CABLES

simple uses • suspension bridges • roof structures • transmission lines • guy wires, etc. • have same tension all along , can’t stand

compression – • struts do

• use high-strength steel • need – towers – anchors – stiffeners (hangers)

have spans & sag • don’t want movement • dynamic effects of wind – resonance

Cable Stayed Bridge

Cable Suspended Structure

EXAMPLECable Subjected to Concentrated Loads

EXAMPLE

Moment by vertical and horizontal components of CD

Equilibrium of forces at Joint C

Equilibrium of forces at Joint B

Cable Subjected to Distributed Load

Parabolic Cable: Subjected to Linear Uniform distributed Load

Example: Det max tens in cable and expression for curve