The implementation of a new friction tension-only “GripNGrab” device attached to rocking steel frame is described. device, when subject significant tension dissipates energy via sliding in the frictional component. When loaded compression direction, almost no compressive force carried, but displacement occurs ratchetting This absence any within dissipative system means that will always recentre...

The present study assesses the seismic performance of steel moment resisting frames (SMFs) retrofitted with different bracing systems. Two structural configurations were utilized: ordinary concentrically braces (OCBFs), buckling-restrained braces (BRBFs). A 7-story and 18-story steel perimeter SMFs were designed with insufficient lateral stiffness to satisfy code drift limitations in high seism...

In this work, a general method for the design of concentric braced steel frames (CBF) with active tension diagonal bracings, applicable to single- and multi-storey structures, is presented. The based on use an elastic modal analysis response spectrum, which carried out using appropriate modified stiffness bracings. reliability proposed validated through significant case studies, making series n...