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本文马尾松木构件抗弯强度和抗弯弹性模量的试验,采用8×10×230厘米大试样。在大试样未破坏部分,制取2×2×30厘米无疵小试样,进行对比试验。试验结果表明:一般节子愈大,降低马尾松木抗弯强度和抗弯弹性模量愈多。但是具体到每一试样,也有节子大,反而抗弯强度和抗弯弹性模量高的,这是因为还存在着试样结构致密的程度、晚材率的多少、应压木的有无以及无疵木材性质依照概率基本定律变化等因素的影响。试样上同一尺寸的节子对抗弯强度的影响大于抗弯弹性模量,这是因为抗弯强度受力大,受节子的影响也大;抗弯弹性模量受力小,受节子的影响也小。
In this paper, Masson pine components flexural strength and flexural modulus of elasticity test, using 8 × 10 × 230 cm large sample. In the unabashed part of the large sample, the preparation of 2 × 2 × 30 cm non-defective small sample, the comparative test. The experimental results show that the bigger the average knot is, the lower the bending strength and flexural modulus of masson pine are. However, specific to each sample, but also knot big, but the flexural strength and flexural modulus of elasticity is high, it is because there is still the degree of compact structure of the specimen, the rate of the late wood, there should be pressure wood No and no defect in the nature of the wood in accordance with the basic law of probability changes and other factors. The same size knot on the sample on the bending strength greater than the flexural modulus, this is because the bending strength of the force by the knot is also a large impact; flexural modulus of elasticity by the small The impact of children is also small.