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古建筑木结构柱架的抗侧能力对整体结构的抗震性能有着重要的影响。通过对柱架受力机理进行分析,得出在水平反复荷载作用下柱架的受力变形以侧移为主,类似于“摇摆柱”;柱摇摆产生的埋置嵌入作用是柱架产生抵抗弯矩的根本原因;基于“摇摆柱”原理,并结合试验提出水平反复荷载作用下古建筑木结构柱架抗侧弯矩的理论计算公式,其计算结果与试验结果吻合良好;将试验与理论计算得出的M-θ骨架曲线进行拟合,分别得出了三组柱架的抗侧刚度公式。
The anti-side capacity of the ancient wooden column structure has an important impact on the seismic performance of the whole structure. Through the analysis of the mechanism of column stress, it is concluded that the force deformation of the column under horizontal repeated load is dominated by lateral displacement, which is similar to the “swinging column”. The embedded embedding effect of the column swinging is that of the column The theoretical calculation formula of the anti-bending moment of the ancient wooden column was proposed based on the theory of “swinging column” and combined with the test. The calculated results are in good agreement with the experimental results. The M-θ skeleton curves calculated by experiment and theory are fitted, and the formulas of the lateral stiffness of the three columns are obtained respectively.