| 钟菊芳,胡晓,吴胜兴.能量等效速度谱衰减分析及在设定地震中的应用[J].水利学报,2007,38(1):86-93 |
| 能量等效速度谱衰减分析及在设定地震中的应用 |
| Attenuation law of energy equivalent velocity spectra and its application in scenario earthquake |
| 投稿时间：2006-07-06 |
| DOI： |
| 中文关键词: 能量等效速度谱 衰减模型 设定地震 |
| 英文关键词: energy equivalent velocity spectrum attenuation equations scenario earthquake earthquake magnitude and hypocentral distance |
| 基金项目:科技部重大公益专项项目(2002DIA10002);国家自然科学基金重大项目(E090102;E090102-90510017) |
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| 中文摘要: |
| 利用我国大陆与北美大陆在地震构造、地震成因、地震活动特点等方面的相似性，依据美国西部基岩强震记录资料，建立了适用于我国大陆的能量等效速度谱衰减关系，分析了震级、震中距对能量等效速度谱的影响规律。分析表明,水平和竖向分量能量等效速度谱随震级的增加和距离的减小而增加；谱的卓越周期随震级的增加而增加。同时，将能量等效速度谱应用于设定地震的确定，提出了按02s周期点能量等效速度谱确定工程场址设定地震的方法，并将该方法应用于新疆克孜尔坝址地震动参数的确定，得到了坝址100年超越概率为2%的设定地震M=6.75、R=9.70km及相应的设计反应谱。由于基于能量等效速度谱的设定地震方法同时考虑了地震动幅值、频谱和持时的影响，根据该方法确定的设计反应谱介于一致概率反应谱和规范反应谱之间，克服了一致概率反应谱在中长周期处明显偏大的缺点，从而验证了本文设定地震方法的合理性。 |
| 英文摘要: |
| Based on the strong ground motion data of western North America, the attenuation relationships of energy equivalent spectra were obtained according to the similarities in geology, seismology and regional tectonic et al. between China and western North America, and the variations of energy equivalent velocity spectra for earthquake magnitude and hypocentral distance were analyzed. It is found that the energy equivalent velocity spectra increase with the magnitude and hypocentral distance. A scenario earthquake method integrating the amplitude, duration and frequency of ground motion is suggested. In this method the magnitude and hypocentral distance of scenario earthquake are determined according to the energy equivalent velocity spectrum in the period of 0.2s. This method is applied to determine the scenario earthquake and designed response spectra of a hydro project in the Xinjiang Autonomous Region, China, with 2% of exceeded probability in 100 years. |
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