Comparative study on seismic performance of specially shaped RC columns with that of rectangular columns in high-rise structures

Abstract

Purpose

Columns are structural elements that are predominantly subjected to compressive forces and moments that are to be transferred from the super-structure to the sub-structure. The geometrical shape of a column is a significant factor to be considered. The paper aims to discuss this issue.

Design/methodology/approach

Pushover analysis is carried out, to study the behavior of RC frames with rectangular and specially shaped columns for the same building layout.

Findings

Reduction of 27.3 percent in base shear, 67.4 percent in spectral displacement, 66.5 percent reduction in storey displacement, 70.22 percent in storey drift and 0.315 percent reduction in storey shear is observed.

Practical implications

Special shaped RC columns can effectively enhance the structural behavior of high rise structures under seismic excitation in comparison to those with regular shaped RC columns.

Originality/value

Applications of special shaped columns in structures have showed a great deal of reduction in displacement and shear forces developed due to seismic activity, for the same area of concrete and steel as in rectangular columns.

Citation

Shetty, S., R.M., S., Bhandary, S. and Shetty, T. (2020), "Comparative study on seismic performance of specially shaped RC columns with that of rectangular columns in high-rise structures", International Journal of Structural Integrity, Vol. 11 No. 2, pp. 202-215. https://doi.org/10.1108/IJSI-03-2019-0027