Static equilibrium A structures can be in static equilibrium if
the following conditions are met;
1. For a
3dimensional structure ( space structure), equilibrium requirement
is force and moment balance along three independent
(perpendicular) axes. ΣFx = 0, ΣFy = 0, ΣFz = 0,
ΣMx = 0, ΣMy = 0, ΣMz = 0,
2. For a 2dimensional structure ( planar structure)),
equilibrium requirement is force balance along two perpendicular
axes (in the plane) and moment balance about an axis perpendicular
to the plane. ΣFx = 0, ΣFy = 0,
ΣMz = 0,
The above conditions of static equilibrium can
be used to find the
support reactions. Freeboy
diagrams, which show all the reactions and applied loads on the body
are required to be drawn before applying the equations of static
equilibrium. Solved examples on calculation of
support reactions
Problem 41,
Problem 42
and
other solved examples What is
shearing
force and
bending
moment? What is
indeterminate structure?
Moment
Distribution Calculator^{New}
Easy to use calculator for solving Indeterminate beams with
different load
