19 Result(s)
within
Ho** Kwon
Life Sciences
Characterization and Evaluation of Materials
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Article
Open AccessDevelo** structural sandwich panels for energy-efficient wall applications using laminated oil palm wood and rubberwood-based plywood/oriented strand board
In this work, a new type of structural sandwich panels made with laminated oil palm wood core and rubberwood-based oriented strand board (OSB)/plywood faces were introduced for energy-efficient wall applicatio...
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Article
Open AccessLateral resistance of mass timber shear wall connected by withdrawal-type connectors
In this study, the lateral resistances of mass timber shear walls were investigated for seismic design. The lateral resistances were predicted by kinematic models with mechanical properties of connectors, and ...
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Article
Open AccessPrediction of withdrawal resistance for a screw in hybrid cross-laminated timber
The aim of this study was to predict the withdrawal resistance of a screw in hybrid cross-laminated timber (CLT) composed of two types of lamina layers. A theoretical model to predict the withdrawal resistance...
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Article
Open AccessSensitivity of censored data analysis to determine the characteristic value of structural timber
In structural timber tests, unintended failure mechanisms occur frequently in specimens and their results are called censored data. There are two censored data analysis: censored maximum likelihood estimation ...
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Article
Open AccessMoment and shear capacity of Ply-lam composed with plywood and structural timber under out-of-plane bending
The aim of this study was to investigate the moment and shear capacity of Ply-lam which is composed with plywood and structural timber. The moment and shear capacity of Ply-lam were predicted by using predicti...
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Article
Stochastic model for predicting the bending strength of glued-laminated timber based on the knot area ratio and localized MOE in lamina
The aim of this study was to develop a stochastic model for predicting the bending strength distribution of glued-laminated timber (GLT). The developed model required the localized modulus of elasticity (MOE) ...
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Article
Shear behavior of cross-laminated timber wall consisting of small panels
A cross-laminated timber (CLT) wall plays the role of resisting shear stress induced by lateral forces as well as vertical load. Due to the press size, CLT panels have a limitation in size. To minimize the ini...
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Article
Improvement of robustness in ultrasonic attenuation spectroscopy for detecting internal insect damage in wood member of cultural heritage
Insect damage is one of the most serious problems in conservation of wooden cultural heritage buildings. Because this damage is quite small in a cross section, it is difficult to detect by conventional ultraso...
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Article
Prediction of compressive strength of cross-laminated timber panel
Compressive strength of cross-laminated timber (CLT) is one of the important mechanical properties which should be considered especially in design of mid-rise CLT building because it works to resist a vertical...
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Article
Yield analysis of Hem-Fir (N) lamina for Japanese visual and machine grade standards
The grade yields of Hem-Fir (N) (Tsuga heterophylla and Abies amabilis) laminas were compared for visual and machine grades based on the Japanese Agricultural Standard (JAS) for glued laminated timber. The main o...
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Article
Density calculation of wood by portable X-ray tube with consideration of penetrating depth
A portable X-ray apparatus generates soft X-rays which have a continuous wavelength (wide range). When using continuous wavelength X-rays, the mass attenuation coefficient of the soft X-rays is changed as the ...
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Article
Feasibility of ultrasonic spectral analysis for detecting insect damage in wooden cultural heritage
In cultural heritage, insect damage is one of the most serious damages, but conventional ultrasonic methods could not detect the early stage of insect damage because it is too small. In order to detect such sm...
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Article
Behavior of center-bored round timber beams in center-point bending test
Due to the lack of large cross-section wood, the concern regarding the utilization of small-diameter logs from forest thinning has increased as a worldwide issue recently. Round shape is advantageous to effici...
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Article
Influence of crossing-beam shoulder and wood species on moment-carrying capacity in a Korean traditional dovetail joint
This study investigated the interaction effects of a crossing beam on the moment-carrying capacity of a Korean traditional dovetail joint. In particular, the length of the crossing-beam shoulder (B ...
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Article
Mechanical bending-induced tension wood formation with reduced lignin biosynthesis in Liriodendron tulipifera
Mechanical bending treatment was employed to cause tension wood formation in the stem of the fast-growing yellow poplar. The tension wood induced by mechanical bending had many characteristic features of tensi...
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Article
Quantification of knots in dimension lumber using a single-pass X-ray radiation
The knot depth ratio (KDR) evaluation method was designed to quantitatively evaluate the amount of knot in dimension lumber by a single-pass X-ray radiation. To verify the proposed method, KDR values for 38-mm...
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Article
Saccharification of cellulose by dry pyrolysis
Pyrolysis of cellulose was studied for the purpose of practical production of 1,6-anhydro-β-D-glucopyranoside (levoglucosan, LG). To minimize secondary degradation of levoglucosan, two methods were examined: (1) ...
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Article
Prediction of bending properties for structural glulam using optimized distributions of knot characteristics and laminar MOE
This study established a prediction model for bending properties of glued-laminated timber (glulam) using optimized knot and modulus of elasticity (MOE) distributions of lumber laminate as the main input varia...
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Article
Manufacture and properties of high-performance oriented strand board composite using thin strands
Three-layered composite oriented strand boards were manufactured using very thin hinoki (Japanese cypress, Chamaecyparis obtusa Endl.) strands oriented in the faces and mixtures of sugi (Japanese cedar, Cryptomer...
