No of Ver. Rebar Effective to Resist Tensile Anchors
The
no of vertical rebars which are effective to resist the tensile anchors is
different in
LC 2&3 - with moment case and
LC 4 - without moment case.
Due to
the moment, in
LC 2&3 only part of anchors
nt in the group mobilize
tensile force and as such only part of rebar
nv-M
in concrete pedestal is
effective to resist the tensile
force, as illustrated below.
Tensile anchor
nt = no of anchors which are not closely around column
compression flange can be counted as tensile anchors
To get
nv-M
in
LC 2&3,
user needs to identify the tensile anchors
nt in the
group under
applied moment, and count all the vertical rebar around these
partial group of tensile anchors
nt within min( 0.5h
ef , 8" )
distance as the
no of vertical rebar
nv-M
ACI 318-11 RD.5.2.9