program. Construction of post tensioned slabs on grade is very similar to using reinforcing steel, except for the tensioning step.
Post tensioned concrete is a term heard more and more in the construction industry today. Reinforced or posttensioned mat foundations, with or without grade beams. Posttensioned pt slabs are typically flat slabs, band beam and slabs or ribbed slabs. Pdf analysis and design of rcc and posttensioned flat slabs. Software for plates and shells, pineridge press, swansea, uk, 1984. Adaptsog slabongrade design software, sog foundation with soil. Post tension slab working principle, components and. Posttension basics how posttensioned slabs are built. Mlaw authored publications, documents and software. Post tension slab design software structural engineering. 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 institutes design of posttensioned slabs onground, pti design procedure 3rd edition. Posttensioned concrete design spreadsheet program a pdh. Posttensioning institute education education programs. The pti design procedure is used to design a slab on 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. Adaptsog software for the design of posttensioned slabs on grade foundations on expansive and compressible soils. Post tensioning will reduce cracking and keep any cracks that might. Cables are arranged as indicated by the engineer and chaired to run through the center of the slab. Posttensioning is a method of reinforcing strengthening concrete or other materials with highstrength steel strands or bars, typically referred to as tendons.
Slabongrade and posttensioned slab software adaptsog. Since designing the very first residential posttensioned slabonground in central texas in the. Pt slabs offer the thinnest slab type, as concrete is worked to its strengths. This method of reinforcing concrete enables a designer to take advantage of the considerable benefits provided by prestressed concrete while retaining the flexibility afforded by the castinplace method of building concrete structures.
Flexural testing of the posttensioned twoway slabs was conducted to validate. Download free, highquality cad drawings, blocks and details of posttensioned concrete organized by masterformat. 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. Market for posttensioning tendons over 40% of all pt tendons sold in the usa are for residential foundations. For residential construction, tendons at 48 inches on center are common. This video tutorial is about pts posttension slab design which is trained by master of structural engineering mr. 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. Boskey bahoria at rajiv gandhi college of engineering. The designs were analysed using adapt builder software with different panel sizes. Post tensioned foundations are designed using the post tensioning institute pti method first published in 1980 and recently updated with its 3rd edition. Typical post tensioned ribbed foundation for residential construction with tendons placed in the center of the slab at approximately 48 inches on center in each direction.
This work was supported by a national research foundation of korea. The designs were analysed using adapt builder software with. The design of post tensioned flat slab can be done by using load balancing and equivalent frame method. Posttensioned slab on grade 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 post tensioned foundations slabs on expansive soils. Project examples to illustrate various uses of post tensioning in buildings, tendon arrangement in common floor systems, use of external post tensioning in the retrofit of an existing slab, facts and myths about post tensioned as compared to reinforced concrete slabs. This hybridisation helps achieve the formation of a much thinner slab with a longer span devoid of any columnfree spaces. Advantages of using post tensioning for your next slab onground project. In addition, posttensioned concrete slabs with proper posttensioning show little.