Effective periods and dampings of building-foundation systems including seismic wave effects
Effective periods and dampings of building-foundation systems including seismic wave effects
复制标题
建筑基础系统的有效周期和阻尼，包括地震波效应
DOI：
10.1016/s0141-0296(01)00121-3
复制
发表时间：
2002
影响因子：
5.5
通讯作者：
M. Suárez
中科院分区：
文献类型：
--
作者：
J. Avilés;M. Suárez
确定了类似于实际用于解释惯性相互作用效应的精细化土-结构系统的有效周期和阻尼，包括垂直入射横波的重要特殊情况下的运动学相互作用效应。研究了弹性基岩上土体中单结构嵌套地基的三维轴对称模型。采用高效数值法和著名的井口平均法分别计算了基础的阻抗函数和输入运动。有效周期和阻尼是为大量的系统配置确定的。结果以无量纲图的形式呈现，可供设计人员在土-结构相互作用的代码分析中使用。图表也应用于初步分析，以评估所涉及的主要参数的影响。此外，还提出了有效周期和阻尼的精确近似公式，使用起来非常简单。
Effective periods and dampings of a refined soil-structure system similar to that used in practice to account for the inertial interaction effects are determined, including the kinematic interaction effects for the important special case of vertically incident shear waves. A three-dimensional axisymmetrical model consisting of a single structure with embedded foundation in a soil layer over elastic bedrock is examined. The impedance functions and the input motions for the foundation are computed respectively by an efficient numerical technique and the well-known Iguchi averaging method. Effective periods and dampings are determined for a large number of system configurations. Results are presented by means of dimensionless charts that should be used by designers in code-analyses of soil-structure interaction. Diagrams should also be of use in preliminary analyses to assess the influences of the principal parameters involved. Moreover, accurate approximate formulas for the effective period and damping are proposed, the use of which is very simple.