| Seismic reflection and transmission coefficients at an air-water interface of saturated porous soil |
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| 作者姓名： | 周新民 夏唐代 徐平 邹振轩 |
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| 作者单位： | [1]Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310027, China [2]Earthquake Administration of Zhejiang Province, Hangzhou 310013, China |
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| 基金项目： | National-Natural Science Foundation of China （59808011）. |
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| 摘 要： | Based on the modified Biot＇s theory of two-phase porous media, a study was presented on seismic reflection and transmission coefficients at an air-water interface of saturated porous soil media. The major differences between air-saturated soils and water-saturated soils were theoretically discussed, and the theoretical formulas of reflection and transmission coefficients at an air-water interface were derived. The characteristics of propagation and attenuation of elastic waves in air-saturated soils were given and the relations among the frequency, the angle of incidence and the reflection, transmission coefficients were analyzed by using numerical methods. Numerical results show that the propagation characteristic of the wave in air-saturated soils is great different from that in water-saturated soils. The frequency and the angle of incidence can have great influences on the reflection and transmission coefficients at interface. Some new cognition about the wave propagation is obtained and the study suggests that we may carefully pay attention to the influence of air on the dynamic analysis of seismic wave.
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| 关 键 词： | 地震波 空气 水 界面 土壤 |
| 文章编号： | 1000-9116（2006）04-0397-09 |
| 收稿时间： | 2005-09-19 |
| 修稿时间： | 2006-04-24 |
Seismic reflection and transmission coefficients at an air-water interface of saturated porous soil |
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| ZHOU Xin-min,XIA Tang-dai,XU Ping,ZOU Zhen-xuan.Seismic reflection and transmission coefficients at an air-water interface of saturated porous soil[J].Acta Seismologica Sinica(English Edition),2006,19(4):397-405. |
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| Authors: | ZHOU Xin-min XIA Tang-dai XU Ping ZOU Zhen-xuan |
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| Institution: | 1. Institute of Geotechnical Engineering, Zhejiang University, Hangzhou 310027, China
2. Earthquake Administration of Zhejiang Province, Hangzhou 310013, China |
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| Abstract: | Based on the modified Biot’s theory of two-phase porous media, a study was presented on seismic reflection and transmission
coefficients at an air-water interface of saturated porous soil media. The major differences between air-saturated soils and
water-saturated soils were theoretically discussed, and the theoretical formulas of reflection and transmission coefficients
at an air-water interface were derived. The characteristics of propagation and attenuation of elastic waves in air-saturated
soils were given and the relations among the frequency, the angle of incidence and the reflection, transmission coefficients
were analyzed by using numerical methods. Numerical results show that the propagation characteristic of the wave in air-saturated
soils is great different from that in water-saturated soils. The frequency and the angle of incidence can have great influences
on the reflection and transmission coefficients at interface. Some new cognition about the wave propagation is obtained and
the study suggests that we may carefully pay attention to the influence of air on the dynamic analysis of seismic wave.
Foundation item: National Natural Science Foundation of China (59808011). |
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| Keywords: | seismic wave air-saturated soils propagation characteristics reflection and transmission |
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