PSI - Issue 70

Milena Carolina Derlam et al. / Procedia Structural Integrity 70 (2025) 3–10

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stiffness. Increasing the screw spacing to 100 mm and 150 mm resulted in reductions in maximum load by 3.8% and 24.8%, increases in displacement by 55.5% and 58.8%, and decreases in elastic stiffness by 38.8% and 54.6%, respectively. These results highlight that reducing screw spacing enhances load-bearing capacity and stiffness while limiting lateral displacement, thereby improving structural performance, while also revealing that increasing connector spacing reduces energy transfer between the sheathing and frame, leading to lower stress levels in the OSB panels and a smaller effective tensioned area. It is recommended that screw spacing in LSF shear walls be minimized within practical and normative limits to improve structural performance. Closer spacing between screws — typically ranging from 75 mm to 100 mm — was shown to significantly improve stiffness, increase load capacity and delay critical failure mechanisms of the panel. Therefore, for applications requiring higher lateral resistance and structural integrity, the overall structural performance should be analyzed, incorporating a bracing wall system, always in accordance with design standards and construction tolerances. Additionally, the complex nonlinear interaction among connectors, material properties, contact behavior, and mesh configurations proved essential in achieving accurate computational modeling. Ultimately, these findings provide valuable insights for the development of national design standards and offer essential support to Brazilian engineers in the structural design of OSB-sheathed LSF systems. References American Institute Of Steel Construction. Seismic provisions for structural steel buildings. ANSI/AISC 341-16. Chicago, IL, 2016. Baran, E.; Alica, C. Behavior of cold-formed steel wall panels under monotonic horizontal loading. Journal of Constructional Steel Research, v. 79, p. 1-8, dez. 2012. Blais, C; Rogers, C.A. Testing and design of light gauge steel frame 9mm OSB panel shear walls. CFS Proceedings of International Specialty Conference on Cold- Formed Steel Structures (1971 - 2018). Orlando, Florida, USA, s. 8, v. 6, p. 1-27, out. 2006. Chen, Chuwei. Advantages and barriers of modular construction method in constructing buildings. Proceedings of the Institution of Civil Engineers Smart Infrastructure and Construction, v. 176, n. 2, p. 75-84, 2023. Federal Emergency Management Agency. Recommended seismic design criteria for new steel moment-frame buildings. FEMA 350. Washington, D.C., 2000. Kyprianou, C., et al. Numerical study of sheathed cold-formed steel columns. Ninth International Conference on Advances in Steel Structures (ICASS’2018), Hong Kong, China p. 5 -7, Dez. 2018. DOI: 10.18057/ICASS2018. p. 90. Kyvelou, P.; Gardner, L.; Nethrcot, D.A. Testing and analysis of composite cold-formed steel and wood-based flooring systems. Journal of Structural Engineering, UK, v. 143, nº. 11, 40 p. nov. 2017. DOI: 10.1061/(ASCE)ST.1943-541X.0001885. Lange, J.; Naujoks, B. Behaviour of cold-formed steel shear walls under horizontal and vertical loads, Thin-Walled Structures, v. 44, no 12, p. 1214 – 1222, dez. 2006. Niari, Shirin Esmaeili; Rafezy, Behzad; Abedi, Karim. Seismic behavior of steel sheathed cold-formed steel shear wall: experimental investigation and numerical modeling. Thin-Walled Structures, v. 96, p. 337-347, 2015. Oliveira, U. L.; Correia, L. S. O estudo dos métodos Construtivos Light Steel Frame. In: ENDICS – Encontro Distrital do CREA-JR/DF e SENGE Jovem/DF, 2022, Distrito Federal. Electronic proceedings [...]. Distrito Federal: CREA-DF, 2022. Papargyriou, I; et al. Cold-formed steel beam-to-column bolted connections for seismic applications. Revista Thin-Walled Structures, v. 172. Mar. 2022. DOI: 108876. Plotdigitizer. PlotDigitizer. Available at: https://plotdigitizer.com/app. Rosa, N. C. F. Study of Structural and Thermal Performance of Light weight Steel Framing (LSF) Modular Construction. Tese (PhD thesis in Steel and Composite Construction) - Faculty of Sciences and Tecnology University of Coimbra, Coimbra, 2018. Schafer, Benjamin W.; Peköz, Teoman. Computational modeling of cold-formed steel: characterizing geometric imperfections and residual stresses. Journal of constructional steel research, v. 47, n. 3, p. 193-210, 1998. Simpson Strong-Tie Company, Inc. Catálago técnico: Connectors for Cold-Formed Steel Construction S/HDS and S/HDB Holdowns. Pleasanton, CA: Simpson Strong-Tie, 2023. 194-195 p. Simpson Strong-Tie Company, Inc. Catálago técnico: Simpon Strong-Tie S/HDS Holdowns. Pleasanton, CA: Simpson Strong-Tie, 2023. 1 p. Simulia. Programas. ABAQUS CAE. Disponível em: https://www.3ds.com/products/simulia/abaqus. Acesso em: 20 mar. 2024. Simulia. Abaqus CAE: User’s Manual. Yilmaz, F. et al. Behaviour and performance of OSB-sheathed cold-formed steel stud wall. Thin-Walled Structures, v. 183, fev. 2023. DOI: 10.1016/j.tws.2022.110419. XIE, Zhiqiang et al. Experimental investigation of strengthened screw connection and application in CFS shear walls. Journal of Constructional Steel Research , [S.l.], v. 168, p. 105870, 2020. XIE, Zhiqiang et al. Finite Element Investigation of a Novel Cold-Formed Steel Shear Wall. Buildings, v. 14, n. 6, p. 1691, 2024.