Normal fault rupture interaction with strip foundations

Anastasopoulos, I; Gazetas, G; Bransby, MF; Davies, MR; El Nahas, A

dc.contributor.author	Anastasopoulos, I	en
dc.contributor.author	Gazetas, G	en
dc.contributor.author	Bransby, MF	en
dc.contributor.author	Davies, MR	en
dc.contributor.author	El Nahas, A	en
dc.date.accessioned	2014-03-01T01:31:23Z
dc.date.available	2014-03-01T01:31:23Z
dc.date.issued	2009	en
dc.identifier.issn	1090-0241	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/19795
dc.subject	Centrifuge models	en
dc.subject	Finite element method	en
dc.subject	Foundations	en
dc.subject	Geological faults	en
dc.subject	Seismic effects	en
dc.subject	Soil-structure interaction	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	Centrifugation	en
dc.subject.other	Centrifuges	en
dc.subject.other	Earthquake effects	en
dc.subject.other	Finite element method	en
dc.subject.other	Geologic models	en
dc.subject.other	Piles	en
dc.subject.other	Seismology	en
dc.subject.other	Soil structure interactions	en
dc.subject.other	Soils	en
dc.subject.other	Centrifuge model tests	en
dc.subject.other	Centrifuge models	en
dc.subject.other	Geological faults	en
dc.subject.other	Normal faults	en
dc.subject.other	Parameter studies	en
dc.subject.other	Rigid-body rotations	en
dc.subject.other	Rupture propagation	en
dc.subject.other	Seismic effects	en
dc.subject.other	Soil-structure interaction	en
dc.subject.other	Stress fields	en
dc.subject.other	Strip foundations	en
dc.subject.other	Surface faults	en
dc.subject.other	Foundations	en
dc.subject.other	centrifugal model test	en
dc.subject.other	crack propagation	en
dc.subject.other	fault	en
dc.subject.other	finite element method	en
dc.subject.other	foundation	en
dc.subject.other	observational method	en
dc.subject.other	rupture	en
dc.subject.other	seismic design	en
dc.subject.other	seismic response	en
dc.subject.other	soil-structure interaction	en
dc.subject.other	structural response	en
dc.title	Normal fault rupture interaction with strip foundations	en
heal.type	journalArticle	en
heal.identifier.primary	10.1061/(ASCE)1090-0241(2009)135:3(359)	en
heal.identifier.secondary	http://dx.doi.org/10.1061/(ASCE)1090-0241(2009)135:3(359)	en
heal.language	English	en
heal.publicationDate	2009	en
heal.abstract	Observations after earthquakes where surface fault ruptures crossed engineering facilities reveal that some structures survived the rupture almost unscathed. In some cases, the rupture path appears to divert, ""avoiding"" the structure. Such observations point to an interaction between the propagating rupture, the soil, and the foundation. This paper (i) develops a two-step nonlinear finite-element methodology to study rupture propagation and its interaction with strip foundations; (ii) provides validation through successful Class ""A"" predictions of centrifuge model tests; and (iii) conducts a parameter study on the interaction of strip foundations with normal fault ruptures. It is shown that a heavily loaded foundation can substantially divert the rupture path, which may avoid outcropping underneath the foundation. The latter undergoes rigid body rotation, often detaching from the soil. Its distress arises mainly from the ensuing loss of support that takes place either at the edges or around its center. The average pressure q on the foundation largely dictates the width of such unsupported spans. Increasing q decreases the unsupported width, reducing foundation distress. The role of q is dual: (1) it compresses the soil, ""flattening"" fault-induced surface ""anomalies"" and (2) it changes the stress field underneath the foundation, facilitating rupture diversion. However, even if the rupture is diverted, the foundation may undergo significant stressing, depending on its position relative to the fault outcrop. © 2009 ASCE.	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(2009)135:3(359)	en
dc.identifier.isi	ISI:000263396300005	en
dc.identifier.volume	135	en
dc.identifier.issue	3	en
dc.identifier.spage	359	en
dc.identifier.epage	370	en