post tension slabs(PT slabs) part 1 WHY POST TENSION??
Why Post Tension??
For all civil engineers and for all civil students, we all believe that choosing Post Tension is one of the best decisions in many cases specially in big spans with deflection probability.
Using Post Tension slabs or beams is very useful to resist the deflection when it's coming necessary to build that mush of big spans (halls, theaters, cinemas, schools, palaces..) which will lead to high deflection in the horizontal elements.
When the structural engineer choosing to use PT in slabs or beams that means he is looking forward cost saving as he will reduce the dimensions of the elements even in slab thickness or beams depth.
4-The effect of strand (cable) stressing on then beam(compression).
5-PT beam after stressing showing the deformed shape and here with negative deflection(uplift).
6-Loaded PT beam with final shape of the beam without deflection.
That's in direct cost saving because of using PT, in another way in case if using PT we have another indirect cost saving coming from manpower saving and saving in materials due to earlier de-shuttering so we can use the same shuttering materials in another locations, in PT slabs we are able to remove the 50% of shutter and scaffolding after 4 to 5 days instead waiting more than 10 days in RC slabs.
Due to reducing slabs and beams thickness the building wight will be reduced so all elements dimensions will be reduced and this also coming in cost saving.
Conclusion...
PT helping to build big spans without scaring of deflection.
PT in horizontal elements giving many advantages specially in commercial point of view.
In the next part will explain how to install PT in slabs or beams and Post Tension components.
we need your support to continue.
For all civil engineers and for all civil students, we all believe that choosing Post Tension is one of the best decisions in many cases specially in big spans with deflection probability.
Using Post Tension slabs or beams is very useful to resist the deflection when it's coming necessary to build that mush of big spans (halls, theaters, cinemas, schools, palaces..) which will lead to high deflection in the horizontal elements.
When the structural engineer choosing to use PT in slabs or beams that means he is looking forward cost saving as he will reduce the dimensions of the elements even in slab thickness or beams depth.
The upper figure shown how the PT affecting and reducing the deflection in the horizontal structural elements in each case.
1-Normal beam with loads in the original condition without deflection.
2-The beam after loading and showing the deformed shape(in case of normal RC beam).
3-PT beam before stressing or loading.4-The effect of strand (cable) stressing on then beam(compression).
5-PT beam after stressing showing the deformed shape and here with negative deflection(uplift).
6-Loaded PT beam with final shape of the beam without deflection.
That's in direct cost saving because of using PT, in another way in case if using PT we have another indirect cost saving coming from manpower saving and saving in materials due to earlier de-shuttering so we can use the same shuttering materials in another locations, in PT slabs we are able to remove the 50% of shutter and scaffolding after 4 to 5 days instead waiting more than 10 days in RC slabs.
Due to reducing slabs and beams thickness the building wight will be reduced so all elements dimensions will be reduced and this also coming in cost saving.
Conclusion...
PT helping to build big spans without scaring of deflection.
PT in horizontal elements giving many advantages specially in commercial point of view.
In the next part will explain how to install PT in slabs or beams and Post Tension components.
we need your support to continue.
Comments
Post a Comment