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Unformatted text preview: 1 CE 316 Geotechnical Earthquake Engineering Week 7 Dynamic Soil Properties Where are we? Path Site Surficial Layers Fault Source 1&2. Earthquakes A&B Dyn. Vibrations 3. Strong Motion 4. Seismic Hazard 5. Wave Propagation 6. Dynamic Soil Properties Dynamic Soil Properties Wave Propagation StressStrain Soil Response Constitutive Relations Approximations: – Linear – Equivalent Linear Measurement of Dynamic Soil Properties Field Laboratory Models Measurement Methods Geophysical Methods Campanella, R. (1995). Field methods for dynamic geotechnical testing: an overview of capabilities and needs. Dynamic Geotechnical Testing II , ASTM STP 1213. Field Laboratory Seismic Reflection Test 1 velocity wave travel of distance p d v x t = = ( 29 1 2 2 1 2 2 4 2 2 velocity wave travel of distance p p r v x H v x H t + = + = = H x i 2 tan 1 = 2 i 1 p v 2 p v direct wave: Reflected wave: Seismic Reflection Test 2 2 1 4 r p H x t v + = H x i 2 tan 1 = 2 i t 1 2 p H v 1 1 p v 1 p v 2 p v x 2 2 1 1 2 p r H v t x = Solve for H: S R Seismic Reflection Test ( 29 ( 29 B p RA B RA RB RB RA p x v t x t t t t v 1 2 2 1 2 sin + = α z α α 1 p v B x 2...
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This note was uploaded on 02/27/2011 for the course CIV ENG 316 taught by Professor Louis during the Spring '11 term at Missouri S&T.
 Spring '11
 Louis

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