Soft Soil Site Characterization on the Coast of Yantai and Its Effect on Ground Motion Parameters

(整期优先)网络出版时间:2005-02-12
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AccordingtotheChineseGB50011-2001codeandtherecommendedprovisionsofFEMANEHRPandEUROCODE8,byusingshearwavevelocityandboreholedata,thesiteclassificationisevaluatedforatypicalsoftsoilsiteontheYantaiseacoast.Thesiteseismicgroundmotioneffectisanalyzedandtheinfluenceofthecoastalsoilondesigngroundmotionparametersisdiscussed.Theresultsshowthatthebriefsiteclassificationcannotrepresenttherealconditionsofasoftsoilsite;thesoftsoilonthecoasthasaremarkableimpactonthemagnitudeandspectrumofgroundmotionacceleration.Themagnificationonpeakaccelerationisbigger,however,duetothenonlineardeformationofthesoil.Themagnificationisreducednonlinearlywiththeincreaseofinputgroundmotion;thespectrumisbroadenedandthecharacteristicperiodelongatedonthesoftsoilsite.