Evaluation of Damage Distribution in Elements of Dual Frames

During severe earthquakes, many structures yield and experience large inelastic deformations. Design procedure in current seismic design codes, is based on elastic behavior of structures and considersinelastic deformations implicitly. This fact results in inadequacy of current design practice asresearches show. Taking into account inelastic behavior of structural elements may better predict seismic responses. In the present study, three steel structures with dual system consisting of intermediate moment-resisting and concentric-braced frames that are widely used in medium and high-risebuildings, have been designed based on allowable stress design method. Then, inelastic seismic responses have been determined under three earthquake records by the PERFORM 3D software andhysteretic energy and damage state of structural elements have been evaluated in detail. Finally, bycolumn strengthening, it has been tried to reduce structural damages. The results indicate that this approach is an efficient technique to make the damage distribution uniform among structural members

Keywords:

Seismic Damage , Damage Distribution , Hysteretic Energy , Nonlinear Dynamic Analysis , Dual Steel Buildings