摘要
为了确保古建筑的抗震安全性,将隔震技术应用于古建筑。采用数值模拟方法研究了古建筑隔震,建立了非隔震和隔震两种古建筑有限元模型,进行了动力时程分析。通过输入不同频谱的RH4TG035波、TH2TG035波和TH4TG035波,对比分析了两种模型在地震作用下的位移、加速度时程曲线。结果表明:设置隔震层后,非隔震结构和隔震结构的振动形态不同,非隔震结构做下小上大的摆动型振动,隔震结构以隔震层为分界点,上部结构做整体型的刚体振动。与非隔震结构相比,隔震结构的相对位移和相对加速度时程反应较小,表明设置隔震层可以有效地减小地震响应,从而能够保护古建筑的抗震安全性。
In order to ensure the seismic safety of the ancient buildings,the seismic isolation technique was used in the ancient buildings. The seismic isolation of the ancient buildings was studied by numerical simulation method. Two finite element models of non-seismic isolation and seismic isolation respectively were established,and the dynamic time-history analysis was preceded. The displacement and acceleration time-history curves of both models were compared and analyzed by inputting different frequency spectrums of RH4TG035 wave,TH2TG035 wave and TH4TG035 wave. The results show that non-seismic isolation structure and seismic isolation structure are different in forms of vibration. The non-seismic isolation structure is swing vibration modes,while the seismic isolation structure features integral rigid body vibration of the upper structure upon the boundary of the seismic isolation layer. Compared with non-seismic isolation structure,the relative displacement and acceleration responses is smaller for seismic isolation structure,which indicates that the seismic isolation layer can effectively reduce the impact of earthquake to ensure the seismic safety of ancient buildings.
出处
《建筑结构》
CSCD
北大核心
2017年第17期71-75,共5页
Building Structure
基金
国家自然科学基金项目(51379142)
河北省教育厅青年基金项目(QN20131177)
河北省科技厅基金(15275802)
关键词
古建筑
隔震
抗震性能
有限元分析
ancient building
seismic isolation
seismic behavior
finite element analysis
