CAJ | 학술논문

为研究LVL木纤维复合材在高温中和高温后的抗弯性能，对104个试样进行了温度在20~225℃下的三点静态抗弯测试。研究结果表明，随着温度的升高，高温中和高温后的抗弯强度、抗弯弹性模量、延性系数均明显减小；相对于高温中的试样，高温后的抗弯强度和抗弯弹性模量均明显较高，而延性系数则较低。根据回归分析，提出了LVL在高温中和高温后的抗弯强度与温度的关系模型，该模型预测结果与实测值吻合良好。
위연구LVL목섬유복합재재고온중화고온후적항만성능，대104개시양진행료온도재20~225℃하적삼점정태항만측시。연구결과표명，수착온도적승고，고온중화고온후적항만강도、항만탄성모량、연성계수균명현감소；상대우고온중적시양，고온후적항만강도화항만탄성모량균명현교고，이연성계수칙교저。근거회귀분석，제출료LVL재고온중화고온후적항만강도여온도적관계모형，해모형예측결과여실측치문합량호。
Static 3-point bending tests,with a total of 104 specimens,were carried out to study the bending prop-erties of LVL wood composite at and after exposure to high temperature in the range from 20 to 225 ℃.The test results show that the bending strength (MOR),modulus of elasticity (MOE)and ductility coefficient (μ) of LVL wood composite at and after exposure to high temperature decrease with the increase of the temperature. However,except for theμ,both the MOR and MOE of LVL wood composite at exposure to high temperature are lower than that after exposure to high temperature.A statistical regression-based model,as a function of thermal exposure temperature,was developed and evaluated for predicted the strength loss of LVL wood com-posite.The predicted theoretical results were consistent with the observed values.