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pag 180 din pdf seismic design of reinforced concrete and masonry T.Paulay M.Priestleypag 376 stiffness pereti

Stiffness For columns with low axial loads (belowapproximately 0.1Ag fc), deformations caused by bar slip canaccount for as much as 50% of the total deformations at yield.The design professional is referred to Elwood and Eberhard(2009) for further guidance regarding calculation of the effectivestiffness of reinforced concrete columns that include the effectsof flexure, shear, and bar slip.

ASCE41 10.7 CONCRETE SHEAR WALLS PAG 246,248PAG 222 TABEL RIGIDITATI

SREN PAG 51 MODELAREA STR