Tension

Definition

Tension is a force that pulls or stretches materials, acting along the length of a member in a structure. It plays a crucial role in the behavior of various structural systems by ensuring stability and balance, especially in elements like cables, beams, and rods. Understanding tension helps in analyzing how forces are distributed in structures, which is essential for ensuring their safety and effectiveness.

5 Must Know Facts For Your Next Test

1. In truss bridges, tension members are critical for transferring loads and maintaining the structural integrity of the bridge by counteracting compressive forces.
2. Arch bridges rely on tension in cables or ties to stabilize the arch against deformation and provide support, preventing failure from bending.
3. Suspension bridges utilize tension in the main cables to support the deck, effectively distributing loads from the bridge down to the towers.
4. The maximum tensile strength of materials determines how much tension they can withstand before failing, making material selection vital in design.
5. Tension can cause elongation in materials, which must be accounted for in structural design to prevent unwanted deformation.

Review Questions

• How does tension contribute to the stability of truss bridges?
  • Tension is crucial for maintaining stability in truss bridges as it allows for efficient load transfer between members. Tension members work together with compression members to form a balanced system that can withstand applied loads. The arrangement of these members ensures that forces are effectively distributed throughout the structure, preventing collapse and enhancing safety.
• Discuss the role of tension in arch bridges and how it interacts with other forces.
  • In arch bridges, tension plays a vital role in supporting the structure against bending moments caused by external loads. Tension members, such as cables or ties, help stabilize the arch by counteracting the forces that seek to deform it. This interaction between tension and compression ensures that the arch maintains its shape and functionality under load, which is essential for the bridge's longevity and performance.
• Evaluate the impact of material choice on the performance of tension members in suspension bridges.
  • The choice of materials for tension members in suspension bridges significantly affects their overall performance and safety. Materials with high tensile strength, like steel or advanced composites, are preferred to ensure that the cables can support heavy loads without failing. Additionally, understanding how different materials respond to tension, such as elongation or fatigue under repeated loading, is critical for designing durable structures that can withstand environmental factors and traffic demands over time.

Related terms

Compressive Force: A force that acts to compress or shorten an object, usually resulting in the opposite effect of tension.

Equilibrium:

A state where the sum of all forces and moments acting on a structure is zero, ensuring that the structure remains stable and does not move.

Load Distribution:

The way in which forces are spread out over a structure, affecting how tension and compression are experienced by various components.