竹质结构示范房顶梁柱的动刚度测量

依据结构动力学原理,采用瞬态振动激励试验法,对南京林业大学竹质结构抗震安居示范建筑中的一根顶梁柱结构系统进行频响函数和动刚度测量分析,并对其进行动态稳定性的安全性评价。结果表明:柱系统的动刚度大,其振动响应小,意味着该系统在单位力作用下产生的变形就小;柱的激励频率与其动刚度所对应的极大值频率相同时,其响应越小;顶梁柱结构符合木建筑房抗震设计的基本要求,对竹质结构建筑房屋的设计与应用具有借鉴意义。

Measurement and Analysis of Dynamic Stiffness of the Backbone System for Anti-Seismic Demonstration House with Bamboo-Based Structure

The frequency response function and the dynamic stiffness of the backbone pillar structure system of the aseismatic demonstration building with bamboo-based structure built by Nanjing Forestry University were measured and analyzed by transient vibration knock experimental method according to the principle of structure dynamics.The safety evaluation of the dynamic stability of the bamboo building was made.The conclusion of the experiment was that the dynamic stiffness of the pillar structure system was large with little vibrational response,which meant the system would be less deformed under the unit force.The vibrational response would be the least when the driving frequency of the pillar backbone was equal to the maximum frequency value of its dynamic stiffness.The results showed that the pillar backbone structure was in accordance with the fundamental demand of wood structure building design,which would provide the design and application of the building with bamboo-based structure with theoretical and practical reference.