Cables and uses of cable in civil engineering

1. Cables
Group Members
Ammad Mustafa BECE-0549
Amir Ashfaq BECE-1492
Civil Engineering Department
Abasyn University, Islamabad

3. Cables
• Cables can be made up of mild steel
and it have high strength.
• Structural cables are made of a series
of small strands twisted or bound
together to form a much larger cable.
• Steels cable are either spiral strands,
where circulars rods are twisted
together and “Glued” using a polymer.
• Cables can holds tension forces not
the compression.

4. Uses of cable in Structures
• Bridge
• Shades

5. Types of Cable Suspension Bridge
1). TYPICAL SUSPENSION BRIDGE
The deck (traffic way) of a
suspension bridge is hung by
suspender cables which hang
from master cables (resting on
the towers). The cables transfer
the weight to the towers, which
transfer the weight to the ground.

6. CABLE STAYED BRIDGE
Cable-stayed bridges have towers,
but cables from the towers go
directly to the road deck, instead
of spanning from tower to tower.

7. Methods of Analysis of cables
1. SkyCiv Structural 3D Cloud Engineering Software.
2. By equilibrium Equation.

8. Examples of cable Suspension Bridge
1). Akashi Kaikyō Bridge
Span length : 1991 meter
Country : Japan

9. 2). Xihoumen Bridge
• Span length : 1650 meter
• Country : China

10. 3). Great Belt Fixed Link
• Span length : 1624 meter
• Country : Denmark

11. Advantages of Cable Bridges
• Longer main spans
• Less material may be required than other bridge types, even at spans
they can achieve, leading to a reduced construction cost
• A suspension bridge can be made out of simple materials such as
wood and common wire rope.
• May be better to withstand earthquake movements than heavier and
more rigid bridges

12. Dis-Advantages of Cable Bridges
• Considerable stiffness may be required to prevent the bridge deck
vibrating under high winds
• The relatively low deck stiffness compared to other (non-suspension)
types of bridges makes it more difficult to carry heavy rail traffic
where high concentrated live loads occur