Structural Strength and Stability
loads
static loads
live load
a car driving over a bridge is a live load
dead load
a dead load is a non moving load
static loads don't change in size
Dynamic Load
a dynamic load is a load that can change size like wind
external forces
Plane of Application
the plane of application is the angle that the force is applied
Point of Application
the point of application is where a forces is applied on a horizontal line
Direction
direction is the way a forces pushes
Magnitude
Magnitude is how big the force is
Strengthening Structures
triangles
truss
Truss are triangles that improve stability
gusset
Gussets are triangles that improve stability on joints
curves
arch
An arch is a curved structure
ties
ties resist torsion forces
struts
struts resist compression forces
Corrugation
corrugation uses arches or triangles to make something stronger with out adding muck weight
Lamination
lamination uses layers stuck together something stronger
internal forces
tension
tension happens when two forces pull away from each other
Torsion
Torsion is a twisting force
shear
Shear is a cutting force
compression
compression happens when two forces push together
stability
stable
A stable structure won't fall
unstable
An unstable structure's center of gravity is out side of the base of support
center of gravity
the point on a structure that the weight is perfectly balanced
base of support
the base of support is the area of the structure that surrounds the center of gravity
