Abstract:
This paper presents seismic evaluation of a typical low-rise reinforced concrete commercial building based
on the capacity spectrum method (CSM) recommended in ATC-40. A nonlinear three-dimensional finite element
(FE) model is developed for assessing the seismic capacity of the structure. To simulate a more realistic behavior of
the building during ground motions, effects of foundations, masonry infills, and other site-specific features are
integrated into the model. Seismic capacity of the structure is determined using pushover analysis and compared with
the demand imposed by predicted ground motions. Results indicate that this building possess the most undesirable
brittle failure with low level of seismic capacity. Further, this analysis method reveals several earthquake vulnerable
features and the effectiveness of 3D modeling of buildings with strength and stiffness irregularities. Finally, design
recommendations for eliminating earthquake vulnerable features are proposed. However, the typical details used at
the foundation-superstructure connection limits the structural system seismic capacity.
