Podium Slab Design Example P17 Post-Tensioned Bridges 19 Mar 2020 B1. Post-tensioned PT concrete floors are now widely used in the UK particularly for high-rise buildings.
Post Tension Slab Design Basic Concept Youtube
The PTI Design Method Based upon a finite element computer model of soilstructure interaction with research sponsored by PTI and executed at Texas A M University in late 1970s 1.
. Resistance of a slab the design moment M ed transferred from the slab to a column and the design shear V ed are obtained from the relevant analysis. If the use of flat plate is not adequate the use of a slab system with slab bands will be investigated. PT 101 Buildings Bridges Parking Structures Repair Rock-and-Soil Anchors Slab-on-Ground Publications Technical Sessions Slab-on-Ground Post-tensioned slabs-on-ground provide a cost-efficient high-performance solution for problems associated with ground-supported residential foundations on shrink-swell soils.
The analysis is performed on design strips perpendicular to the slab bands Transverse Bands. However main reinforcement bar and distribution bar in transverse direction. Pre shop drawings stage.
𝑀𝐸 006 135 𝐺075 𝑙𝑡𝑙 2. Edition published in 1980 2nd Edition in 1996 Incorporated into model building codes UBC 1997 IBC 2000 Used to design millions of existing foundations. The use of flat plate system will be checked first.
Instead for most floor slabs sub-grade reaction values are estimated from the soil classification or other standard tests. Design of PostTensioning Building Structures March 12 2020 2020 EduCode Las Vegas PTI 4 PRETENSIONING 1Tension Strands 2Cast Concrete Bond strands to concrete 3Cut Strands Transfer force to concrete POSTTENSIONING 1Cast Concrete with Duct 2Feed Strands through Duct 3Tension Strands 4Grout Duct or other corrosion protection Section. A more detailed guide to the design of PT floors can be found in The Concrete Societys Technical Report 43 TR43.
Course Study on Post Tension Slab Design. Post-Tensioning Slab Procedure Placement of Bottom Reinforcement Mesh Placing Flat Duct along with Strands in both Directions Concreting After 3 Days Transferring 25 of Total Prestress Force to avoid Shrinkage and Temperature Cracks Transferring remaining 75 of Prestress Grouting of Duct Two Way Slab with Bonded PT. The load distribution of a two way slab is by dividing the slab in two triangles each having an angle of 45 degrees and two trapezoids as shown in figure.
CE 433 Reinforced Concrete Design Summer 2013 Example Slab Design 1 2 Material Properties Geometry compressive strength of concrete fc 5000 psi span length of slab beam spacing L 18 ft center to center coefficient for depth of stress block 1 080 width of supporting beam bsupport 14 in yield strength of reinforcement fy 60000 psi clear span Ln 1683 ft L - bsupport12. Sample of an Engineering PT slab drawing A sample of a Post Tensioned Slab Reinforcement Plan Download this sample AutoCAD 2000 format 68kb. This article provides information on how to scheme a PT slab and how the use of post-tensioning affects the rest of the structure.
Plan View of Floor System Assume partitions will not be damaged by deflections. These are the engineering design drawings produced for costing etc. All anchorage locations live ends dead ends couplers etc.
This calculator provides design of one way slab for simply supported and continuous slab conditions. Self weight 60 KNm2 Total dead load 40 60 100 KNm2 Total live load 30 KNm2 Balanced load. Round slab thickness up to the nearest ¼.
This example will examine two-way floors with slab bands systems. Precast Prestressed Spliced and Post-Tensioned Bridge Design B103 19 Mar 2020. Longer span lShorter span b 2.
WSD 20 psf wLL 80 psf fc 4000 psi fy 60000 psi span. For normal slab load and initial span we can take spandepth 42 10000 240mm 42 Punching shear affected by size of column and slab thickness. M ed is that part of the unbalanced slab bending moments that is transferred into the column at the support.
When a slab is supported on all four sides and the ratio of long span to short span is equal or greater than two it will be considered as one way slab. Computation and Verification 19 Mar 2020 P46. The plate test is not used for most slab on grade projects.
However to reduce shear reinforcement requirement a depth of 250 mm is chosen. CE 433 Fall 2006 Slab Design Example 1 6 Design a one-way slab for an exterior bay of a multi-story office building using the information specified below. This is advantageous if the designer wishes to obtain a shallower footing but with more steel and in cases of the grade of the slab steel being different to the grade of sub-beam steel FAARFIELD provides the required thickness of the rigid pavement slab 875 9 Brick Wall Slab h A A Section AA Learn design principles and best practices with our Make.
Hyperstatic Moments from Post-Tensioning. For example the k value can be estimated from correlations such as that shown in Table 2. Two way slab Two way slab is a slab having an aspect ratio less than 2.
Structural Design of Column-Supported Concrete Floors 19 Mar 2020 P45. The load on the slab is carried by the short span in one direction.
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