An Analytical Solution Procedure for Dynamic Analysis of Soil-Structure Systems Subjected to Periodic Loading

Electronic journal of geotechnical engineering

Asrat Worku¹ 

[1] Associate Professor, Department of Civil Engineering, Addis Ababa University, Ethiopia

关键词: Non-proportional damping;    geometric damping;    modal superposition;    periodic loading;    soil-structure interaction.;   

DOI  :  

来源: Oklahoma State University

【 摘 要 】

Thedynamicanalysisofmulti-degree-of-freedomsystemsinteractingwiththefoundationsoilandactedbyasystemofperiodicloadsisconsidered.Suchsystemsbelongtothecategoryofnon-classicallydampedsystems.Themethodofmodalsuperpositionisemployedforcoordinatetransformation.Theresultingcoupledalgebraicequationsareeasilysolvedanalyticallywithoutresortingtoiterations,whichwouldotherwisebenecessaryintime-domainanalysesforirregularexcitationslikeearthquakegroundmotions.Apracticalmethodofcompilingthenon-proportionaldampingmatrixisadaptedfortheintendedpurpose.Theproposedmethodofsolutionisconvenienttouseonspreadsheets,withMATLABortointegrateitwithexistingsoftwareforroutinestructuralanalyses.Theapplicationisillustratedindetailonasimplifiedmodelofasymmetrically-loadedframefoundedonarigidmat.Themethodisequallyapplicabletosystemsthesuperstructureofwhichisdiscretizedusingfinite-elementmethodandthefoundationsystemconsistingofasetofisolatedrigidfootingsorpilesunderisolatedrigidpilecaps.

【 授权许可】

Unknown