Topic outline
- General
- Beams and Deck Types
Beams and Deck Types
Beam
Typical Economical Span
Form of Deck Construction
Economical Span Range (m)
Beam Depth Range(mm)
Typical Slab/Topping Depth (mm)
TY-Beam
Short and medium spans
Solid slab
4-17
400-900
125
TY-Beam
Short and medium spans
Beam & slab
7-17
550-850
125
Inverted T-Beam
Short and medium spans
Beam & slab
5-17
380-815
125-150
Inverted T-Beam
Short and medium spans
Solid slab
5-17
380-815
125-150
Y-Beam
Medium and long spans
Beam & slab
14-31
700-1400
200
SY-Beam
Medium and long spans
Beam & slab
27-45
1500-2000
200
M-Beam
Medium and long spans
Beam & slab
16-30
720-1360
200
MY-Beam
Short and medium spans
Solid slab
4-19
300-600
125
U-Beam
Medium and long spans
Voided
12-35
800-1600
200
- Prestress Losses
Prestress Losses
- Relaxation of prestressing tendons (time dependant)
- Shrinkage and creep of concrete (time dependant)
- Duct friction
- Elastic deformation
- SLS Design
SLS Design
In most cases, the serviceability limit state (SLS) will govern for prestressed structural design. Following check may need to be carried out.
- Decompression
- Crack widths
- Stress limits
- Transfer and Tendon Arrangement
Transfer and Tendon Arrangement
- Design Standards
Design Standards
- Bridge Design Calculations PDF
Bridge Design Calculations PDF
Prestressed concrete design to eurocodes PDF is coming soon.