Abstract:
The objectives of this study are twofold. The first objective is to evaluate the performance
of a reinforced concrete structure under seismic forces at the level expected for Bangkok area.
The second objective is to compare the analysis results from linear static, nonlinear static, linear
dynamic and nonlinear dynamic analyses. The analysis procedures used in this study were based
on those given in FEMA-273. A nine-story reinforced concrete frame originally not designed for
seismic forces was used as the study frame for this paper. The model of the frame was first
constructed. The analysis of linear static, nonlinear static, linear dynamic and nonlinear dynamic
were employed equivalent static forces, push-over, response spectrum and time history method,
respectively. The results indicated that the frame could be severely damaged under the level of
earthquake considered in this study. The underlying assumptions and limitations for the four
analysis methods are discussed in this paper. From result of the study, all analysis methods
indicated that beams at mid - levels of building experienced similar level of damage. However,
results for varied depending on the analysis method. Overall, the results indicate that linear
dynamic method is an effective method considering the time and effort required and its accuracy
when compared to the results from nonlinear dynamic analysis.