| Response of Surface Soft Soil and Fine-Grained Sand Layers to Seismic Waves |
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| 作者姓名： | Xu Yonglin Xiong Lijun |
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| 作者单位： | Xu Yonglin and Xiong Lijun Seismological Bureau of Shanghai Municipality，Shanghai 200062，China |
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| 摘 要： | INTRODUCTIONManyChineseandforeignseismologistsandengineeringseismologistshavestudiedthelargecasualtiesandpropertydamagescausedbytheMexicanMS8 1earthquakeonSeptember1 9,1 985andtheHanshinMS7 4earthquakeinJapan ,onJanuary 1 7,1 995andfoundthatsurfacesoftsoilcovercansignificantlyamplifyseismicgroundmotion .Thisphenomenoncanresultinlargerfailureofbuildingswithvibrationfrequencysimilartotheamplifiedgroundmotionfrequencythanthatcausedbyearthquakesthatoccuratbedrocksiteswheretherearenoamplifi…
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| 关 键 词： | 地震响应 软土 地震观测 深部钻探 |
Response of Surface Soft Soil and Fine-Grained Sand Layers to Seismic Waves |
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| Xu Yonglin,Xiong Lijun.Response of Surface Soft Soil and Fine-Grained Sand Layers to Seismic Waves[J].Earthquake Research in China,2003,17(4):392-397. |
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| Authors: | Xu Yonglin and Xiong Lijun |
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| Institution: | Seismological Bureau of Shanghai Municioality, Shanghai 200062, China;Seismological Bureau of Shanghai Municioality, Shanghai 200062, China |
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| Abstract: | Shanghai is located in eastern China and is built on overburden soil layers. It can be seen from the Mexico Ms = 8.1 earthquake on September 19, 1985 and the Hanshin Ms = 7.4 earthquake on January 17,1995 that heavy casualties and property losses have a direct relationship with overburden soil layers. Ground motions caused by earthquakes are signifieantly amplified when passing through the soil layers. Under the influence of these amplified motions, building structures, whose nature frequency is within the frequency band of soil amplification response,will experience more severe damage than those built on bedrock. Therefore, engineering seismologists have paid considerable attention the amplification responses in the Shanghai overburden soil layers. The amplification responses of soil and sand layers in this paper are given by the ML = 4.1 earthquake in Nantong, Jiangsu Province on December 25, 2001 at 31.8° N, 120.9° E. It can be seen that the responses of soil and sand layers are very different.That is important. |
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| Keywords: | Seismic observation Deep drill Soft soil layer Fine-grained sand layer Response to seismic waves Transfer function |
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