This verification example has been mooved to the following location:
http://communities.bentley.com/products/structural/structural_analysis___design/w/structural_analysis_and_design__wiki/17820.concrete-shear-wall-verification-aci-318-08-ram-concrete
Nice example. One small comment is on the spacing of transverse reinforcement in the boundary zone. ACI 318 §21.9.6.4(c) modifies 21.6.4.3(a) such that the spacing shall be one-third of the least dimension of the boundary element in lieu of one-fourth (required in §21.6.4.3(a) for frame columns).
Thus, the minimum spacing could be 12/3 = 4"