Seismic Performance Evaluation of Steel frame buildings (A case study on existing Smart Parking System in Addis Ababa City)

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Addis Ababa University


Earthquake hazards have an effect on significant damage to structures and cause widespread failure throughout buildings. Therefore, the assessment of the structural behavior against possible earthquakes should be the fundamental point on the design and construction process. The seismic response and/or a performance prediction of buildings assessed based on nonlinear static analysis as it consumes less time to analysis and provides nearly equally reliable results with nonlinear dynamic analysis. Currently, in this research, the methodology is extended to assess the performance of 3D structural steel frames using a G+10 and G+15 Smart Parking Systems as a case study which are located in Addis Ababa city. Imperative issues regarding direction of load application, loading profile, diaphragm effects, beam to column joint model and arrangement of incremental static analysis results to generate required data for performance based evaluations have been studied. The result of this research shows that; the curve line for capacity curve (push over curve) of both case study buildings due to applying uniform lateral load distribution is above the capacity curve of triangular lateral load distribution. To this end, Conventional pushover analysis with triangular load pattern distribution gives higher displacement while the uniform lateral load pattern gives higher base shear. The Inter-Storey drift ratio of both the case study buildings is a maximum on the lower storey of the buildings. Hence, it concluded that failure of buildings due earthquake starts on the lower storey part of the buildings.



Seismic analysis, Response spectrum analysis, Elastic analysis, Pushover analysis, Steel frame, Capacity curve, Peak Ground Acceleration