Evaluation of Damage Index of Steel Moment Resistance frames Before and After Seismic Rehabilitation by Steel Braces and Shear Wall

Naderi, Mahmoud; Rezaeian, Alireza; Tanoorsaz, Maryam

doi:10.22034/jss.2010.238435

Evaluation of Damage Index of Steel Moment Resistance frames Before and After Seismic Rehabilitation by Steel Braces and Shear Wall

Document Type : Original Article

Authors

Mahmoud Naderi

Alireza Rezaeian

Maryam Tanoorsaz

Assistant Professor, Faculty of Technology and Engineering, Islamic Azad University, Karaj Branch

10.22034/jss.2010.238435

Abstract

For investigating of structure, performance according to Instruction of seismic rehabilitation is suggested using of linear and nonlinear static and dynamic analysis. Moreover, for accurate evaluation of structure and to specify damage quantity, using of damage indexes that practiced them in some recent decades can be suitable approach. Advance of application of damage indexes is this that in addition to damage quantity specifies state of structure. In this paper, A steel structure investigated according to Instruction of seismic rehabilitation of existing buildings (publication No.360) and with using of two damage indexes of «Ghobara» and «Krawinkler and Zohrei» that are respectively based on stiffness and cumulative deformation were determined, the damage and state of structure then with using of concentric and eccentric braces and shear wall, the structure was rehabilitated and for specifying effect of approach rehabilitation on structure performance determined state and damage index again. Results shown that the eccentric braces had better seismic performance.

Keywords

Steel Moment Frame

Steel Braces

Shear Wall

Seismic Rehabilitation

Damage Index