pt slab design example

kissling March 30, 2022 design , example , pt Comment

This example highlights code based selection of drop panel. Shear strength of beamless slabs usually a controlling factor.

How To Draw Pt Concrete Slabs

The EFM solution is also used for a detailed comparison with the analysis and design results of the engineering software program spSlab.

. 3 0 - 4 0 f t. 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. The proposed slab system must meet the current code.

Longer spans can be achieved due to prestress which can also be used to counteract deflections. Plan View of Floor System Assume partitions will not be damaged by deflections. 2795 mm Balconies 95-in.

For general design philosophy and analysis of post-tensioned concrete the reader should refer to PDHonline Course s127. The proposed slab system must be able to be constructed at a reasonable cost. Design of PostTensioning Building Structures March 12 2020 2020 EduCode Las Vegas PTI 22.

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. The codes governing the design of the one-way slab will be ACI 318-02 and IBC 2003. The minimum thickness can be determined by many factors.

General Overview of Post-Tensioned Concrete Design. It is especially critical where drainage can be an issue in cases such as roofs parking garages and balconies and with flat plates where long term. Course Content This spreadsheet program provides for the design and analysis of post-tensioned concrete one-way beam and slab systems and two-way flat plate slab systems.

Course Study on Post Tension Slab Design. PT Designer is a computer program for the design and analysis of linear post-tensioned concrete floor systems. Post-tensioned slabs-on-ground provide a cost-efficient high-performance solution for problems associated with ground-supported residential foundations on shrink-swell soils.

Selection of Technical Notes and Articles on post-tensioning to view or download. Up to 24 cash back One-way simply supported slab Analysis and design of the slab similar to design of simply supported beam as indicate in the previous chapter. Stay tuned for full courseTo get the excel sheet join as loving fansub member to this channel.

60-80 of DLselfweight for slabs good approximation for hand calculation For this example. A 2 2Area 2 A c 2 2 Post-Tensioned Concrete Design Table 1-1 List of Symbols Used in the ACI 318-08 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 sq-in A oh Area enclosed by the centerline of the outermost closed. PT slabs offer the thinnest slab type as concrete is worked to its strengths mostly being kept in compression.

The Equivalent Frame Method EFM presented in ACI 318-14 is illustrated in detail in this example to analyze and design two-way flat slab with drop panels system. Deep 1524 1524 by 457 mm. Deep 610 by 457 mm Column base 60 60-in.

EXAMPLE LOAD BALANCING Determine portion of total dead load balanced by prestressing w DL 020 klf superimposed dead load 10psf20ft w sw 206 klf self weight including tributary width of slab Load Balancing Service Stresses Design Moment Strength. Edition published in 1980 2nd Edition in 1996 Incorporated into model building codes UBC 1997 IBC 2000 Used to design millions of existing foundations. However to reduce shear reinforcement requirement a depth of 250 mm is chosen.

203 mm Foundation slab 10-in. The thickness of a floor slab must be determined early in design because the weight of the slab is an important part of the dead load of the structure. Slab must be thick enough to provide adequate shear strength.

Round slab thickness up to the nearest ¼. Podium slab thickness 11-in. 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.

The program is developed around the robust computational core of two popular programs PTDataNet and PTPlusNet which many engineers have come to trust over the years for its accuracy and flexibility. General Objectives in Building Design Applications of Post-Tensioning in Building Structures The VSL Hardware for Use in Buildings Details and Layouts Improving the Constructability Preliminary Sizing of Post-Tensioned Floors Examples PUBLISHED BY VSL INTERNATIONAL LTD. Post-tensioned PT slabs are typically flat slabs band beam and slabs or ribbed slabs.

Steel tendons are stressed after the concrete has been placed and gained sufficient strength at the construction sites Example. Steel reinforcement are stressed prior to concrete placement usually at a precast plant remote from the construction site Example. 305 457 mm Walls 8-in.

Hollow Core Slab Bridge I Girders Post Tensioning. Extend horizontally from center line column at least 16 center line span. M ed is that part of the unbalanced slab bending moments that is transferred into the column at the support.

Pre Tensioning. Construction Type Continuous Span Simple Span Roof Floor Roof Floor One-Way Solid Slabs 50 45 45 40 Two-Way Solid Slabs 45-48 40-45 NA NA Beams 35 30 30 26 One-Way Joists 42 38 38 35 Typically tendons are located near the. PT beams and slabs have an inherent advantage over non-PT members when it comes to deflection.

254 mm Foundation slab perimeter 24-in. Pre and Post Tensioned Concrete. But it is still critical to check and correct for long-term deflection at the design stage.

𝑀𝐸 006 135 𝐺075 𝑙𝑡𝑙 2. BS 8110 if the following conditions applied. 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.

DESIGN CRITERIA There are three criteria which must be considered for the design of a conventional one -way slab system. Flat Slab wDrop Panels TwoWay Twoway Slabs. For 1m slab width Moment Shear Force One-way Continuous slab For continuous slab moment and shear force can be obtained from Table 312.

075 w DL 075100 psf 75 psf Cover Requirements 2-hour fire rating assume carbonate aggregate IBC 2003 Restrained slabs 34 bottom Unrestrained slabs 112 bottom 34 top TIME SAVING DESIGN AIDS Page 2 of 9 Two-Way Post-Tensioned Design. WSD 20 psf wLL 80 psf fc 4000 psi fy 60000 psi span 80 ft. Design better buildings with smart safe and cost-effective post-tensioned and reinforced concrete expertise.

The compressive stresses resist the anticipated tension stresses induced by the soil movements enhancing the performance over a non-prestressed foundation. 2415 mm Columns 12 18-in.

Structure Magazine Post Tensioning Design