Is it possible to apply the load at the shear center of a BEAM188?


In Release 10.0, it is possible to apply a load at the shear center of a BEAM188 element using the SECOFF,SHRC command. The calculated deflection of BEAM188 is greater if the load is applied at the center of mass, because rotation and warping contribute to the total calculated deformation. If the load is applied at the shear center, the calculated deformation agrees with hand calcs (PL^3/3EI) for bending deformation. If the load is applied at the mass center the calculated deflection is approximately twice the bending deformation.


! hand calculated deflection = 0.007"

lc_ = 1
wc_ = .1

/prep7
et,1,188,1
mp,ex,1,10e6
mp,prxy,1,.3
mp,dens,1,1e-5
sectype,1,beam,chan
secdata,lc_,lc_,lc_,wc_,wc_,wc_
n,1
n,2,10
n,3,0,1
e,1,2,3
d,1,all,0
f,2,fy,10

/solu
solve

/post1
set,last
/com,
/com, load applied at center of mass
/com,
prnsol,dof

/prep7
ddele,all
fdele,all
secoff,shrc
d,1,all,0
f,2,fy,10

/solu
solve

/post1
set,last
/com,
/com, load applied at shear center
/com,
prnsol,dof





Show Form
No comments yet. Be the first to add a comment!