09-03-2013, 12:33 PM
Dynamic Interaction Factors for Floating Pile Groups
Author: G.Gazetas, K.Fan, A.Kaynia, E.Kausel | Size: 2 MB | Format: PDF | Quality: Scanner | Publisher: NCEER | Year: 1990 | pages: 92
A comprehensive set of dimensionless graphs of complex-valued dynamic interaction factors versus frequency is presented for vertical, horizontal, and rocking harmonic excitations at the head of individual piles. These readily-applicable graphs have been developed with a rigorous analytical-numerical formulation for two idealized soil profiles (a homogeneous halfspace with modulus proportional to depth) and three pile separation distances (3, 5 and 10 pile-diameters). A wide range of values have been parametrically assigned to pile slenderness and pile-to-soil stiffness ratios. The results are discussed at length to gain valuable insight into the nature of dynamic pile-soil-pile interaction. Geotechnical and earthquake engineers can use the presented graphs exactly as they use the classical interaction factors for static deformation analysis of pile groups.
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