ABSTRACT
The dynamic response of a steel building composed of single and multi-storey spans, often used for the Main Building of a conventional power station, was studied using the modal response spectrum analysis approach. The effects of irregularities inherent in these buildings due to mass, stiffness and storey height were investigated using the structural properties of a typical power station Main Building proportioned for gravity loads as well as seismic loads. The seismic response of the building was also calculated approximately using the seismic provisions of the Uniform Building Code and the results compared with the dynamic analysis. The base shear and overturning moment due to the elastic response spectrum approach were found to be within the Code’s static approach for most irregularities considered.
