Seismic design of self-centering viscous-hysteretic devices used for steel moment-resisting frames

Experimental investigation of a low‐prestressed self‐centering energy dissipative brace

“…To increase the resilience of buildings, various technologies have been developed with innovative features, such as self‐centering, 2–6 rocking, 7,8 , and replaceable components 9,10 . Among the self‐centering technologies, an attractive method is the introduction of a prestressing element into a conventional brace, such as a buckling‐restraint brace (BRB) or a friction brace, to provide a recentering capability 11–27 . Such self‐centering energy dissipative (SCED) braces are capable of controlling structural peak responses while nearly eliminating residual deformations, which significantly reduces structural repair costs and recovery time.…”

“…9,10 Among the self-centering technologies, an attractive method is the introduction of a prestressing element into a conventional brace, such as a buckling-restraint brace (BRB) or a friction brace, to provide a recentering capability. [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27] Such self-centering energy dissipative (SCED) braces are capable of controlling structural peak responses while nearly eliminating residual deformations, which significantly reduces structural repair costs and recovery time. In addition, these systems require few changes to the architecture of the structure.…”

“…More recent developments of the concept have concentrated on implementing various materials for the prestressing elements and the energy dissipative system, to achieve larger brace axial elongation and energy dissipative capacities. For the prestressing element, the use of aramid fiber, 11,12 E-glass fiber, 14,15 carbon fiber, 14 basalt fiber-reinforced polymer composite tendons, 16 shape-memory alloy rods, [17][18][19] Belleville springs, [20][21][22] and ring springs [23][24][25] have been investigated. For the energy dissipative system, the use of friction dampers 11,12,14,15,20,23 and metallic yielding elements [16][17][18] have been investigated.…”

“…For the energy dissipative system, the use of friction dampers 11,12,14,15,20,23 and metallic yielding elements [16][17][18] have been investigated. Several researchers also adopted viscous dampers 21,22,24,25 or viscoelastic dampers, 19 but these dampers face difficulties in providing the stable, large stiffnesses needed for a brace. Whatever prestressing and energy dissipative system materials are chosen, previously developed SCED braces need to have a large level of prestressing force to achieve full self-centering behaviors.…”