Mechanical Performance of Plywood TIE Joints Under Tension and Shear in the WikiHouse Skylark Modular System

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Detalles Bibliográficos
Publicado en:	Materials vol. 18, no. 20 (2025), p. 4738-4755
Autor principal:	Sandoval Moisés
Otros Autores:	Cárdenas-Ramírez, Juan Pablo, Soto-Zúñiga, Paula, Arnett, Michael, Oñate Angelo, Leiva, Jorge, Cancino Rodrigo, Tuninetti Víctor
Publicado:	MDPI AG
Materias:	China Chile Mechanical properties Fire resistance Ductile-brittle transition Buildings Concrete Timber Housing Structural design Manufacturing Boundary conditions Energy consumption Ductility Plywood Composite materials Wood products Construction Shear tests Prefabricated buildings Timber construction Ductile fracture Modular systems Numerical models Failure modes Interfacial bonding Earthquakes Seismic engineering Modular structures Structural reliability Building codes Modular construction Flame retardants
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Descripción
Resumen:	The construction sector’s environmental footprint is driving the adoption of sustainable modular timber systems. The WikiHouse Skylark is a promising open-source model whose structural reliability depends on the performance of its critical plywood TIE joints. This study presents an experimental investigation of full-scale TIE joints fabricated from 18 mm Pinus radiata plywood in three variants: Standard (STD), Weather-Resistant (HR), and Fire-Resistant (FR). Monotonic tensile and shear tests were conducted to evaluate load–displacement behavior and failure modes. While the mean ultimate strengths varied between panel types, with HR highest in tension (7.7 kN) and FR highest in shear (8.2 kN), the most critical finding was the effect of the treatments on failure mode. The FR treatment induced a brittle fracture with significantly reduced ductility, in contrast to the more ductile tearing observed in STD and HR panels. This highlights a clear strength–ductility trade-off introduced by the fire-retardant treatment, a key consideration for structural design in modular timber construction. This dataset provides an essential empirical foundation for the numerical modeling and design guidelines of WikiHouse TIE joints, advancing the development of resilient and sustainable prefabricated housing.
ISSN:	1996-1944
DOI:	10.3390/ma18204738
Fuente:	Materials Science Database