Assessment of Seismic Vulnerability of Reinforced Concrete Buildings
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Date
2011-04
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Addis Ababa University
Abstract
This thesis is conducted to evaluate seismic vulnerability and investigate nonlinear
behaviors of existing reinforced concrete buildings constructed in Addis Ababa. The paper
examines four structures using nonlinear dynamic analysis software (IDARC 2D ver. 7.0).
Each of these structures will be analyzed for three peak ground accelerations of 0.05g,
0.07g and 0.10g.
The finding of this research is that two of the four buildings will collapse immediately
when an earthquake (of intensity 0.05g, 0.07g and 0.10g) occurs. It is also found that the
other two buildings resist the seismic loads that will occur during an earthquake and the
story force deformation time history responses of these two buildings show stiffness
degradation, strength decay and pinching behaviors of reinforced concrete structures.
It was concluded that some of the buildings deform beyond the limit of linearly elastic
range and due to the high damage of the main structural elements, the buildings will no
longer give service or a total collapse will occur after earthquake. It is recommended to
evaluate seismic vulnerability of the existing buildings in Addis Ababa based on nonlinear
analysis procedures.
Keywords: Seismic Vulnerability; Nonlinear Dynamic Analysis; Stiffness Degradation;
Strength Decay; Pinching
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Keywords
Seismic Vulnerability; Nonlinear Dynamic Analysis; Stiffness Degradation; Strength Decay; Pinching