摘要
在土-结构的动力相互作用简化分析中,常采用双自由度集中参数模型简化土层。这种模型适合各向同性的单一土层,而实际工程场地的地基土多是各向异性的成层土层。为了将这一模型应用于此类土层,本文根据实际地震动记录,提出了一种变阻尼最小二乘反分析方法,可用来识别模型中的各个参数值。文中提出的方法具有适用范围广、计算精度较高的优点,并已通过编制FORTRAN程序加以实施和应用。
In analyses of soil structure interaction （SSI） , two-degrees-of-freedom lumped-parameters model is often used to simplify the soil. The model is only suitable to isotropic elastic soil, but the soil stratum in real engineering site is always layered and anisotropic one. In order to simplify the layered soil by this model, this article provides a variably damped least square method to identify the parameters by using the actual acceleration records. This method has obvious virtues such as wide range of application and high computation precision and can be used to handle practical soil-structure interaction problem. And the corresponding FORTRAN programming and exemplary analysis is carried out in this paper.
出处
《地震工程与工程振动》
CSCD
北大核心
2005年第4期135-140,共6页
Earthquake Engineering and Engineering Dynamics
