Accurately predicting the structure’s response under external loads is a prerequisite for scientific protection of traditional timber structures. Wooden columns are the key components for transmitting the vertical loads and resisting the lateral loads in traditional timber structures. The dynamic response characteristics of wooden columns eccentrically overlain by top column component under horizontal earthquakes are investigated in this paper. The critical triggering conditions for different phases of the dynamic response are derived. The factors that determine the transition between various phases of the dynamic response are obtained. Based on the trigger conditions, the trigger sensitivity of each phase of the dynamic responses is studied. The results show that there are four phases of dynamic response that can be triggered on the wooden column, i.e. the static, uplift, uplift followed by slipping, and simultaneous uplift and slipping. Uplift is most likely to be triggered. Uplift with rocking is the main form of wooden columns. The results of theoretical analysis are verified by numerical simulation. This study provides the necessary theoretical basis for the phase assessment and protection of the traditional timber structures.

中文翻译：

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水平地震作用下传统木结构木柱的动力响应

准确预测结构在外荷载作用下的响应是对传统木结构进行科学保护的前提。木柱是传统木结构中传递竖向荷载和抵抗侧向荷载的关键部件。研究了水平地震作用下顶柱构件偏心叠置的木柱的动力响应特性。推导了动态响应不同阶段的临界触发条件。获得了决定动态响应各阶段之间过渡的因素。基于触发条件，研究了动态响应各相的触发灵敏度。结果表明，在木柱上可以触发四个阶段的动态响应，即静止、隆起、隆起后滑移、同时隆起和滑移。上升最有可能被触发。摇摆式隆起是木柱的主要形式。通过数值模拟验证了理论分析的结果。本研究为传统木结构的阶段性评价和保护提供了必要的理论依据。