1. EXTERNAL FACTORS
ACTING ON SUSPENSION BRIDGE
Wind
 Wind conditions are acknowledged to affect the performance of cable
supported bridges, since the deck structure is comparatively more
flexible compared to other bridge structural systems.
Traffic & Vehicle Mass
 Increased load raises bridge’s stiffness and vibrations increased.
 May cause the bridge to collapse.
Temperature
 Expansion and compression of the structure.
 Reduce stiffness of structure.
Corrosion
 When a bridge is made of steel, corrosions occur and cause the
bridge to become weaker.
 This is why galvanized steels are used to build modern suspension
bridges.