摘要
为找寻适合地裂缝场地的有限元人工边界,分别采用粘弹性边界、粘性边界及静力边界模拟了地裂缝场地土体,并与试验对应测点进行对比验证。粘弹性人工边界条件下,有限元模型测点的加速度时程曲线在峰值、峰值出现时刻及反应波形与试验测点较一致。加速度傅里叶谱在曲线形式、幅值大小及主频分布区域方面与试验测点也较一致。采用粘弹性边界的有限元模型能够在一定程度上表现地裂缝场地土的动力特性,为后续的地裂缝场地数值模拟分析提供参考。
To find the appropriate finite element artificial boundary of the ground fissure site, the viscoelastic boundary, the viscous boundary and the static boundary are adopted to simulate the ground fissure site, and results are compared with the corresponding test points. Under the viscoelastic artificial boundary condition, the acceleration time-history curve of the finite element model is consistent with the test point in the peak value, the peak time and the response waveform. The acceleration Fourier spectrum is also consistent with the test point in the form of curve, the size of the amplitude and the distribution area of the main frequency. The finite element model with viscoelastic boundary can show the dynamic characteristics of the ground fissure site to a certain extent, which provides reference for the subsequent numerical simulation of ground fissure site.
作者
刘臣
熊仲明
王丙锐
黄汉英
Liu Chen;Xiong Zhong-ming;Wang Bing-rui;Huang Han-ying(Shenzhen General Institute of Architectural Design and Research Co.,Ltd,Shenzhen 518031,China;Xi'an University of Architecture and Technology,Xi'an 710055,China)
出处
《工程抗震与加固改造》
北大核心
2018年第6期138-146,共9页
Earthquake Resistant Engineering and Retrofitting
关键词
人工边界
地裂缝场地
加速度时程
傅里叶谱
artificial boundary
ground fissure site
acceleration time-history
Fourier spectrum
