摘要
通过数值模拟对土-输电塔在多维地震作用下的响应进行了研究。运用有限元软件ANSYS,建立土-输电塔相互作用体系有限元模型,根据相关理论设置粘弹性人工边界。结合土体性质,推导地震波反演公式,对Northbridge地表地震波进行反演,得到基底地震波。将地表地震波施加于刚性地基假定条件有限元模型,基底地震波施加于土-输电塔相互作用体系有限元模型,进行有限元数值计算并对比两者结果。结果显示,在刚性地基假定条件下,地震动摇摆分量对结构的位移和加速度地震响应影响已经非常明显。考虑土-输电塔相互作用后,相较于刚性地基假定,地震动摇摆分量对结构的影响会显著增大,从而可以得出,考虑土-输电塔相互作用,才能真实反映地震摇摆分量对结构地震响应的影响。
The response of soil-transmission tower under multi-dimensional earthquake was studied by numerical simulation in the paper.Applying a finite element software ANSYS,the finite element model of soil-transmission tower interaction system was established.According to relevant theories,the viscoelastic artificial boundary was set.Considering soil properties,we performed inversion of the Northbridge wave and obtained the basement seismic waves.The surface seismic wave was applied to the finite element model of the rigid foundation,and the base seismic wave was applied to the finite element model of the soil-transmission tower interaction system.Through the finite element numerical calculation and contrasting the two results,it shows that under the assumption of rigid foundation,seismic shaking pendulum component has an obvious effect on the displacement of structure and acceleration response.After considering the interaction between soil and structure,the influence of seismic oscillation on the structure will be significantly increased compared with that of rigid foundation.Consequently,it can be concluded that soil-transmission tower interaction must be taken into account to correctly reflect the impact of seismic swing component on structural seismic response.
作者
魏文晖
邓晨
黄玮松
WEI Wen-hui;DENG Chen;HUANG Wei-song(Hubei Key Lab of Road Bridge and Structure Engineering,Wuhan University of Technology,Wuhan 430070,China)
出处
《武汉理工大学学报》
CAS
北大核心
2018年第7期46-50,共5页
Journal of Wuhan University of Technology
基金
国家自然科学基金(51678462)
关键词
摇摆分量
振动台试验
有限元
土-输电塔相互作用
swing component
shaking table test
finite element
soil-transmission tower interaction
