This paper is an experimental study on the behavior of vertical shear link in the single and double configurations. There have been three specimens selected for examining the effects of different details .The first specimen was an I section with no stiffener, while the second specimen composed of I section with stiffeners designed according to AISC 2005. Third specimens were composed of two I s...

in this paper, the problem of layout optimization for x-bracing of steel frames is studied using the ant system (as). a new design method is employed to share the gravity and the lateral loads between the main frame and the bracings according to the requirements of the ibc2006 code. an algorithm is developed which is called optimum steel designer (osd). an optimization method based on an approx...

In this work, a tied braced frame (TBF) was developed to achieve uniform inelastic deformation in an eccentrically (EBF) by connecting links across the entire height with tie members. Herein, TBF design method is proposed, considering new lateral force distribution pattern. To better evaluate seismic performance, and verify advantages of TBF, nonlinear time-history analysis fragility were condu...

Although concentrically braced frame (CBF) systems enjoy high elastic stiffness and lateral strength, they show a low seismic energy absorption capacity. This dilemma is due to the buckling of CBFs’ diagonal members under compressive loading. To overcome shortcoming, researchers have proposed use dampers improve behavior CBF systems. Among dampers, metallic shear damper most popular thanks its ...