A survey of hysteresis energy distribution and lateral displacement in steel buildings with CCB brace at internal and external frames

Abstract

Purpose

The purpose of this paper is to study the method of hysteresis energy distribution and maximum relative lateral displacement in buildings’ stories, under the influence of scaled records for near-fault and far-fault earthquakes. The bracings in the considered buildings’ plan are distributed in two different ways: in the first case, the braces are added in external frames of the building, and in the second case, in the internal ones.

Design/methodology/approach

This research first selects some steel buildings with concentric braces and studies the seismic vulnerability of buildings under different earthquakes in accordance with the concepts of input and Hysteresis energy. In order to study the impact of braces’ distribution in the building’s plan, the buildings were modeled in this study in two ways. In the first way the braces were added to the building’s external frames and in the second way in its internal ones.

Findings

Results show that the need for far-fault scaled records’ displacement is more than the near ones and that the resultant relative lateral displacements in buildings with external braces are more than those with internal ones.

Originality/value

After these studies on the way of hysteresis energy distribution, it was shown that in case of buildings with internal braces, as the building’s height increases, the share of higher stories of the hysteresis energy rises. Also, it was illustrated that hysteresis energy distribution in buildings with internal braces is more uniform than those with external ones.

Citation

Faghihmaleki, H., Abdollahzadeh, G. and Esmaili, H. (2018), "A survey of hysteresis energy distribution and lateral displacement in steel buildings with CCB brace at internal and external frames", International Journal of Structural Integrity, Vol. 9 No. 1, pp. 38-49. https://doi.org/10.1108/IJSI-03-2017-0018