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Eugene City Hall R32.19.04 Rev. B. September 9, 2003 <br /> <br />Reinforced Masonry Walls <br /> <br />Slight Structural Damage: Diagonal hairline cracks on masonry wall surfaces; larger <br />cracks around door and window openings in walls with large proportion of openings; <br />minor separation of walls from the floor and roof diaphragms. <br />Moderate Structural Damage: Most wall surfaces exhibit diagonal cracks; some of the <br />shear walls have exceeded their yield capacities indicated by larger diagonal cracks; some <br />walls may have visibly pulled away from the roof. <br />Extensive Structural Damage: Most shear walls have exceeded their yield capacities <br />and some of the walls have exceeded their ultimate capacities indicated by large, through~ <br />the wall diagonal cracks and visibly buckled wall reinforcement. <br />Complete Structural Damage: Structure has collapsed or is in imminent danger of <br />collapse due to failure of the wall panels. <br /> <br /> Concrete Columns and Floor System <br /> <br /> Slight Structural Damage: Flexural or shear type hairline cracks in some portions of <br /> waffle slabs and columns near joints or within joints. <br /> Moderate Structural Damage: Most waffle slabs near columns and most columns <br /> exhibit hairline cracks; a few locations may exhibit larger shear cracks and spalling. <br /> Extensive Structural Damage: Some of the columns and waffle slabs have reached their <br /> capacity indicated by spalled concrete and buckled main reinforcement; short columns <br /> may have suffered shear failures or bond failures at reinforcement splices which may <br /> result in partial collapse. <br /> Complete Structural Damage: Structure is collapsed or in imminent danger of collapse <br /> due to brittle failure of nonductile elements or loss of frame stability. <br /> <br /> Concrete Shear Walls <br /> <br /> Slight Structural Damage: Diagonal hairline cracks on most concrete shear wall <br /> surfaces; minor concrete spalling at few locations. <br /> Moderate Structural Damage: Most shear wall surfaces exhibit diagonal cracks; some <br /> shear walls have exceeded yield capacity indicated by larger diagonal cracks and concrete <br /> spalling at wall ends. <br /> Extensive Structural Damage: Most concrete shear walls have exceeded their yield <br /> capacities; some walls have exceeded their ultimate capacities indicated by large, <br /> through-the wall diagonal cracks, extensive spalling around the cracks and visibly <br /> buckled wall reinforcement. <br /> Complete Structural Damage: Structure has collapsed or is in imminent danger of <br /> collapse due to failure of most of the shear walls and failure of some critical columns. <br /> <br /> G&E Engineering Systems Inc. Page 31 <br /> <br /> <br />