|
View Paper
OPENSEES SIMULATIONS OF AXIAL BEHAVIOUR OF SINGLE-HELIX PILES
Session: Foundations II / Fondations II
Weidong Li, University of Alberta (Canada)
Lijun Deng, University of Alberta (Canada)
Helical piles are widely used in Western Canada for many engineering applications. Soil-helical pile interactions are important for the helical pile industry and have been conventionally investigated using continuum finite element analyses, which require sophisticated modeling of soils and piles. The present research conducted simplified numerical modeling of soil and single-helix pile systems on the platform of the Open System for Earthquake Engineering Simulation (OpenSees). The numerical model adopts the beam-on-nonlinear-Winkler-foundation (BNWF) method for simulating soil-pile interactions. Soil reactions to piles are simulated by a series of q-z, t-z, and p-y springs. The numerical modeling is used to calibrate the performance of in-situ helical piles under axial loads and to understand the load-transfer mechanism during in-situ loading tests. Cone penetrometer tests (CPT) results of each test site are used as the input to parameters of the numerical models. Preliminary results showed that the BNWF method could properly simulate the capacities and load-displacement behavior of single-helix piles.
|
