Lateral vibration and internal forces of grouped piles in layered soil

Mylonakis, G; Gazetas, G

dc.contributor.author	Mylonakis, G	en
dc.contributor.author	Gazetas, G	en
dc.date.accessioned	2014-03-01T01:14:44Z
dc.date.available	2014-03-01T01:14:44Z
dc.date.issued	1999	en
dc.identifier.issn	1090-0241	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13215
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	Layered soils	en
dc.subject.other	Computer simulation	en
dc.subject.other	Mathematical models	en
dc.subject.other	Soils	en
dc.subject.other	Springs (components)	en
dc.subject.other	Transfer functions	en
dc.subject.other	Vibrations (mechanical)	en
dc.subject.other	Piles	en
dc.subject.other	dynamic response	en
dc.subject.other	pile group	en
dc.subject.other	pile response	en
dc.subject.other	Winkler foundation	en
dc.title	Lateral vibration and internal forces of grouped piles in layered soil	en
heal.type	journalArticle	en
heal.identifier.primary	10.1061/(ASCE)1090-0241(1999)125:1(16)	en
heal.identifier.secondary	http://dx.doi.org/10.1061/(ASCE)1090-0241(1999)125:1(16)	en
heal.language	English	en
heal.publicationDate	1999	en
heal.abstract	Simplified analytical models are developed for the lateral harmonic response of single piles and pile groups in layered soil. Pile-to-soil interplay is represented by a dynamic Winkler formulation based on frequency-dependent springs and dashpots. For pile-to-pile interaction, the wave field originating from each oscillating ('source') pile and diffraction of this field by the adjacent ('receiver') piles are considered. The response of single piles and pile pairs is evaluated both numerically (through a transfer-matrix formulation) and analytically (introducing an efficient virtual-work approximation). Closed-form solutions are obtained: (1) for the impedance of single piles; (2) for the dynamic interaction factors between two piles; and (3) for the 'additional' internal forces ('distress') developing in grouped piles because of pile-to-pile interaction, a phenomenon frequently ignored in current methods of analysis. Both swaying and rocking vibrational modes are considered. The effect of pile length and soil layering on the impedances and interaction factors is studied. The predictions of the model are in agreement with earlier results, while its simplicity offers a versatile alternative to rigorous solutions.Simplified analytical models are developed for the lateral harmonic response of single piles and pile groups in layered soil. Pile-to-soil interplay is represented by a dynamic Winkler formulation based on frequency-dependent springs and dashpots. For pile-to-pile interaction, the wave field originating from each oscillating ('source') pile and the diffraction of this field by the adjacent ('receiver') piles are considered. The response of single piles and pile pairs is evaluated both numerically (through a transfer-matrix formulation) and analytically (introducing an efficient virtual-work approximation). Closed-form solutions are obtained: (1) for the impedance of single piles; (2) for the dynamic interaction factors between two piles; and (3) for the 'additional' internal forces ('distress') developing in grouped piles because of pile-to-pile interaction, a phenomenon frequently ignored in current methods of analysis. Both swaying and rocking vibrational modes are considered. The effect of pile length and soil layering on the impedances and interaction factors is studied. The predictions of the model are in agreement with earlier results, while its simplicity offers a versatile alternative to rigorous solutions.	en
heal.publisher	ASCE-AMER SOC CIVIL ENGINEERS	en
heal.journalName	Journal of Geotechnical and Geoenvironmental Engineering	en
dc.identifier.doi	10.1061/(ASCE)1090-0241(1999)125:1(16)	en
dc.identifier.isi	ISI:000077515200003	en
dc.identifier.volume	125	en
dc.identifier.issue	1	en
dc.identifier.spage	16	en
dc.identifier.epage	25	en