Citas bibligráficas
Cajahuamán, R., (2018). Determinación de valores admisibles para el diseño estructural especies Shihuahuaco y Huayruro con madera seca [Tesis, Universidad Nacional de Ingeniería]. http://hdl.handle.net/20.500.14076/17124
Cajahuamán, R., Determinación de valores admisibles para el diseño estructural especies Shihuahuaco y Huayruro con madera seca [Tesis]. : Universidad Nacional de Ingeniería; 2018. http://hdl.handle.net/20.500.14076/17124
@misc{sunedu/3501974,
title = "Determinación de valores admisibles para el diseño estructural especies Shihuahuaco y Huayruro con madera seca",
author = "Cajahuamán Paucar, Richard Luis",
publisher = "Universidad Nacional de Ingeniería",
year = "2018"
}
Bearing in mind that the structural design and construction with wood is established in the E.010 standard, which indicates values of allowable stresses and modulus of elasticity based on studies with green wood, and indicates that they can be used in designs with dry wood, thus underestimating its resistance. Therefore, in this research the mechanical properties of dry wood samples of the Shihuahuaco and Huayruro species were studied. The tests performed were axial compression and static flexure, following the procedures established in the Peruvian technical standards NTP 251.014 and NTP 251.017 respectively. These tests were carried out in the materials testing laboratory (LEM), located in the FIC-UNI. The wood specimens were obtained from 4 different suppliers in the city of Lima, in order to have samples from different trees, then proceeding with the botanical identification and the subsequent drying of the specimens in the open air. The moisture content at the time of the test of each test piece was between a minimum of 10.7% and a maximum of 16.5%, so it was decided to adjust the results to a standard moisture content of 12% which is a value representing dry wood according to JUNAC (1984). The adjustment procedure and the considerations taken are based on the ASTM D1990 standard. With the results obtained from the adjustment the allowable stresses in axial compression and static flexure were determined, as well as the modulus of elasticity. These values were compared with those indicated in the E.010 standard that resulted from wood tests in wet conditions. Giving as conclusion that the values of wood in dry state are greater than those of the green state. When applying these results to the design of beams it was demonstrated that the design with dry wood demands less material than the design with green wood, therefore it represents a lower cost in the materials.
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