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主要研究了杨木旋切板胶合木(LVL)受弯构件的结构性能,建立了受弯构件的计算模型。通过试验,探讨了材料的部分物理力学性能,分析了受弯构件的破坏形态与破坏机理,并将其受弯性能与建筑中常用的锯材构件作了对比分析。试验结果表明,LVL梁的结构性能大大超出了锯材构件,其不仅具有较高的强度与刚度,还具有较低的强度变异性;分析了旋切板厚度与荷载作用方向对构件结构性能的影响;验证了平截面假定。利用极限应变法对构件的弯曲性能进行了理论分析,其结果与试验结果吻合良好。
Mainly studied the structural properties of LVL bent members, and established the calculation model of flexural members. Some physical and mechanical properties of the material were discussed through experiments. The failure modes and failure mechanism of the bent members were analyzed. The flexural properties of the bent members were compared with those of the common sawn timber members. The experimental results show that the structural performance of LVL beams is much higher than that of sawn timber components, which not only has high strength and stiffness, but also has lower strength variability. The effects of rotational thickness and load direction on structural properties Influence; verify the cross-section assumption. The bending behavior of the member is analyzed theoretically by using the ultimate strain method. The results are in good agreement with the experimental results.