| 层状地基土双自由度集总参数模型的参数识别 |
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| 引用本文： | 王满生,周锡元,HE Liu,胡聿贤. 层状地基土双自由度集总参数模型的参数识别[J]. 地震工程与工程振动, 2005, 25(4): 135-140 |
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| 作者姓名： | 王满生 周锡元 HE Liu 胡聿贤 |
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| 作者单位： | 中国地震局地球物理研究所,北京,100081;北京工业大学,抗震减灾研究所,北京,100081;School of Engineering, University of Alaska, 3211 Providence Drive, Anchorage, AK 99508 |
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| 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.
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| 关 键 词： | 双自由度集参数模型 成层土层 变阻尼最小二乘法 土-结构相互作用 |
| 文章编号： | 1000-1301（2005）04-0135-06 |
| 收稿时间： | 2004-08-03 |
| 修稿时间： | 2004-08-032004-11-24 |
Identification of parameters of 2-DOFs lumped-parameter model of layered-soil |
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| Wang Mansheng,Zhou Xiyuan,HE Liu,Hu Yuxian. Identification of parameters of 2-DOFs lumped-parameter model of layered-soil[J]. Earthquake Engineering and Engineering Vibration, 2005, 25(4): 135-140 |
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| Authors: | Wang Mansheng Zhou Xiyuan HE Liu Hu Yuxian |
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| Affiliation: | 1.Geophysics Institute, China Earthquake Adminisfration, Beijing 100081, China; 2. College of Architectural Engineering, Beijing Polytechnic University, Beijing 100081 ,China; 3. School of Engineering, University of Alaska, 3211 Providence Ave, Anchorage, AK 99508, USA |
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| Abstract: | 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. |
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| Keywords: | 2-DOFs lumped-parameters model layered-soil variably damped least square soil-structure interaction |
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