Forces: Tension and Compression

From the Fundamentals of Bridge Engineering curriculum ยท Updated Jan 11, 2026

Structural Analysis

Every bridge must balance two primary forces: Compression (pushing together) and Tension (pulling apart).

Bridge Types & Forces:

  • Suspension Bridge: Main cables are in high tension; Towers are in high compression. Best for long spans (e.g., Golden Gate).
  • Arch Bridge: The entire structure is in compression. The force is transferred outward to the abutments.
  • Beam Bridge: The top of the beam is in compression, bottom is in tension. Limited span length.

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