Deformation and cyclic buckling capacity of external replaceable hysteretic dampers for unbonded post-tensioned precast concrete walls Bedriñana, Luis Alberto es_PE Tani, Masonari es_PE Nishiyama, Minehiro es_PE 2024-05-30T23:13:38Z 2024-05-30T23:13:38Z 2021
dc.description The financial support of the Peruvian National Council of Science, Technology, and Technological Innovation (CONCYTEC/CIENCIACTIVA) for the doctoral studies of the first author at Kyoto University, where this research was conducted, is acknowledged.
dc.description.abstract This paper proposes and validates a type of external replaceable hysteretic dampers to be mainly applied to unbonded post-tensioned (UPT) precast walls. The main aim of the proposed damper was to provide the UPT walls with large energy dissipation without significant buckling. To evaluate the efficiency of these dampers, a cyclic test was conducted. The damper specimens consisted of a mild steel round bar with a reduced diameter over a fused length and an additional threaded length at each side, for installation purposes. Moreover, a round steel tube was installed over the fused length and filled with grout to delay the buckling. The proposed dampers, with different geometries and conditions, were subjected to cyclic loads to evaluate their deformation capacity and fracture mechanism. The specimens displayed a regular and stable hysteretic curve until strains of 9%, after which a flexural buckling was observed at the ends of the fused length. However, this flexural buckling did not affect the energy-dissipating capacity in any specimen. Consequently, this type of damper is considered suitable for applications in self-centering rocking walls. Furthermore, the proposed dampers fractured by a combination of low-cycle fatigue and excessive rotations at the transition length. In addition to the experimental validation, an extensive numerical investigation was conducted on the proposed damper to complement the experimental data and to provide analytical tools for design. © 2021 Elsevier Ltd
dc.description.sponsorship Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica - Concytec
dc.identifier.scopus 2-s2.0-85102151142
dc.language.iso eng
dc.publisher Elsevier Ltd
dc.relation.ispartof Engineering Structures
dc.rights info:eu-repo/semantics/openAccess
dc.subject Self-centering system
dc.subject Buckling es_PE
dc.subject Cyclic behavior es_PE
dc.subject Cyclic loading es_PE
dc.subject Energy dissipation es_PE
dc.subject Post-tensioning es_PE
dc.subject Precast prestressed concrete es_PE
dc.subject Seismic dampers es_PE
dc.title Deformation and cyclic buckling capacity of external replaceable hysteretic dampers for unbonded post-tensioned precast concrete walls
dc.type info:eu-repo/semantics/article