【摘要】 对有限计算域边界处理是边坡动力有限元计算的重要问题之一,利用有限元弹塑性动力分析方法,把边坡动力响应分析中边界条件设置概括为5种情况,输入3条实测地震波,研究边界条件设置和地震波特性对边坡位移响应、加速度响应以及频谱的影响。研究表明设置不同的边界条件及输入不同地震波,边坡动力响应结果有显著差异。研究结果有助于进一步揭示边坡在地震作用下的响应特性,为边坡的动力破坏机理研究和提高边坡稳定性分析评价的可靠性奠定基础。更多还原

【Abstract】 Boundary condition of a limited computing domain is a key problem of dynamic finite element calculation.Using the nonlinear dynamic finite element method,the seismic response behavior of a slope was investigated. The boundary conditions modeled in the dynamic analysis were summed up for five cases.The three actual seismic waves were inputted.The dynamic responses(displacement,acceleraction and frequency spectrum) of the slope were evaluated on the basis of different boundary conditions and seismic waves.It was shown that dynamic responses of the slope are significantly different.The study revealed the seismic response properties of the slope,and laid a foundation for analyzing slope failure mechanisms and improving reliability of slope stability analysis and evaluation.更多还原