Structural systems that aim at reducing structural damage by isolating plastic deformations in removable or "repairable" elements, and have the ability to return to the initial undeformed shape after an earthquake have received much attention recently. One of the solutions applicable to steel moment-resisting frames relies on post-tensioned beam to column joints [1] and column bases [2]. Other solutions having the same performance objectives use beam to column joints assembled with shape memory alloy connecting devices [3]. Vargas and Bruneau [4] investigated a design approach aiming to concentrate damage on removable and easy to repair structural elements ("structural fuses"), with the main structure designed to remain elastic or with minor inelastic deformations. A systematic procedure was proposed to design buildings with metallic structural fuses. Kiggins and Uang [5] showed that even if buckling restrained braced frames exhibit a favourable energydissipating mechanism, the low post-yield stiffness of the braces leave the system vulnerable to unfavourable behavioural characteristics such as large permanent drift. The potential benefit of using buckling-restrained braces in a dual system to minimize permanent deformations was investigated and shown to reduce significantly residual story drifts.
Experimental program for large-scale tests on a re-centring dual eccentrically braced frame / A., Stratan; A., Ioan; D., Dubina; F., Taucer; M., Poljanšek; J., Molina; P., Pegon; D'Aniello, Mario; Landolfo, Raffaele. - (2014), pp. 37-300-1-37-300-8. (Intervento presentato al convegno 7th European Conference on Steel and Composite Structures tenutosi a Napoli nel 10-12 settembre 2014).
Experimental program for large-scale tests on a re-centring dual eccentrically braced frame
D'ANIELLO, MARIO;LANDOLFO, RAFFAELE
2014
Abstract
Structural systems that aim at reducing structural damage by isolating plastic deformations in removable or "repairable" elements, and have the ability to return to the initial undeformed shape after an earthquake have received much attention recently. One of the solutions applicable to steel moment-resisting frames relies on post-tensioned beam to column joints [1] and column bases [2]. Other solutions having the same performance objectives use beam to column joints assembled with shape memory alloy connecting devices [3]. Vargas and Bruneau [4] investigated a design approach aiming to concentrate damage on removable and easy to repair structural elements ("structural fuses"), with the main structure designed to remain elastic or with minor inelastic deformations. A systematic procedure was proposed to design buildings with metallic structural fuses. Kiggins and Uang [5] showed that even if buckling restrained braced frames exhibit a favourable energydissipating mechanism, the low post-yield stiffness of the braces leave the system vulnerable to unfavourable behavioural characteristics such as large permanent drift. The potential benefit of using buckling-restrained braces in a dual system to minimize permanent deformations was investigated and shown to reduce significantly residual story drifts.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
