NEHRP Clearinghouse
- Title
- Dynamic Interaction Factors for Floating Pile Groups.
- File
- PB91170381.pdf
- Author(s)
- Gazetas, G.; Fan, K.; Kaynia, A.; Kausel, E.
- Source
- National Science Foundation, Washington, DC., September 10, 1990, 87 p.
- Identifying Number(s)
- NCEER-90-0021
- Abstract
- 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.
- Keywords
- Seismic design; Graphs (Charts); Earthquake engineering; Pile foundations; Soil-structure interactions; Dynamic structural analysis