| 三种土层结构反应谱平台值的统计分析 |
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| 引用本文： | 薄景山,吴兆营,翟庆生,齐文浩.三种土层结构反应谱平台值的统计分析[J].地震工程与工程振动,2004,24(2):23-28. |
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| 作者姓名： | 薄景山 吴兆营 翟庆生 齐文浩 |
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| 作者单位： | 1. 中国地震局工程力学研究所,黑龙江,哈尔滨,150080
2. 中国地震局工程力学研究所,黑龙江,哈尔滨,150080;吉林省地震局,吉林,长春,130022 |
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| 基金项目： | 地震科学联合基金项目(104138) |
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| 摘 要： | 本文以建筑抗震设计规范规定的反应谱为目标谱，通过调整加速度峰值和特征周期来人工合成数百条加速度时程曲线，并将其作为土层地震反应分析的地震动输入。在若干有工程意义的场地剖面中，选取和构造了部分软弱土层分别在底部、中部和顶部的三种土层剖面，利用土层地震反应分析的一维等效线性化波动方法，计算了不同土层剖面在不同地震动输入下的地表加速度反应谱的平台值。在统计分析的基础上，给出了不同场地三种土层结构的反应谱平台值的平均值。通过与正常剖面的反应谱平台值比较，给出了三种土层结构的反应谱平台值的影响系数。本文的研究获得了一些有意义的成果。
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| 关 键 词： | 土层结构 地震动输入 反应谱平台值 影响系数 |
| 文章编号： | 1000-1301(2004)02-0023-06 |
Statistical analysis on flat section values of response spectra in three kinds of soil layer constructions |
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| BO Jing-shan.Statistical analysis on flat section values of response spectra in three kinds of soil layer constructions[J].Earthquake Engineering and Engineering Vibration,2004,24(2):23-28. |
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| Authors: | BO Jing-shan |
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| Institution: | BO Jing-shan~ |
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| Abstract: | Regarding the specified response spectra in the code for seismic design of buildings as target spectra, with the variation of PGA and T_g, more than hundred of acceleration histories were formed artificially. They will be used as the ground motion inputs in ground response analysis. In some practical site profiles, three kinds of soil layer profiles containing soft layers located at the bottom or in the mid of or on the top of them were selected or constructed. With the use of 1-D equivalent linearization wave motion method that is wildly used at present in site seismic response analysis, the flat section values of surface response spectrum for different profiles under different ground motion inputs were calculated. On the basis of statistical analysis, the average flat section values of response spectrum of three kinds of soil layer profiles were gained. Effect coefficients of the response spectra flat section values of three kinds of soil layer constructions were found by comparing the average values with those of the normal profiles. Some significant results were obtained. |
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| Keywords: | soil layer construction ground motion input response spectrum flat section value effect coefficient |
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