Table 1 Special provisions for shear walls with boundary elements.
From: Seismic Performance of Special Structural Walls Using Overlapping Hoops Instead of Closed Hoops
| Â | ACI318-14, KBC 2016 (special structural wall) | AIJ2010 (RC wall with boundary columns) | EN1998-1:2004(E) (ductile wall) |
|---|---|---|---|
l cr | Max{lw, Mu/4Vu} or more | Max{2 × smaller of lc and b, 1.5 × greater of lc and b} at the upper and lower ends of the wall | Max[lw, hw/6] or more |
Geometrical constraints | lc≥ greater of c − 0.1lw and c/2 | – | bw ≥  hs/15 for lc < 2bw, 0.2lw bw ≥  hs/10 for lc > 2bw, 0.2lw bw ≥ 200 mm |
s | Min{1/3b, 6dbL, 100 + [(350 − hx)/3]} or less | 100 mm or less | Min{b0/2, 175, 8dbL} or less for DCM Min{b0/3, 125, 6dbL} or less for DCH |
Amount of transverse reinforcement | Greater of \(0.09\frac{{f_{c}^{{\prime }} }}{{f_{yt} }}\) and \(0.3\left( {\frac{{A_{g} }}{{A_{ch} }} - 1} \right)\frac{{f_{c}^{{\prime }} }}{{f_{yt} }}\) | 0.002 or more | \(\omega_{wd}\)  ≥ 0.08 for DCM \(\omega_{wd}\)  ≥ 0.12 for DCH |