Seismic protection technologies for timber structures: a review

Ugalde, David; Almazán, José L.; María, Hernán Santa; Guindos, Pablo

doi:10.1007/s00107-019-01389-9

Cited by 42 publications

(26 citation statements)

References 85 publications

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“…This offers the possibility of fully harnessing the dissipative potential of seismic dampers. In this context, energy dampers have been tested on wood-frame shear walls under different configurations (Ugalde et al 2019): Filiatrault (1990) and Li et al (2017) tested walls with frictional dissipators, Dinehart et al (1999) tested walls with viscoelastic dissipators, Higgins (2001) tested yield dissipators, and Symans et al (2002a) and Dutil and Symans (2004) investigated viscous fluid dampers using typical diagonal and chevron configurations, as shown in Figure 1. However, all previous applications of energy dissipators in wood-frame shear walls are based on the straight transmission of displacements from the wall to the dissipator.…”

Section: Brief Literature Review Of Seismic Protection Systems With Ementioning

confidence: 99%

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Development of an amplified added stiffening and damping system for wood-frame shear walls.

Montano

Maury

Almazán

et al. 2020

Lat. Am. j. solids struct.

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The effectiveness of seismic dampers to improve the lateral performance of timber structures may be heavily diminished if restrictive lateral drift limits as set by building codes, governs the design of the structure. This paper presents an innovative approach to improve the performance of seismic dampers installed in stiff wood-frame shear walls. U-Shape Flexural Plate dampers with a novel internal restraint system, were installed in a 4880x2475 mm wood-frame shear wall with an Eccentric Lever-Arm System which aimed at amplifying the displacements by transferring them from the shear wall to the dampers. Cyclic tests were conducted to four specimens. Initial test results showed that the presented amplifying system suffered concentrated losses of stiffness at some connections joints reducing its real efficiency. The loss of displacement transmission to dampers was retrofitted, and the results showed a great benefit in terms of resilience for the damped shear wall in contrast with unprotected ones. It was found that this approach provides a feasible solution to enhance the lateral performance of wood-frame structures.

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Section: Brief Literature Review Of Seismic Protection Systems With Ementioning

confidence: 99%

“…Some authors assumed that wood-frame walls dissipate much energy through the framing-to-sheathing connection. Therefore, no additional energy dissipation systems are considered necessary (Ugalde et al 2019). However, this idealized high energy dissipation is not real because of the pinching effect.…”

Section: Introductionmentioning

confidence: 99%

Development of an amplified added stiffening and damping system for wood-frame shear walls.

Montano

Maury

Almazán

et al. 2020

Lat. Am. j. solids struct.

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“…Recent advancement 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 timber (CLT) constructions (Ceccotti et al 2013;Van de Lindt et al 2018;Masaeli et al 2020;Chen et al 2020) are emerging.…”

Section: Introductionmentioning

confidence: 99%

Experimental seismic response of a resilient 3-storey post-tensioned timber framed building with dissipative braces

Cesare

Ponzo

Lamarucciola

et al. 2020

Bull Earthquake Eng

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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 spectra-compatible 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.

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“…The implementation of seismic protection systems, such as dissipative devices (Di Cesare and Mazza and Mazza, 2019) and/or rocking systems (Ponzo et al, 2012;Wang and Zhu, 2018), reduces seismic demand and/or increases the lateral capacity of structures, minimizing residual drift, and structural damage. It has been proved that timber structures have the capacity to withstand strong earthquakes without collapsing due to the light weight of wood material, elastic deformation capacity, and ductility of connections (Ugalde et al, 2019). Conventional wooden buildings are usually regular and the seismic resisting structures are shear walls with ductile foundation anchorages designed against the base shear force.…”

Section: Introductionmentioning

confidence: 99%

“…Usually, design values are suggested within the design code depending on structural types or governed by allowable material strain limits. Recently, the application of the DBD method has been extended toward the design of timber buildings (Ugalde et al, 2019), such as CLT shear walls (Di Cesare et al, 2019a), coupled timber walls (Newcombe et al, 2011), and post-tensioned timber frames without and with the addition of dissipative rocking systems (Newcombe et al, 2010;Di Cesare et al, 2012Pei et al, 2012). However, DBD applications to timber-framed buildings remain largely unexplored, and new techniques are still being investigated aiming to minimize residual damage induced by earthquakes.…”

Section: Introductionmentioning

confidence: 99%

Seismic Design and Testing of Post-tensioned Timber Buildings With Dissipative Bracing Systems

Ponzo

Cesare

Lamarucciola

et al. 2019

Front. Built Environ.

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This paper describes a seismic design procedure for low-damage buildings composed by post-tensioned timber framed structures coupled with hysteretic dissipative bracing systems. The main goal of the design procedure is preventing or limiting earthquake-induced damage to the structural and non-structural elements. For this aim, a target design displacement is defined according to the desired performance level. Then, the corresponding design force, strength, and stiffness of the post-tensioning and of the dissipative braces are evaluated in order to size post-tensioned connections and dissipating devices. The results of shaking table testing performed at the University of Basilicata are also reported. A prototype model −2/3 scaled, three-dimensional, and three stories with a post-tensioned timber structure without and with V-inverted braces and U-shaped flexural steel dampers-has been extensively tested. During testing, the specimen was subjected to a set of seven earthquakes at different intensity levels of the peak ground acceleration. The effectiveness of the bracing system and the reliability of the proposed procedure are experimentally demonstrated. Non-linear dynamic analyses have been performed in order to simulate the experimental seismic response. The numerical model is based on a lumped plasticity approach, which combines the use of elastic elements with linear and rotational springs representing energy dissipating devices and plastic rotations of the connections. The numerical results accurately predict the non-linear behavior of the prototype model, obtaining a satisfactory matching with the target drift considered for design.

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Seismic protection technologies for timber structures: a review

Cited by 42 publications

References 85 publications

Development of an amplified added stiffening and damping system for wood-frame shear walls.

Development of an amplified added stiffening and damping system for wood-frame shear walls.

Experimental seismic response of a resilient 3-storey post-tensioned timber framed building with dissipative braces

Seismic Design and Testing of Post-tensioned Timber Buildings With Dissipative Bracing Systems

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