Seismic Reliability of Existing RC Buildings with Short Columns

Abstract eng:
This paper deals with the problem of evaluating seismic reliability of existing RC frame structures including short elements. In the first part of the work a study of effectiveness of some models concerning evaluation of the shear capacity of RC short elements is developed, based on comparison with experimental data available in literature; this study has allowed to identify a model characterized by a good approximation in predicting the monotonic response of shear-critical elements. In the second part of the paper, the selected model has been used to evaluate the role of shear mechanisms in seismic response of sample frames representing structural configurations usual in the Italian building context. Performed analysis has shown that short elements induce a significant increase in vulnerability of the examined structures, particularly in the case of the sample frame characterized by a squat configuration, typical of industrial buildings.

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