| 设计谱长周期段取值与能量特征研究 |
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| 引用本文： | 王德才, 倪四道, 叶献国. 设计谱长周期段取值与能量特征研究[J]. 工程力学, 2016, 33(1): 105-111. DOI: 10.6052/j.issn.1000-4750.2013.03.0202 |
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| 作者姓名： | 王德才 倪四道 叶献国 |
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| 作者单位： | 1.合肥工业大学建筑与艺术学院, 安徽, 合肥 230601;;2.中国科学院测量与地球物理研究所, 湖北, 武汉 430077;;3.合肥工业大学土木与水利工程学院, 安徽, 合肥 230009 |
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| 基金项目： | 国家自然科学基金项目(51378167,51278519) |
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| 摘 要： | 基于由随机振动理论得到的功率谱密度与加速度反应谱之间的关系,以及由傅里叶幅值谱精确计算输入能量反应谱方法,提出了建立与设计加速度反应谱匹配的输入能量谱方法。计算了与《建筑抗震设计规范》(GB50011-2010)设计反应谱匹配的输入能量谱,通过与实际强震记录输入能量谱特征对比,对设计反应谱长周期段输入能量特征进行了分析。结果表明,由于规范设计谱长周期段取值比较保守,在长周期段输入能量随着周期变长逐渐增加,与实际地震动记录输入能量谱长周期特征明显不同。根据实际强震记录输入能量谱特征,给出了设计反应谱长周期直线下降段的取值建议。
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| 关 键 词： | 功率谱密度 输入能量 长周期 随机振动 设计反应谱 |
| 收稿时间： | 2013-03-13 |
| 修稿时间： | 2015-10-08 |
STUDY ON VALUE AND ENERGY CHARACTERISTICS OF DESIGN SPECTRA IN LONG PERIOD RANGE |
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| WANG De-cai, NI Si-dao, YE Xian-guo. STUDY ON VALUE AND ENERGY CHARACTERISTICS OF DESIGN SPECTRA IN LONG PERIOD RANGE[J]. Engineering Mechanics, 2016, 33(1): 105-111. DOI: 10.6052/j.issn.1000-4750.2013.03.0202 |
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| Authors: | WANG De-cai NI Si-dao YE Xian-guo |
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| Affiliation: | 1.College of Architecture and Art, Hefei University of Technology, Hefei, Anhui 230601, China;;2.Institute of Geodesy and Geophysics, Chinese Academy of Science, Wuhan, Hubei 430077, China;;3.School of Civil Engineering, Hefei University of Technology, Hefei, Anhui 230009, China |
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| Abstract: | The process of calculating input energy spectrum from Fourier amplitude spectrum and the correlation between power spectral density and acceleration response spectrum on the basis of random vibration theory are introduced. The approach of calculating the input energy spectra compatible with design acceleration response spectrum is proposed based on the above theory. The synthetic input energy spectrum is calculated to match the design spectrum of “Code for aseismic design of buildings (GB 50011-2010)”. The input energy characteristics of design acceleration response spectra in long-period ranges are analyzed through comparing with the input energy spectra of real accelerograms. The results show that the input energy increases with the period in the long-period range, which are significantly different from the feature of real accelerograms. A revision for the design spectra in long-period ranges is recommended according to the characteristics of the input energy spectra of real accelerograms. |
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| Keywords: | power spectral density input energy long period random vibration design response spectra |
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