Seismic performance factors for timber buildings with woodframe shear walls

Estrella, Xavier; Guindos, Pablo; Almazán, José L.; Malek, Sardar; María, Hernán Santa; Montano, J. W.; Berwart, Sebastián

doi:10.1016/j.engstruct.2021.113185

Cited by 10 publications

(4 citation statements)

References 18 publications

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“…These differences may be explained by the fact that the predominant failure mode studied in [14] is an almost pure soft story, while in this research the triggered failure mode tends to be more complex. On the other hand, the mean acceleration demands required to achieve the inter-story drift of 2.5% are larger than the mean collapse capacity determined by Estrella et al [54]. The higher safety levels of the M3-D and M3-B models with respect to the findings of Estrella et al may be due to the fact that they performed the design using smaller seismic demands and simplified 2D models that disregard the additional capacity that the three-dimensional coupling and vertical load effects can provide.…”

Section: Casementioning

confidence: 60%

Numerical Analysis of the Seismic Performance of Light-Frame Timber Buildings Using a Detailed Model

et al. 2022

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Timber structures have gained interest for the construction of mid-rise buildings, but their seismic performance is still a matter under development. In this study, a numerical analysis of the seismic performance of light-frame timber buildings is developed through a highly detailed model using parallel computing tools. All of the lateral-load-resisting system components and connections are modeled. Combinations of lateral load capacity distributions in structures of one, three, and five stories are studied in order to assess the effects on the global performance of different triggered failure modes through nonlinear static and dynamic analyses. The results suggest that shear bracket connections and sheathing-to-framing connections control the buildings’ responses, as well as the failure mode. For a ductile response, the lateral displacement must be dominated by the in-plane wall distortion (racking); therefore, the system must be provided with a story shear sliding stiffness and load capacity at least twice that of the walls. Furthermore, based on the pushover capacity curves, the performance limits are proposed by evaluating the stiffness degradation. Finally, the effect of the mobilized failure mode on the structural fragility is analyzed. Even though standard desktop PCs are used in this research, significant reductions in the computation effort are achieved.

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Section: Casementioning

confidence: 60%

Numerical Analysis of the Seismic Performance of Light-Frame Timber Buildings Using a Detailed Model

et al. 2022

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“…To examine the evolutionary trends, the investigation also analyzed secant stiffness, dissipated energy, and equivalent viscous damping in terms of load cycle or drift level. Additionally, the secant stiffness and strength at 0.2% (K 0.2% , F 0.2% ) and 0.4% (K 0.4% , F 0.4% ) drift levels (i.e., design drift levels) of the SW assemblies were calculated to assess how the specimens behave when subjected to the current 42 and proposed 48 drift design demands for LFTBs according to the NCh433 42 guidelines. To assess the response of the T-shaped SW under the combined longitudinal and transverse response, we employed the Square Root of the Sum of Squares (SRSS) combination.…”

Section: Resultsmentioning

confidence: 99%

“…A linear elastic analysis under lateral loading of the building model presented in Figure 17 was conducted to explore the impacts of the experimental findings of this investigation. The building was designed in such a way that approximately 70% of the SWs are non‐planar, which is consistent with typical building archetypes for residential LFTBs 48 . Because LFTBs are relatively flexible compared to reinforced concrete wall buildings, a large number of SWs are commonly required, especially when the number of stories is 6 or greater.…”

Section: Resultsmentioning

confidence: 99%

“…The building was designed in such a way that approximately 70% of the SWs are non-planar, which is consistent with typical building archetypes for residential LFTBs. 48 Because LFTBs are relatively flexible compared to reinforced concrete wall buildings, a large number of SWs are commonly required, especially when the number of stories is 6 or greater. Therefore, most SWs are not planar (not isolated) but inevitably grouped in clusters of T-, L-, U-, and X-shaped assemblies.…”

Section: Potential Impact Of the Findings Of This Studymentioning

confidence: 99%

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System effects in T‐shaped timber shear walls: Effects of transverse walls, diaphragms, and axial loading

Valdivieso,

Almazán,

Lopez‐Garcia

et al. 2024

Earthq Engng Struct Dyn

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This paper investigates the effects of transverse shear walls (TSWs), out‐of‐plane bending stiffness of diaphragms (FDIA), and axial loading (AXL) on the lateral response of strong wood‐frame shear walls (SWs) used for multistory light frame timber buildings (LFTBs) located in highly active seismic zones. Experimental tests were conducted to understand the requirements for SW‐to‐TSW connections to achieve desirable TSW effects in non‐planar SWs and to characterize the lateral cyclic response of T‐shaped SW assemblies with and without diaphragms and axial load. Both slotted and screwed connections were evaluated as SW‐to‐TSW connections, and both showed sufficient stiffness and strength to achieve TSW effects. However, the slotted connection is preferred because it has a more ductile failure mode. Tests on T‐shaped SW assemblies with and without diaphragms and axial load revealed that TSWs significantly enhance the lateral stiffness and strength but reduce the deformation capacity with respect to that of planar SWs. FDIA and AXL effects further influence the stiffness and strength, overcoming the limitation of smaller deformation capacity in T‐shaped SWs without diaphragms. Diaphragms also make the T‐shaped SW response more symmetrical and improve the evolution of the secant stiffness, the cumulative dissipated energy, and the equivalent viscous damping over increasing levels of lateral drift. Numerical analyses of a theoretical building model with T‐shaped SWs show significant reductions in lateral drift (up to 46%) and uplift (up to 100%) compared to the case with planar SWs only, emphasizing the importance of considering system effects in the seismic design of LFTBs.

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A novel wood-based hybrid system for seismic performance increase of mid-rise building structures

Atashfaraz

Taiyari

Raad

et al. 2023

Bull Earthquake Eng

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Seismic performance factors for timber buildings with woodframe shear walls

Cited by 10 publications

References 18 publications

Numerical Analysis of the Seismic Performance of Light-Frame Timber Buildings Using a Detailed Model

Numerical Analysis of the Seismic Performance of Light-Frame Timber Buildings Using a Detailed Model

System effects in T‐shaped timber shear walls: Effects of transverse walls, diaphragms, and axial loading

A novel wood-based hybrid system for seismic performance increase of mid-rise building structures

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