Soil–pile interaction considering structural yielding: Numerical modeling and experimental validation. (15th September 2015)

• Record Type: Journal Article
• Authors: Kampitsis, Andreas E.; Giannakos, Spyros; Gerolymos, Nikos; Sapountzakis, Evangelos J.
• Is Part Of: Engineering structures. Volume 99(2015:Sep. 15)
• Page Start: 319
• Page End: 333
• Publication Date: 2015-09-15
• Subjects: Inelastic analysis -- Pile-foundation system -- Structural yielding -- Distributed plasticity -- Fiber model -- Boundary element method -- Lateral Pushover tests -- 3D nonlinear FE; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2015.05.004
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: Advanced fiber beam model for the inelastic analysis of pile-foundations. Beam model validation against a unique series of Laboratory Pushover tests. Experimental simulation with advanced nonlinear 3D FE model. Computational efficiency of beam formulation verified through comparison with 3D FE model. Abstract: In the present study the accuracy of an efficient beam formulation for inelastic analysis of pile-foundation systems is validated against a series of Laboratory Pushover tests on vertical single piles embedded in dry sand under different load paths to failure in M – Q space conducted in the Laboratory of Soil Mechanics/Dynamics (LSMD) in NTUA. The obtained results are also compared to those from a fully 3D Nonlinear Finite Element (FE) simulation. The proposed beam formulation is based on the Boundary Element Method (BEM) accounting for shear deformation effect. A displacement based procedure is employed and inelastic redistribution is modeled through a distributed plasticity (fiber) model exploiting pile material constitutive laws and numerical integration over the cross-sections, while the surrounding soil is modeled through independent inelastic Winkler springs. The efficiency of the beam formulation is verified through the good agreement between the measured and the calculated results.