4.13.7. UserDefined

beamIntegration('UserDefined', tag, N, *secTags, *locs, *wts)

Create a UserDefined beamIntegration object. This option allows user-specified locations and weights of the integration points.

tag (int)	tag of the beam integration
N (int)	number of integration points along the element.
secTags (list (int))	A list previous-defined section objects.
locs (list (float))	Locations of integration points along the element.
wts (list (float))	weights of integration points.

locs = [0.1, 0.3, 0.5, 0.7, 0.9]
wts = [0.2, 0.15, 0.3, 0.15, 0.2]
secs = [1, 2, 2, 2, 1]
beamIntegration('UserDefined',1,len(secs),*secs,*locs,*wts)

Places N integration points along the element, which are defined in locs on the natural domain [0, 1]. The weight of each integration point is defined in the wts also on the [0, 1] domain. The force-deformation response at each integration point is defined by the secs. The locs, wts, and secs should be of length N. In general, there is no accuracy for this approach to numerical integration.