Experimental seismic response of a resilient 3-storey post-tensioned timber framed building with dissipative braces
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Experimental seismic response of a resilient 3‑storey post‑tensioned timber framed building with dissipative braces Antonio Di Cesare1 · Felice Carlo Ponzo1 · Nicla Lamarucciola1 · Domenico Nigro1 Received: 9 July 2020 / Accepted: 26 September 2020 © The Author(s) 2020
Abstract With the increased number of multi-storey buildings in seismic areas, research efforts have been focused on developing earthquake resilient systems, such as low-damage techniques based on the combination of post-tensioning and dissipating devices. This paper describes the experimental study performed on a 3-storey post-tensioned timber framed (Pres-Lam) building equipped with energy dissipating systems. The testing project consisted of three phases adopting different configurations of the experimental model: (1) post-tensioning to beam-column joints only, (2) post-tensioning and dissipative rocking mechanisms and (3) post-tensioning and dissipative braces. The main objective of this paper is to experimentally investigate on the seismic response of a large-scale specimen with dissipative braces located in high seismic area, considering construction details similar to those adopted in practical applications. During the experimental campaign, the test frame was subjected to more than one hundred ground motions considering a set of seven spectracompatible earthquakes at increasing intensity levels. The dissipating bracing system with external replaceable hysteretic dampers improves the seismic resilience of multi-storey Pres-Lam buildings, showing inter-storey drift comparable to those with rocking walls, with full recentring capability and without structural damages or post-tensioning losses through seismic tests. Keywords Shaking table tests · Post-tensioned timber framed buildings · Seismic resilience · Dissipative braces · Hysteretic dampers
1 Introduction The traditional seismic design is based on structural ductility, generally causing the development of excessive displacements that might lead to structural and non-structural damage after moderate or severe earthquakes (Di Cesare et al. 2014a). Recent advancement
* Antonio Di Cesare [email protected] 1
School of Engineering, University of Basilicata, Potenza, Italy
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Vol.:(0123456789)
Bulletin of Earthquake Engineering
in earthquake engineering has led to the development of seismic resilient construction technologies that employ passive control systems to withstand strong earthquakes with limited structural damages (Ríos-García and Benavent-Climent 2020). A number of successful building projects utilizing mass-timber components is spreading in recent years thanks to their optimal strength-weight ratio, with important economic, social, environmental benefits and reduced construction time (Loss et al. 2018; Ugalde et al. 2019). Among the various structural low-damage solutions for medium and high-rise multistorey timber buildings located in high seismic risk area, moment-resistant timber frame (Polocoșer et al. 2018), platform frame or cross laminated timbe
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