Numerical analysis of monotonic and cyclic long-term deformations in pile tests from the TU Darmstadt blind prediction contest using an HCA model

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F25%3A10513606" target="_blank" >RIV/00216208:11310/25:10513606 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=7TqPq-o3m9" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=7TqPq-o3m9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.compgeo.2025.107465" target="_blank" >10.1016/j.compgeo.2025.107465</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Numerical analysis of monotonic and cyclic long-term deformations in pile tests from the TU Darmstadt blind prediction contest using an HCA model

Popis výsledku v původním jazyce

This article presents the results of numerical simulations for a series of physical pile tests subjected to monotonic and high cyclic loading, conducted as part of the TU Darmstadt blind prediction contest. The mechanical behavior of the soil was modeled using a hypoplastic model for sands with intergranular strain, coupled with a high-cycle accumulation model. Both components were meticulously calibrated based on an extensive experimental dataset, including oedometer compression tests and drained monotonic and cyclic triaxial tests, covering a broad range of initial densities and effective stresses. Three-dimensional pile simulations were performed using Abaqus Standard software, resulting in Class A simulations (blind predictions based solely on laboratory calibrations). The numerical results closely matched experimental data for monotonic lateral loading. However, initial predictions overestimated lateral displacement under cyclic loading. Additional simulations were carried out for identifying the key mechanisms responsible for this overestimation. They include implementation error, stress-dependent initial void ratio, void ratio-dependent stiffness, and initialization of the cyclic preloading state variable. The effect of individual mechanisms is demonstrated in the paper. Finally, a refined model has been defined which yielded accurate predictions of cyclic accumulation. This study underscores both the strengths and limitations of the applied modeling approach for simulating laterally loaded piles under monotonic and cyclic conditions.

Název v anglickém jazyce

Numerical analysis of monotonic and cyclic long-term deformations in pile tests from the TU Darmstadt blind prediction contest using an HCA model

Popis výsledku anglicky

This article presents the results of numerical simulations for a series of physical pile tests subjected to monotonic and high cyclic loading, conducted as part of the TU Darmstadt blind prediction contest. The mechanical behavior of the soil was modeled using a hypoplastic model for sands with intergranular strain, coupled with a high-cycle accumulation model. Both components were meticulously calibrated based on an extensive experimental dataset, including oedometer compression tests and drained monotonic and cyclic triaxial tests, covering a broad range of initial densities and effective stresses. Three-dimensional pile simulations were performed using Abaqus Standard software, resulting in Class A simulations (blind predictions based solely on laboratory calibrations). The numerical results closely matched experimental data for monotonic lateral loading. However, initial predictions overestimated lateral displacement under cyclic loading. Additional simulations were carried out for identifying the key mechanisms responsible for this overestimation. They include implementation error, stress-dependent initial void ratio, void ratio-dependent stiffness, and initialization of the cyclic preloading state variable. The effect of individual mechanisms is demonstrated in the paper. Finally, a refined model has been defined which yielded accurate predictions of cyclic accumulation. This study underscores both the strengths and limitations of the applied modeling approach for simulating laterally loaded piles under monotonic and cyclic conditions.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

<a href="/cs/project/LUC24143" target="_blank" >LUC24143: Konceptualizace a modelování akumulace tepelné energie pro hybridní systémy dálkového vytápění a chlazení v České republice</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Computers and Geotechnics

ISSN

0266-352X

e-ISSN

1873-7633

Svazek periodika

187

Číslo periodika v rámci svazku

November

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

107465

Kód UT WoS článku

001544480600003

EID výsledku v databázi Scopus

2-s2.0-105011851704