Browsing by Author "Navarrete, Benjamin"

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    Exterior wood-concrete slabs, experimentation and modeling of mechanical behavior. Part 2.
    (2015) Pena, Alvaro; Fuentes, Sebastian; Fournely, Eric; Navarrete, Benjamin; Pinto, Hernan
    Structural elements of composite materials are widely used as them allow conceiving stronger as well as economic structures. In the case of wood-concrete composite slabs, the high compressive strength of concrete, together with the great performance and behavior of wood under traction, allows to obtain a resistance, weight and stiffness effective structure; features widely proven in indoor environments. The objective of this research is to model the behavior of wood-concrete slabs at an outdoor environment conditions in order to study its usage in walkways. To achieve this goal, the behavior of the wood-concrete slabs will be conducted through the use of finite element models that are going to be validated with the experimental data previously obtained from tests performed in two composite slabs, which were subjected to diverse loading configurations for 1250 days in outdoor environment (Pena, Fuentes, Fournely, Navarrete, & Pinto, 2015). According to the results, it was possible to conclude that real moisture is greater than the theoretical one, which promotes the decay of wood, nevertheless, this variation did not produce a significant change in the overall mechanical characteristics of composite slabs; in the other hand, numerical modeling demonstrated the importance of the connection transverse stiffness, besides enabling the incorporation of wood moisture effect over its mechanical properties, allowing to quantify the effect of the connection stiffness.
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    The Adhesion Performance in Green-Glued Finger Joints Using Different Wood Ring Orientations
    (2024) Rodriguez-Grau, Gonzalo; Cordonnier, Pierre-Louis; Navarrete, Benjamin; Montero, Claudio; Alvarado, Claudia; Pommier, Regis; Rosales, Victor; Galarce, Carlos
    Structural lumber is designed to meet the technical standards that ensure safety, cost-effectiveness, and sustainability. However, some tree species face limitations in their growth, which restricts their widespread use. An example of this is Nothofagus alpina, which has excellent mechanical properties but is not utilized much due to the challenges in extracting its timber and poor utilization, mainly because of the length of the wood. There is little information concerned with the uses and better management of small pieces using Nothofagus species, but it is still insufficient. This study investigates the adhesion performance of green-glued finger joints with varying wood ring orientations and moisture contents ranging from 21% to 25% using Nothofagus alpina. The primary aim is to assess how ring orientation and wet timber affect the green gluing process for creating larger wood pieces than sawn wood. The resulting products could meet the standards for wood serviceability number three for native Chilean wood. The findings indicate that finger joint performance improves with higher timber moisture levels. However, the orientation of the wood fibers did not significantly affect the performance under the tested conditions. It is important to note that this effect may become more significant near the fiber saturation point. These findings emphasize the need for a detailed protocol on the green gluing technique for Nothofagus alpina and the associated drying and surface processes in finger joint construction.