【摘要】 把约束子结构模态综合法与直接模态摄动法相结合,建立复杂场地三维地震反应等效线性化分析计算方法。应用直接模态摄动原理,可简化各子结构模态分析过程,将特征值求解问题转化为线性代数方程组的求解,从而可有效提高计算效率。算例表明,该方法在提高大规模复杂场地地震反应分析计算效率方面优势明显。更多还原

【Abstract】 The equivalent linear computational analysis method based on combination of restrained mode synthesis method and direct modal perturbation solution for 3D seismic response analysis of complicated site soil is proposed.The application of the principle of direct modal perturbation has the advantages,i.e.,simplification of the mode analysis process of each substructures and transforming the solution of eigenvalue problem to the solution of nonlinear algebraic equation.Then the computational efficiency is improved effectively.Results of numerical examples show that the modified method can obviously increase computational efficiency of earthquake response analysis of the large-scale complicated site soil.更多还原