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利用有限单元法对木屋架齿联结的剪切应力状态进行了分析,并经过模型试验验证。认为齿联结剪面上的剪切应力的实际分部长度是有限的,对单齿来说 l_j≈7h_c,对双齿来说 l_j″≈9h_c″。当 l_j≥4.5h_cl_j″≥(T/T″)4.5h_c″时,齿联结的抗剪承载能力为一定值。文中对木结构设计规范中的系数 k_j 进行了分析,认为现行规范之 k_j 偏大。
The finite element method was used to analyze the shear stress state of the trusses in wooden huts and verified by model tests. It is considered that the actual segment length of the shear stress on the teeth connecting the shear faces is limited, l_j≈7h_c for single teeth, and l_j“≈9h_c” for double teeth. When l_j ≥ 4.5h_cl_j′′≥(T/T′′) 4.5h_c′′, the shear capacity of the toothed joint is a certain value. The coefficient k_j in the wood structure design specification is analyzed in this paper. It is considered that the current specification of k_j is large. .