DYNAMIC PILE SOIL PILE INTERACTION .1. ANALYSIS OF AXIAL VIBRATION

GAZETAS, G; MAKRIS, N

dc.contributor.author	GAZETAS, G	en
dc.contributor.author	MAKRIS, N	en
dc.date.accessioned	2014-03-01T01:40:52Z
dc.date.available	2014-03-01T01:40:52Z
dc.date.issued	1991	en
dc.identifier.issn	0098-8847	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/23284
dc.subject.classification	Engineering, Civil	en
dc.subject.classification	Engineering, Geological	en
dc.subject.other	DEFORMATION	en
dc.title	DYNAMIC PILE SOIL PILE INTERACTION .1. ANALYSIS OF AXIAL VIBRATION	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1991	en
heal.abstract	Simple methods of analysis are developed for computing the dynamic steady-state axial response of floating pile groups embedded in homogeneous and non-homogeneous soil deposits. Physically-motivated approximations are introduced to account for the interaction between two individual piles. It is found that such an interaction arises chiefly from the 'interference' of wave fields originating along each pile shaft and spreading outward. For homogeneous deposits the wave fronts originating at an individual pile are cylindrical and the interaction is essentially independent of pile flexibility and slenderness. For non-homogeneous deposits the wave fronts are non-cylindrical and ray-theory approximations are invoked to derive pile flexibility-dependent interaction functions. Results are presented for the dynamic stiffness and damping of several pile groups, as well as for distribution of the applied load among individual piles. For deposits with modulus proportional to depth, the agreement with the few rigorous solutions available is encouraging. A comprehensive parameter study focuses on the effects of soil inhomogeneity and pile-group configuration. It is demonstrated that the 'dynamic group efficiency' may far exceed unity at certain frequencies. Increasing soil inhomogeneity tends to reduce the respective resonant peaks and lead to smoother interaction functions, in qualitative agreement with field evidence.	en
heal.publisher	JOHN WILEY & SONS LTD	en
heal.journalName	EARTHQUAKE ENGINEERING & STRUCTURAL DYNAMICS	en
dc.identifier.isi	ISI:A1991EX33300002	en
dc.identifier.volume	20	en
dc.identifier.issue	2	en
dc.identifier.spage	115	en
dc.identifier.epage	132	en