【摘要】 以中国西南地区穿斗式古建筑木结构中常见的直榫节点为研究对象,对其在低周往复荷载作用下的受力机理进行了详细分析,建立了考虑节点拔榫量影响的M-θ力学模型和相应的实现算法,并给出了简化计算公式,最后采用试验数据对该力学模型进行了验证。结果表明,直榫节点的M-θ力学模型的计算结果与试验曲线吻合良好,可为中国古建筑木结构的抗震性能及加固的研究提供理论基础。更多还原

【Abstract】 Straight-tenon joints in ancient timber structures in southwestern China using column and tie construction are studied. Their mechanical behavior under low-cycle reversed loading is analyzed in detail, and an M-θ mechanical model considering the effect of pull-tenon capacity of joints is proposed. Experimental data are employed to validate the new mechanical model, and it demonstrates that results from the proposed model are in good agreement with those from experiments. Hence, the proposed mechanical model will definitely play a role in theoretical analyses of the seismic performance and reinforcement of Chinese ancient timber structures.更多还原