Browsing by Author "Veliz Sanzana, Fernando Daniel"

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    Case study: Seismic and gravitational design of 15-story office and residential building archetypes with a semirigid clt diaphragm and reinforced concrete shear walls in Chile
    (World Conference on Timber Engineering (WCTE), 2025) Barrios Pi, Sebastián Andres; Veliz Sanzana, Fernando Daniel; Berwart Astudillo, Sebastián Ignacio; Montaño Castañeda, Jairo Alonso; Araya Miranda, Raúl Eduardo; Lagos, Guzmán Jorge; Beltrán Beltrán, Martín Aleksei Ignacio; Chacón De La Cruz, Matías Fernando Nicolás; Valdivieso Cascante, Diego Nicolás; Guindos Bretones, Pablo; Almazan Campillay, José Luis; Santa María, Oyanedel Hernan
    This study is part of the "Ciudad Madera" technological consortium, which seeks to promote widespread wood construction in Chile, whose seismic code provides no guidance for cross-laminated-timber (CLT) seismic diaphragms. Currently, this lack of a design methodology for Hybrid Mass-Timber-Reinforced-Concrete (HMT-RC) buildings, has pushed a tendency for structural designers to solely rely on the concrete topping as the seismic horizontal diaphragm element. This study validates HMT - RC and develops a seismic-design method for buildings up to 15 stories high, with CLT floor system performing as the seismic diaphragm. Twenty monotonic/cyclic connector tests and six full-scale 4 m × 4 m Radiata-pine CLT diaphragm tests will calibrate nonlinear models of office and residential building archetypes, analyzed in a 72-case parametric matrix (height, seismic zone, soil class, design philosophy). Findings show: (i) RC-core and coupling-beam detailing governs drift, (ii) flooring size is controlled by a vibration criterion, and (iii) commercial timber column-to-column splices meet seismic inter-story rotation demands.
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    Full-scale lateral testing and modelling of industrialized timber diaphragms including only framing and non-structural sheathing
    (Taylor and Francis, 2023) Veliz Sanzana, Fernando Daniel; Estrella, Xavier; Guindos Bretones, Pablo
    © (2023) WORLD CONFERENCE ON TIMBER ENGINEERING 2023 (WCTE 2023) All rights reserved.Over the last decade, industrialized mid-rise light-frame timber buildings have gained popularity in Chile due to their structural, manufacturing, and environmental advantages. However, structural design aspects and industrialization prescriptions are not thoroughly addressed by national design codes, highlighting the need for developing standards to regulate industrialized earthquake-resistant timber systems. Therefore, this paper presents the outcomes of a large national project aimed at characterizing the lateral performance of a series of full-scale industrialized timber diaphragms employing Chilean materials. Eight 3.6x2.4 m specimens were tested under in-plane lateral load, considering different detailings such as sheathing, nailing, and framing. Besides, bare slabs (no sheathing) were also studied in the campaign. Strength results proved to be consistent with those proposed by international regulations, while chord tensions exceeded 30% of those obtained by principles of engineering mechanics. Additionally, it was found that adding gypsum boards over plywood does not considerably improve the global stiffness, although it considerably increased the in-plane strength. Finally, a finite-element numerical model was developed for the slabs studied in this campaign, proving to be capable of capturing the nonlinear behavior of the specimens under large lateral displacements.