000013229 001__ 13229
000013229 005__ 20161114160332.0
000013229 04107 $$aeng
000013229 046__ $$k2009-06-22
000013229 100__ $$aAssimaki, D.
000013229 24500 $$aNonlinear macroelements for performance-based design applications of pile-supported wharves

000013229 24630 $$n2.$$pComputational Methods in Structural Dynamics and Earhquake Engineering
000013229 260__ $$bNational Technical University of Athens, 2009
000013229 506__ $$arestricted
000013229 520__ $$2eng$$aImplementation of performance-based design procedures for pile-supported waterfront structures involves estimation of the dynamic wharf response for hazard scenarios that include liquefaction of the backfill. In these cases, empirical techniques based on quasi-static observations and widely implemented in practice for the analysis of dynamic soil-pile interaction problems, may not be used to address the role of critical parameters such as soil permeability, rate of loading and residual soil strength in the wharf performance, nor simulate radiation damping phenomena for liquefiable soils in transient loading. On the other hand, very few experimental results exist on dynamic soil-pile interaction effects in liquefiable sites to justify the development of generic mechanical elements for this class of problems. In this paper, we investigate the macroscopic response of pile foundations in liquefiable soils during transient loading by means of 3D FEM and identify the critical parameters of the response. We then propose a dynamic macroelement formulated explicitly to simulate soil-pile interaction effects in liquefiable sites during transient loading on the basis of our parametric analyses. Calibration of the macroelement and validation of its performance by comparison with full-scale field experiments is currently under progress.

000013229 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000013229 653__ $$aSoil-structure Interaction, soil liquefaction, seismic loading of piles, Bouc-Wen model. Abstract. Implementation of performance-based design procedures for pile-supported waterfront structures involves estimation of the dynamic wharf response for hazard scenarios that include liquefaction of the backfill. In these cases, empirical techniques based on quasi-static observations and widely implemented in practice for the analysis of dynamic soil-pile interaction problems, may not be used to address the role of critical parameters such as soil permeability, rate of loading and residual soil strength in the wharf performance, nor simulate radiation damping phenomena for liquefiable soils in transient loading. On the other hand, very few experimental results exist on dynamic soil-pile interaction effects in liquefiable sites to justify the development of generic mechanical elements for this class of problems. In this paper, we investigate the macroscopic response of pile foundations in liquefiable soils during transient loading by means of 3D FEM and identify the critical parameters of the response. We then propose a dynamic macroelement formulated explicitly to simulate soil-pile interaction effects in liquefiable sites during transient loading on the basis of our parametric analyses. Calibration of the macroelement and validation of its performance by comparison with full-scale field experiments is currently under progress.

000013229 7112_ $$aCOMPDYN 2009 - 2nd International Thematic Conference$$cIsland of Rhodes (GR)$$d2009-06-22 / 2009-06-24$$gCOMPDYN2009
000013229 720__ $$aAssimaki, D.$$iVarun, V.
000013229 8560_ $$ffischerc@itam.cas.cz
000013229 8564_ $$s1914077$$uhttps://invenio.itam.cas.cz/record/13229/files/CD323.pdf$$yOriginal version of the author's contribution as presented on CD, section: Computational methods in geotechnical earthquake engineering - ii.
000013229 962__ $$r13074
000013229 980__ $$aPAPER