Hybrid System of Unbonded Post-Tensioned CLT Panels and Light-Frame Wood Shear Walls

Ho, Tu X.; Dao, Thang N.; Aaleti, Sriram; Lindt, John van de; Rammer, Douglas R.

doi:10.1061/(asce)st.1943-541x.0001665

Cited by 39 publications

(6 citation statements)

References 18 publications

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“…The self-centring concept for walls with single or multiple segments has also been developed and applied in rocking timber shear walls [44][45][46][47][48][49]. The shear walls were mainly made of laminated Veneer Lumber (LVL) or glulam timber as the primary lateral load resisting system [50].…”

Section: Timber Post-tensioned Wallsmentioning

confidence: 99%

“…Many recently developed structural systems such as selfcentering PT timber walls do not have established seismic response factors [2]. Sarti et al [46] did an extensive parametric analysis to determine seismic performance factors for PT rocking timber shear walls according to FEMA P695 [22] procedure. The recommended seismic performance factors are as follows according to FEMA P695 [22]: Response modification factor, = 7.0; Displacement amplification factor, = 7.5; System overstrength factor, = 3.5.…”

Section: Dmentioning

confidence: 99%

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Behaviour of self-centring shear walls—A state of the art review

Javadi

Hassanli

Rahman

et al. 2023

Front. Struct. Civ. Eng.

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The application of unbonded post-tensioning (PT) in structural walls has led to the development of advanced self-centring (rocking) shear wall systems that has significant advantages, including accelerated construction due to the incorporation of prefabricated elements and segmental construction for different materials (e.g., concrete, masonry, and timber), reduced residual drifts, and little damage upon extreme seismic and wind loads. Concrete, masonry, and timber are often used for the construction of unbonded PT structural wall systems. Despite extensive research since the 1980s, there are no well-established design guidelines available on the shear wall configuration with the required energy dissipation system, joint’s locations and acceptance criteria for shear sliding, confinement, seismic performance factors, PT loss, PT force range and residual drifts of shear walls subjected to lateral loads. In this research a comprehensive state-of-the-art literature review was performed on self-centring shear wall system. An extensive study was carried out to collect a database of 100 concrete, masonry, and self-centring shear wall tests from the literature. The established database was then used to review shear walls’ configurations, material, and components to benchmark requirements applicable for design purposes. The behaviour of concrete, masonry and timber shear walls were compared and critically analysed. The general behaviour, force-displacement performance of the walls, ductility, and seismic response factors, were critically reviewed and analysed for different self-centring wall systems to understand the effect of different parameters including configurations of the walls, material used for construction of the wall (concrete, masonry, timber) and axial stress ratio. The outcome of this research can be used to better understand the behaviour of self-centring wall system in order to develop design guidelines for such walls.

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Section: Timber Post-tensioned Wallsmentioning

confidence: 99%

Section: Dmentioning

confidence: 99%

Behaviour of self-centring shear walls—A state of the art review

Javadi

Hassanli

Rahman

et al. 2023

Front. Struct. Civ. Eng.

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“…In response to this phenomenon, the idea of interposing prestressed tendons in CLT shear walls had been proposed [125,126], and due to the presence of prestressing, static friction was generated when the wallboard was in contact with the foundation surface to resist the horizontal load, which not only prevented the connection from premature failure but also improved the lateral performance of the CLT shear wall. Furthermore, the hybrid shear wall system, composed of a post-tensioned rocking CLT wall panel and conventional light-frame wood shear wall panels, was investigated [127][128][129][130][131]. In this case, the posttensioned CLT panels provided the self-centering capability, and the conventional light-frame timber shear wall system played an energy dissipation role.…”

Section: Influence Of Other Factors On Wall Performancementioning

confidence: 99%

Lateral Performance for Wood-Frame Shear Walls–A Critical Review

Wang¹,

Corbi²,

Mapesela³

et al. 2023

Journal of Renewable Materials

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Wood is a green material in line with the sustainable development strategy. From the excellent performance of engineering wood products, modern wood structures represented by light wood structures have gained more development opportunities. As an indispensable part of light wood structure systems, the wood-frame shear wall plays a vital role in the bearing capacity and earthquake resistance of light wood structure systems. This paper is focused on a review of the lateral performance of wood-frame shear walls and classifies the influencing factors in relevant experimental research into three categories, including internal factors such as shear wall structure, external factors such as test scheme, and other factors of material production and test process. Finally, the research prospects in this field were introduced based on the summary of the research status. This work can be a reference for further research on the lateral performance of wood-frame shear walls.

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“…Testing on post-tensioned beam-column joints with and without internal or external dissipative dampers showed that the systems were capable to sustain large drift demands with good re-centering capability and the addition of devices provided significant supplemental damping to the system (Palermo et al 2005;Smith et al 2014). Quasi static testing has been performed on Pres-Lam wall subassemblies, such as single LVL (Sarti et al 2015a) and CLT walls (Ho et al 2016) with elastoplastic dampers at the rocking interface, coupled walls with U-shaped flexural plates (UFP) dissipaters among them (Iqbal et al 2017), single and coupled CLT rocking walls with UFP dissipaters (Ganey et al 2017), coupled column-walls with UFPs (Sarti et al 2015b). All experimental results showed a complete re-centering capability of post-tensioned walls, demonstrating the effectiveness of the system with dissipative dampers in minimizing the uplift forces on the floor with limited damages to the system.…”

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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Hybrid System of Unbonded Post-Tensioned CLT Panels and Light-Frame Wood Shear Walls

Cited by 39 publications

References 18 publications

Behaviour of self-centring shear walls—A state of the art review

Behaviour of self-centring shear walls—A state of the art review

Lateral Performance for Wood-Frame Shear Walls–A Critical Review

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

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