【摘要】 通过自编子程序实现粘弹性边界及二阶透射边界的施加及相应的地震动输入,并内置于大型通用有限元分析软件系统中,采用隐式积分算法进行动力分析,以实现无条件稳定的地震反应时域分析。算例精度和准确度验证了该程序的有效性,将其应用于大型地下厂房洞室群的地震反应计算,给出了洞室不同位置的应力、位移和加速度的幅值分布及时程变化曲线,为深入了解地震作用下洞室群的动力反应特点提供了参考。更多还原

【Abstract】 Using implicit integration scheme to analyze the dynamic properties,the codes for applying the multi-order transmission boundary and viscoelasticity boundary with the corresponding seismic input are programmed and embedded into the general finite element analysis software system to realize unconditional stable time domain analysis of seismic response.A numerical example is presented to verify the precision and reliability of the proposed method.Finally,the seismic response calculation of the large-scale underground powerhouse chambers of hydropower station is taken as an example.Variation curves of powerhouse and amplitudes distribution of stress,displacement and acceleration in different position of chambers are presented,which gives reference to gain the dynamic characteristics of underground chambers with the seismic action.更多还原