4.15.2.3. Layer Command

layer(type, *args)

The layer command is used to generate a number of fibers along a line or a circular arc.

layer('straight', matTag, numFiber, areaFiber, *start, *end)

This command is used to construct a straight line of fibers

matTag (int)	material tag associated with this fiber (UniaxialMaterial tag for a FiberSection and NDMaterial tag for use in an NDFiberSection).
numFiber (int)	number of fibers along line
areaFiber (float)	area of each fiber
start (list (float))	y & z-coordinates of first fiber in line (local coordinate system)
end (list (float))	y & z-coordinates of last fiber in line (local coordinate system)

layer('circ', matTag,numFiber,areaFiber,*center,radius,*ang=[0.0,360.0-360/numFiber])

This command is used to construct a line of fibers along a circular arc

matTag (int)	material tag associated with this fiber (UniaxialMaterial tag for a FiberSection and NDMaterial tag for use in an NDFiberSection).
numFiber (int)	number of fibers along line
areaFiber (float)	area of each fiber
center (list (float))	y & z-coordinates of center of circular arc
radius (float)	radius of circlular arc
ang (list (float))	starting and ending angle (optional)