problem description
title="Hinge Sample" nodes=3 elements=2

nodes
1 x=0	y=0	constraint = fixed
2 x=10	y=0	constraint = hinge force=point
3 x=15  y=0	constraint = fixed

beam elements
1 nodes=[1,2] material=steel
2 nodes=[2,3] 

material properties
steel A=1 E=210e9 Ix=4e-4

constraints
fixed tx=c ty=c rz=c
hinge tx=u ty=u rz=h

forces
point Fy=-10000

end
