摘要
为了研究有无侧脚对木结构古建筑结构动力特性的影响,以某佛光殿为例,建立了有侧脚和无侧脚的2组有限元对比模型,分别对模型进行模态分析和响应谱分析,得到结构的前8阶自振周期和频率,以及结构的振动特点,在相同荷载作用下结构的最大位移、最大正应力值。研究结果表明:侧脚可有效延长结构的自振周期,减小结构在动力作用下的最大位移、最大正应力,结构承载力强度和稳定性都得到有效的增强。
The lateral foots have a special influence on the dynamic characteristics of Chinese historical timber buildings.To study this effect,the FEM models of structure with and without lateral foots were created with a Foguang palace as an example.The natural cycle and frequency of vibration,vibration characteristics of the first eight stages were obtained through modal analysis and response spectrum analysis.The maximum displacement and the maximum normal stress under the same load were also evaluated.The results showed that lateral foots can effectively increase the structural natural vibration cycle,and also appropriately decrease the maximum displacement and the maximum normal stress under the same dynamic loads,which indicates that lateral foots could enhance the strength and stability of structure.
出处
《中国科技论文》
CAS
北大核心
2016年第1期35-37,共3页
China Sciencepaper
基金
国家自然科学基金资助项目(51478004)
关键词
木结构
侧脚
有限元模型
模态分析
响应谱分析
结构自振
结构承载力
结构稳定性
timber structure
lateral foots
FEM models
modal analysis
response spectrum analysis
structure self-vibration
structural bearing capacity
structural stability
