木材横纹受压性能增强及数值模拟研究

[Objective]Wood is a typical anisotropic material with considerably lower transverse compressive strength than longitudinal compressive strength.In the field of wooden structure design and construction,the occurrence of tilting or even collapse due to transverse compression is a common challenge requiring careful consideration.Presently,reinforcement materials primarily include steel bars or screws,yet a comprehensive examination of internal force dynamics within reinforced wood is lacking.[Method]This study utilizes Japanese larch(Larix kaempferi(Lamb.)Carrière)as the timber material and enhances the material through the insertion of wood dowels to investigate the impact of the number and length of wood dowels on transverse compressive strength and modulus of elasticity.A simulation model is established using the finite element software to analyze stress and strain variations in samples following wood dowel implantation.The study investigates the predictive and simulated influence of wood dowel diameter on the transverse compressive strength and modulus of elasticity of wood.[Result]The analysis showed that the transverse compressive performance of wood increases with the increase in the length and number of wood dowels.The finite element simulation results showed that introducing wood dowels can influence the stress and strain distribution within the internal structure of wood,with increasing trends observed as the length of the dowel increases.However,when the length of the wood dowel is short,increasing the diameter has a limited impact on enhancing the transverse compressive strength and elastic modulus of the wood.However,when the length reaches 90 mm,altering the diameter effectively improves these properties.[Conclusion]The transverse compression performance of wood can be effectively improved by implanting wood dowels,and finite element numerical simulation provides a certain theoretical basis for the"planting tendon"technology.