Concentrically braced frame (CBF) systems are susceptible to buckling (which causes a decrease in energy absorption), although this system has considerable lateral stiffness and strength. To over shortcoming, researchers have suggested the use of I-shaped steel dampers as practical idea that prevents increases absorption but reduces system. increase damper, thickness web or flange can be increa...

Received: November 02, 2017 Revised: January 12, 2018 Accepted: January 17, 2018 Abstract: Introduction: Retrofit interventions are often performed by introducing in structures dissipative devices able to improve the global seismic response particularly in terms of energy dissipation capacity. In the case of Concentric Braced Steel Frames (CBF), these devices are generally introduced in the for...

This paper presents a method for computing a minimal bounding ellipsoid that contains the solution set to the uncertain linear equations. Particularly, we aim at finding a bounding ellipsoid for static response of structures, where both external forces and elastic moduli of members are assumed to be imprecisely known and bounded. By using the Slemma, we formulate a semidefinite programming (SDP...

This paper presents a method for computing a minimal bound that contains the solution set to the uncertain linear equations. Particularly, we aim at finding a bounding ellipsoid for static response of structures, where both external forces and elastic moduli of members are assumed to be imprecisely known and bounded. By using the S-lemma, we formulate a semidefinite programming (SDP) problem wh...

Abstract Tall buildings have unique seismic challenges, particularly the P-delta effect. This can cause an increase in loads on certain parts of structure, leading to potential instability or collapse. The solution is use buckling restrained bracing (BRB) systems, which improve lateral strength structure and control present study aimed determine effectiveness various brace configurations reduci...