Assessment Of Seismic Vulnerability Of Reinforced Concrete Buildings

This thesis is conducted to evaluate seismic vulnerability and investigate nonlinearrnbehaviors of existing reinforced concrete buildings constructed in Addis Ababa. The paperrnexamines four structures using nonlinear dynamic analysis software (IDARC 2D ver. 7.0).rnEach of these structures will be analyzed for three peak ground accelerations of 0.05g,rn0.07g and 0.10g.rnThe finding of this research is that two of the four buildings will collapse immediatelyrnwhen an earthquake (of intensity 0.05g, 0.07g and 0.10g) occurs. It is also found that thernother two buildings resist the seismic loads that will occur during an earthquake and thernstory force deformation time history responses of these two buildings show stiffnessrndegradation, strength decay and pinching behaviors of reinforced concrete structures.rnIt was concluded that some of the buildings deform beyond the limit of linearly elasticrnrange and due to the high damage of the main structural elements, the buildings will nornlonger give service or a total collapse will occur after earthquake. It is recommended tornevaluate seismic vulnerability of the existing buildings in Addis Ababa based on nonlinearrnanalysis procedures.rnKeywords: Seismic Vulnerability; Nonlinear Dynamic Analysis; Stiffness Degradation;rnStrength Decay; Pinching

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