Seismic Behaviour of Multistorey Steel Framed Tall Buildings Using Intentionally Eccentric Braces

Braces with intentional eccentricity (BIE) are recently proposed to improve the seismic behaviour of conventional buckling braces (CBBs) by inserting along brace length. Due this and resultant bending moment, BIE bends uniformly from small storey drifts moves smoothly into postbuckling under compression sustains trilinear tension. This delays appearance midlength local which causes unstable energy dissipation. BIEs have a desirable postyielding stiffness results in stable dissipation during cyclic loading capable dissipating low-intensity earthquakes. The structures for use buildings has not yet been investigated, specifically tall buildings. Therefore, study concentrates on investigating equipped that uses 3-dimensional (3D) finite element model ETABS. In first step, 20-storey structure is designed using both eccentric frame (EBF) system their performance TABAS earthquake record compared. second 25-storey irregular assessed evaluate efficiency structures. Results show capacity but it also shows large out-of-plane deformation some cases.