10-23-2009, 09:34 AM
(3) Stiffnes modifiers for beams,columns,walls,slabs needed on when nonlinear
analysis not performed.
core: modifiers should be provided, special for crack condition. UBC and other codes specifics this. There are no full 100% I value in reality.
Usually for beams of moment resisting frame, can be 0.3I (I is for regtangular section), but considering T beam in reality as twice as regtangular beam's stiffness, shoud be 0.3x2=0.7I
analysis not performed.
core: modifiers should be provided, special for crack condition. UBC and other codes specifics this. There are no full 100% I value in reality.
Usually for beams of moment resisting frame, can be 0.3I (I is for regtangular section), but considering T beam in reality as twice as regtangular beam's stiffness, shoud be 0.3x2=0.7I