Comparison of Seismic Performance of Structural Systems Moment Frame, Concentric Braced Frame and Buckling Restrained Braced Frame Using Damage Index

Document Type : Research Paper


1 Department of Civil Engineering, Engineering Faculty, Mashhad Branch, Islamic Azad University, Mashhad, Iran

2 Assistant Professor, Department of civil engineering , Ramsar Branch, Islamic Azad University, Ramsar, Iran

3 Ph.D. Candidate, Faculty of Engineering, Department of Civil Engineering, University of Sistan and Baluchestan, Zahedan, Iran.

4 Assistant Professor, Department of Civil Engineering, Ramsar Branch, Islamic Azad University, Ramsar, Iran


When a structure is exposed to an earthquake, depending on the severity of the earthquake, it may be completely destroyed or remain completely intact, or some of its members may become out of their stable state, and in any case, it may be damaged. The damage can be seen in decreasing the stiffness or increasing the softness and shifting the roof and by changing the drift of stories and hysteresis energy. In recent years, with advances in structural-earthquake engineering, advancing knowledge and experience about the seismic behavior of structures, new methods for evaluating the seismic behavior of structures have been proposed to express a damage amount and the quality of the damage requires the definition of the indicators of the damage. In this paper, the performance of a 10-story frame with three suitable lateral systems of moment frame (MF), concentric brace (CBF) and buckling restrained brace (BRBF) is investigated from the theoretical point of view of seismic damage index. Damage indices such as Drift, Park-Ang, Energy, Deformation, Roufaiel and Meyer and Banon Failure under near-fault earthquakes are calculated and compared based on nonlinear dynamic time history analysis using SeismoStruct 2018 software. Therefore, the seismic performance of these systems under near fault earthquakes can be properly investigated. The results showed that the values of the damage index BRBF were in the limited range and its performance is more appropriate compared to the other two systems.


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