Experimental study of the effects of continuous rod hold-down anchorages on the cyclic response of wood frame shear walls

Estrella, Xavier; Malek, Sardar; Almazán, José L.; Guindos, Pablo; María, Hernán Santa

doi:10.1016/j.engstruct.2020.111641

Cited by 21 publications

(28 citation statements)

References 20 publications

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“…However, this procedure solely considered the uplift strength and stiffness of wood-frame TSWs, disregarding the outof-plane strength and stiffness. Hence, additional experimental investigations remain necessary, particularly on strong wood-frame SWs 25,29,30 that are crucial for multistory LFTBs. The term "strong wood-frame SW" was coined by Estrella et al 25,29 to describe SWs designed for mid-rise buildings in highly seismic areas, distinct from conventional SWs typically found in low-rise structures in the United States.…”

Section: Previous Research On the Influence Of Tswsmentioning

confidence: 99%

“…Hence, additional experimental investigations remain necessary, particularly on strong wood-frame SWs 25,29,30 that are crucial for multistory LFTBs. The term "strong wood-frame SW" was coined by Estrella et al 25,29 to describe SWs designed for mid-rise buildings in highly seismic areas, distinct from conventional SWs typically found in low-rise structures in the United States. Strong SWs feature four or more 2 × 8 framing members as end studs, strong hold-downs, wood structural panels (often OSB) on both sides and dense (e.g., 50 mm) nailing patterns for edges and fields.…”

Section: Previous Research On the Influence Of Tswsmentioning

confidence: 99%

“…Strong SWs feature four or more 2 × 8 framing members as end studs, strong hold-downs, wood structural panels (often OSB) on both sides and dense (e.g., 50 mm) nailing patterns for edges and fields. Conversely, conventional SWs, as defined by Estrella et al, 25,29 consist of double-end studs, conventional hold-downs, wood structural panels on one side, and nails spaced 150 and 300 mm on center at the edges and fields. Apart from kinematics that are different from that of conventional SWs, strong SWs also tend to be subjected to greater axial loading, 25,29,30 and are, therefore, more susceptible to potential influences of axial loading.…”

Section: Previous Research On the Influence Of Tswsmentioning

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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Section: Previous Research On the Influence Of Tswsmentioning

confidence: 99%

Section: Previous Research On the Influence Of Tswsmentioning

confidence: 99%

Section: Previous Research On the Influence Of Tswsmentioning

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

Self Cite

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“…Due to the gradual enlargement of the fastener hole in the framing material when the joints are subjected to cyclic loading, the hysteretic curves of the joints have a horizontal section at the beginning of the loading. Moreover, the hysteresis curve of joints presents an obvious 'Z' shape, which indicates that the cyclic performance of the joint is influenced by the slip [5,37].…”

Section: Load-displacement Relationshipsmentioning

confidence: 99%

Experimental and Reliability-Based Investigation on Sheathing-to-Framing Joints under Monotonic and Cyclic Loads

Di¹,

Zuo²

2021

Forests

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The seismic performance of a light wood frame structure is determined by sheathing-to-framing joints. In order to encourage the use of more sustainable materials in structures, the spruce-pine-fir (SPF) panel and the bamboo scrimber (BS) panel were considered as sheathing materials. Monotonic and cyclic tests were conducted on the joints with different parameters to obtain their mechanical properties. Moreover, the design value of the bearing capacity of sheathing-to-framing joints was calculated and compared in accordance with Chinese code (GB50005) and European code (Eurocode 5). Based on the test results and the design codes, the reliability index of the design value of the bearing capacity of joints was calculated using the first-order reliability method (FORM). Results demonstrate that the joints have high bearing capacity and stiffness at initial loading stage when the loading direction is perpendicular to the framing grain. BS panels make better use of the bending strength of fasteners than SPF panels. The screwed joints have lower strength and stiffness degradation than nailed joints, but the nailed joints show better ductile and dissipation than screwed joints. In addition, the reliability indexes of design bearing capacity calculated by the Chinese code of joints under monotonic load are conservative, but those of joints under cyclic load are unconservative. Therefore, in order to ensure the safety and economy of design, a modification factor for the GB50005 design method of joints is proposed to meet the target reliability index.

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“…O preenchimento das paredes é feito com placas de OSB, e entre elas estão todas as instalações necessárias para a utilização da edificação (hidrossanitária, elétrica, de gás etc.) Edifícios construídos com o sistema wood frame têm ganhado cada vez mais espaço no setor da construção, devido ao seu rápido e fácil processo de fabricação e montagem fora do local da obra (Figura 2) (ESTRELLA et al, 2021).…”

Section: Wood Frameunclassified

Levantamento de soluções construtivas em madeira industrializada

Lopes

Carmo

Serra

2021

Xii Simpósio Brasileiro De Gestão E Economia Da Construção

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Devido à competitividade das empresas e a implantação de novas técnicas de gestão da indústria 4.0, a indústria da construção busca a implantação de novas soluções tecnológicas e procedimentos mais sustentáveis, social, ambiental e economicamente. Assim, as soluções tecnológicas em madeira ganham cada vez mais espaço e atraem um olhar otimista para o futuro. O alto índice de qualidade dos elementos de madeira pré-fabricados gera uma descentralização dos canteiros de obra, concentrando neles apenas a montagem das estruturas, e colaborando para a disseminação da construção off-site. Obtém-se uma redução de perdas, de mão-de-obra, de tempo de execução e, consequentemente, diminuição dos custos totais de obra. Logo, para sistematização das soluções existentes no mercado brasileiro, este trabalho teve por objetivo diagnosticar o atual cenário das construções em madeira no Brasil, a fim de identificar as soluções tecnológicas atuais. A metodologia empregada foi a de análise documental, por meio de pesquisa bibliográfica e, em seguida, foram identificadas as empresas que trabalham com os sistemas construtivos estudados. Pode-se concluir que, a madeira começa a recuperar a notoriedade de outros tempos, apoiada nas crescentes preocupações ambientais, nos avanços tecnológicos e nos estudos de suas características.

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Experimental study of the effects of continuous rod hold-down anchorages on the cyclic response of wood frame shear walls

Cited by 21 publications

References 20 publications

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

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

Experimental and Reliability-Based Investigation on Sheathing-to-Framing Joints under Monotonic and Cyclic Loads

Levantamento de soluções construtivas em madeira industrializada

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