| 双侧破裂模型对地震动空间相关性影响的定量研究 |
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| 引用本文： | 金星,张明宇,王绍博,丁海平,陈超.双侧破裂模型对地震动空间相关性影响的定量研究[J].地震工程与工程振动,2001,21(1):1-8. |
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| 作者姓名： | 金星 张明宇 王绍博 丁海平 陈超 |
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| 作者单位： | 1. 中国地震局工程力学研究所，
2. 中国地震局工程力学研学所, |
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| 基金项目： | 国家自然科学基金会的资助项目!（编号为59895410）；地震学联合基金会资助（编号为95—07—444） |
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| 摘 要： | 本在震源为双侧线状断层破裂模型的假定下，根据震源理论和波谱随空间坐标的展开式，得到了场地两点地震动Fourier谱的表达式Ab(f)=Aa(f)exp(a1δ0 a2δθ，中提出了将双侧破裂模型分解为两个单侧破裂模型计算双侧破裂模型a1和a2的数值方法，以一次地震（M＝6）为例，分析了双侧破裂模型对地震动空间相关性的影响，计算了 a1和a2的实部和虚部以及孔径随震中距，方位角和频率变化的三维图像。
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| 关 键 词： | 双侧破裂模型 地震动 空间相关性 相关半径 地震工程 震源 波谱 |
| 文章编号： | 1000-1301(2001)01-0001-08 |
| 修稿时间： | 2000年10月10 |
Quantitative research on effects of bilateral rupture fault on spatial orrelation of strong ground motion |
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| JIN Xing,CHEN Chao,ZHANG Ming-yu,WANG Shao-bo,DING Hai-ping.Quantitative research on effects of bilateral rupture fault on spatial orrelation of strong ground motion[J].Earthquake Engineering and Engineering Vibration,2001,21(1):1-8. |
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| Authors: | JIN Xing CHEN Chao ZHANG Ming-yu WANG Shao-bo DING Hai-ping |
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| Abstract: | On the assumption that the seismic source is simplified as a bilateral rupture linear fault with finite length, this paper quantitatively studies the seismic source effects on spatial correlation of strong ground motion. Based on the expanding expression of Fourier spectrum of strong ground motion with spatial coordinate variables, this paper also gives an expression for describing variable law of strong ground motion field, that is Ab(f)= Aa(f)expa1 r0+ a2 ]. The numerical method for calculating parameters a1 and a2 is given on the basis of the fact that the bilateral rupture fault is decomposed into two single-direction rupture faults. Finally, taking an earthquake as an example, this paper gives three-dimensional patterns of real and imaginary parts of a1 and a2, and the radius of the field with epicenter distance and direction angle as well as frequency. |
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| Keywords: | bilateral rupture fault strong ground motion space correlation correlation radius |
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