Advantages of Pre-stressing:
The pre-stressing of concrete has several
advantages compared to traditional reinforced concrete (RC) without
pre-stressing. Following are the advantages of the pre-stressed concrete member
over an equivalent RC member.
(1) Section remains un-cracked under
service load
- while it is un-cracked will cause reduction of steel corrosion ultimately increases the durability.
- Full section is utilized (mean higher amount of inertia) >Higher stiffness > less deflection (improved serviceability).
- Increase in shear capacity.
- Suitable for use in pressure vessels & liquid retaining structures.
- Improved performance under dynamic & fatigue loading.
(2) Higher span to depth
ratio
- Larger spans are possible with pre-stressing (bridges. buildings with column free spaces).
- For the same span less depth is required compared to RC members (reduction in self weight).
- More aesthetic appeal due to slender section
- More economical section because of smaller sections & less weight.
(3) Suitable for pre-cast
construction
- Rapid construction
- Better quality control
- Reduced maintenance
- Suitable for repetitive construction
- Multiple use of form work
- Availability of standard shapes
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