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where,Table 2.4: Summary 1 of dynamic soil parameters for Smith’s soil modelSwann andAbbs (1984)N/AN/A0.16 s/m (gravel &sand), 0.33s/m to0.49 s/m (silt), 0.66s/m (clay)0.16 s/m to 0.33 s/m(gravel); 0.33 s/m to0.66 s/m (sand); 0.33s/m to 1.64 s/m (silt);0.03 s/m to 3.28 s/m(clay)44ν = soil poisson’s ratioE = soil Young’s modulusPy = yielding stress on cavityqb = stress intensity at pile toeIb = influence coefficient,Pd = peak dynamic loadPs = peak static loadfs = unit shaft resistancero = radius of pile,rm = radius of the influence zoneDescriptionQuake Shaft(qS)Quake Toe(qT)Smith ShaftDampingFactor(JS)Smith ToeDampingFactor(JT)D = pile diameterHill (1950)N/AN/AN/A( )Smith(1962)2.5 mm2.5 mm0.16s/m0.49s/mTimoshenko andGoodier (1970)N/A( )N/AN/A0.78 to 0.5D = pile diameterE = soil Young’s modulus.Coyle andGibson (1970)N/AN/AN/A( )Coyle et al.(1973)2.5 mm2.5 mm0.66 s/m(clay), 0.16s/m (sand),0.33 s/m(silt)0.03 s/m(clay), 0.49s/m(sand &silt)v = velocity of soildeformationN = exponential powermodification, 0.2 (sand)and 0.18 (clay)Randolphand Wroth(1978)N/AN/AN/A( )G = average shear modulus in theinfluence zone