Page 2 - Open Access - November

TECHNICAL PAPER

Takeuchi et al. presented a practical application of both BRBs frames. The results of nonlinear dynamic analyses showed that
[14]
and an integrated façade for retrofitting an existing RC building, more than 60% of the total energy was dissipated by the braces
in order to increase both the seismic and thermal performance of frames at the collapse-prevention limit state. Cyclic tests
of the building simultaneously. It is observed that, when the conducted by Mahrenholtz et al. on RC frames retrofitted
[16]
maximum story drift exceeds the yield point of an existing RC with BRBs, directly connected through anchors, showed the
frame, all the structural elements including BRBs, lose their enhanced lateral strength and ductility to an adequate seismic
horizontal stiffness. As a result, risk of damage at a specific story performance level. Sutcu et al. proposed a seismic retrofit
[17]
and residual deformation after an earthquake is expected. Di design method for RC buildings using BRBs and steel frames.
[15]
Sarno and Manfredi conducted a numerical assessment of the Qu et al. performed cyclic tests on RC frames braced by
[18]
seismic performance of RC frame structures designed for gravity BRBs in double-K configuration. The braced RC frames were
loads only and retrofitted with BRBs placed along the perimeter only moderately damaged at 2% inter-story drift, while the BRB

(a)

(b) (c)
[6]
Figure 1: (a) Cross-sectional details of a typical BRB, (b) Hysteretic response of a BRB under cyclic loading , (c) Backbone curve of axial force (P)-
deformation (∆) response.

24 The IndIan ConCreTe Journal | november 2019