Vertical cables in a suspension bridge

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SUMMARY

The discussion centers on the mechanics of vertical cables in suspension bridges, specifically addressing the concept of shear stress. It clarifies that the adjustment of cable lengths ensures that no horizontal forces act on the bridge elements, which is crucial for structural integrity. The confusion regarding cable tension is resolved by emphasizing that the cables are not loose; rather, they are precisely tensioned to maintain equilibrium in the bridge structure. This understanding is essential for analyzing the forces at play in suspension bridge design.

PREREQUISITES
  • Basic understanding of suspension bridge mechanics
  • Familiarity with concepts of shear stress and tension
  • Knowledge of structural equilibrium principles
  • Experience with bridge design terminology
NEXT STEPS
  • Research the role of tension in suspension bridge cables
  • Study the effects of shear stress on bridge structures
  • Explore the principles of structural equilibrium in engineering
  • Learn about cable length adjustments in suspension bridge design
USEFUL FOR

Civil engineers, structural engineers, architecture students, and anyone involved in the design and analysis of suspension bridges.

OmegaKV
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Homework Statement


Problem 5 here:

http://www.princeton.edu/~romalis/PHYS203/HW1.pdf

Homework Equations


N/A

The Attempt at a Solution



The part that really confuses me is where it says that the cable lengths are adjusted so there is no shear stress on the bridge. What exactly does this mean? Does that mean the cables are loose enough that there is no tension in the cables? If that's the case, then what difference do the cables make?
 
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OmegaKV said:
Does that mean the cables are loose enough that there is no tension in the cables?
No, it means there are no horizontal forces on the bridge elements. If the cables would have lengths not matching the bridge structure you would get this.
 
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