Wyniki wyszukiwania dla: pile modelling

• FEM modelling of screw displacement pile interaction with subsoil

  Publikacja

  • P. Więcławski
  • A. Krasiński

  - Archives of Civil Engineering - Rok 2023

  Predicting the-settlement characteristics of piles is an important element in the designing of pile foundations. The most reliable method in evaluating pile-soil interaction is the static load test, preferably performed with instrumentation for measuring shaft and pile base resistances. This, however, is a mostly post-implementation test. In the design phase, prediction methods are needed, in which numerical simulations play an...

  Pełny tekst do pobrania w portalu

• Developments in unsteady pipe flow friction modelling

  Publikacja

  • R. Szymkiewicz

  - JOURNAL OF HYDRAULIC RESEARCH - Rok 2002

  W pracy omówiono wpływ błędów numerycznych na jakość rozwiązania równań uderzenia hydraulicznego. Wykazano rolę dyfuzji numerycznej i jej wpływ na dokładność rozwiązania w porównaniu z członem tarcia.

• The improvement of axial bearing capacity of open-end pipe piles

  Publikacja

  • A. Krasiński
  • M. Cudny

  - Rok 2008

  Zaproponowano sposób zwiększania nośności osiowej pali rurowych z otwartym dnem za pomocą wewnętrznych pierścieni. Przedstawiono wyniki badań w skali naturalnej i badań modelowych. Przeprowadzono analizę teoretyczną zjawiska metodą analityczną i numeryczną. Badania i analizy potwierdziły skuteczność proponowanego rozwiązania technicznego.

• Secondary arc modelling for single pole reclosing analyses

  Publikacja

  • J. Klucznik
  • Z. Lubośny
  • K. Dobrzyński
  • S. Czapp

  - Rok 2015

  The paper discusses two evaluation methods of single pole auto-reclosing process effectiveness in HV transmission lines. Secondary arc current and recovery voltage calculation results obtained by load flow calculation are compared to the results obtained by the time domain simulations. Moreover, a nonlinear secondary arc model implementation is presented. The paper presents the study results for the three types of EHV transmission...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Piel

  Czasopisma

  ISSN: 0213-9251

• APPLIED MATHEMATICAL MODELLING

  Czasopisma

  ISSN: 0307-904X , eISSN: 1872-8480

• JOURNAL OF MOLECULAR MODELING

  Czasopisma

  ISSN: 1610-2940 , eISSN: 0948-5023

• Some Aspects of Shear Behavior of Soft Soil–Concrete Interfaces and Its Consequences in Pile Shaft Friction Modeling

  Publikacja

  • J. Konkol
  • K. Mikina

  - Materials - Rok 2021

  This paper examines the stiffness degradation and interface failure load on soft soil–concrete interface. The friction behavior and its variability is investigated. The direct shear tests under constant normal load were used to establish parameters to hyperbolic interface model which provided a good approximation of the data from instrumented piles. Four instrumented piles were used to obtain reference soil–concrete interface behavior....

  Pełny tekst do pobrania w portalu

• Modelling of the High Speed Multi-Pole Synchronous Generator for Application in More Electric Aircraft Power Systems

  Publikacja

  • M. Michna
  • F. Kutt
  • M. Ronkowski

  - Rok 2015

  In this paper different models of the synchronous generator are presented. The simulation results compared with the measurements are shown. Certain physical phenomena are included in described models for the porpoise of adequate analysis of the more electric aircraft power system. For different modelling levels, such as functional level or behavioural level, different physical phenomena have been included. Simulation results for...

• Numerical analysis of pile installation effects in cohesive soils

  Publikacja

  • J. Konkol

  - Rok 2018

  In this thesis the empirical equation for radial effective stress calculation after displacement pile installation and following consolidation phase has been proposed. The equation is based on the numerical studies performed with Updated Lagrangian, Arbitrary Lagrangian-Eulerian and Coupled Eulerian-Lagrangian formulations as well as the calibration procedure with database containing world-wide 30 pile static loading tests in cohesive...

  Pełny tekst do pobrania w portalu

• The mechanism of grouting action under the base of bored pile

  Publikacja

  • A. Krasiński
  • M. Wiszniewski

  - Rok 2018

  The grouting under the base of bored pile is carried out in order to reduce pile settlement and improve its bearing capacity. The principal aim of grouting is to introduce an initial force between the soil and the pile base. In non-cohesive soil, the grouting can also enlarge the pile base area and therefore improve the base resistance. The example of static load tests on instrumented bored piles installed with and without grouting...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Pile Model Tests Using Strain Gauge Technology

  Publikacja

  • A. Krasiński
  • T. Kusio

  - Studia Geotechnica et Mechanica - Rok 2015

  Ordinary pile bearing capacity tests are usually carried out to determine the relationship between load and displacement of pile head. The measurement system required in such tests consists of force transducer and three or four displacement gauges. The whole system is installed at the pile head above the ground level. This approach, however, does not give us complete information about the pile-soil interaction. We can only determine...

  Pełny tekst do pobrania w portalu

• Effect of preconsolidation on pile bearing capacity in model tests

  Publikacja

  • L. Bałachowski
  • P. Kozak
  • E. Dembicki

  - Rok 2005

  Badanie wpływu prekonsolidacji gruntu w badaniach modelowych w komorze kalibracyjnej. Zagęszczone piaski kwarcowe poddano prekonsolidacji przy OCR nie większym od 7. Analiza współczynnika parcia spoczynkowego gruntu. Wpływ wskaźnika prekonsolidacji na nośność podstawy i pobocznicy pali oraz zmiany naprężeń wokół modelu i odkształcenia objętościowe masywu gruntowego.

• Estimation of pile bearing capacity by dynamic and static tests

  Publikacja

  • K. Gwizdała
  • T. Brzozowski
  • M. Blockus

  - Rok 2008

  Badania dynamiczne, szczególnie dla pali wbijanych, w budownictwie hydrotechnicznym stają się coraz bardziej popularne. Badania, poparte formalnie zapisami zawartymi w Eurokodzie 7, wykorzystywane w badaniach ''na wodzie'' i ''na lądzie'' są szybkie i ekonomiczne. Przedstawiono serię badań dla gruntów uwarstwionych dla pali prefabrykowanych żelbetowych, wbijanych stalowych pali rurowych oraz pali Vibro-Fundex. Badania dynamiczne...

• PIDE Working Papers

  Czasopisma

  ISSN: 0078-8228

• Accurate Modeling of a Lossy Ferrite Circular Guide Section Magnetized Through a Rotary Four-Pole Magnetic Field

  Publikacja

  • M. Mazur
  • J. Mazur
  • E. Sędek

  - ELECTROMAGNETICS - Rok 2009

  Korzystając z metody rodzajów sprzężonych opracowano model matematyczny umożliwiający określenie parametrów falowych i rozkładów pola em. fal występujących w ferrytowym falowodzie cylindrycznym magnesowanym czterobiegunowym polem magnetycznym. W oparciu o model określono macierz rozproszenia sekcji falowodu. Opracowane oprogramowanie pozwoliło na zbadanie charakterystyk częstotliwościowych sekcji ferrytowej i wskazanie możliwości...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Pale prefabrykowane

  Publikacja

  • K. Gwizdała
  • D. Sobala

  - Rok 2016

  W artykule przedstawiono stan współczesnej technologii pali prefabrykowanych, drewnianych, stalowych, żelbetowych oraz zakres ich stosowania w budownictwie.

• JOURNAL OF MOLECULAR GRAPHICS & MODELLING

  Czasopisma

  ISSN: 1093-3263 , eISSN: 1873-4243

• Modelling of steady state and transient performance of the synchronous generator considering harmonic distortions caused by non-uniform saturation of the pole shoe

  Publikacja

  • F. Kutt
  • M. Michna
  • G. A. Kostro
  • M. Ronkowski

  - ELECTRIC POWER SYSTEMS RESEARCH - Rok 2017

  In this paper a synchronous generator model is described. This model is developed on the assumption that in loaded and no load conditions the saturation effect affects the pole shoe in a different way. The developed model is based on the multiple saliency model and is formulated using winding function approach in machine variables. The influence of the non-uniform saturation of the pole shoe in load conditions on the performance...

  Pełny tekst do pobrania w serwisie zewnętrznym

• ECONOMIC MODELLING

  Czasopisma

  ISSN: 0264-9993 , eISSN: 1873-6122

• STATISTICAL MODELLING

  Czasopisma

  ISSN: 1471-082X , eISSN: 1477-0342

• THE APPLICATION OF PHENOMENOLOGICAL METHODOLOGY FOR DESIGNING PILE FOUNDATION IN PORT STRUCTURES

  Publikacja

  • P. Więcławski

  - Polish Maritime Research - Rok 2019

  It is of utmost importance in the design process that a suitable, safe and concurrently economic solution be chosen. Issues connected with foundations require adopting a special approach. Soil is a composite medium, and it is essential to describe as precisely as possible the interaction taking place between the subgrade and the structure. There are many design methods of pile foundation that are based on in-situ test of soils....

  Pełny tekst do pobrania w portalu

• Report of Eurocode 7 application for pile foundation design in Poland

  Publikacja

  • K. Gwizdała
  • A. Krasiński

  - Rok 2016

  The EC7 rules of geotechnical design are in use in Poland for several years, even though there is no National annex. With regard to pile foundations, there are valid EC7 recommendations concerning design approaches, load partial coefficients, correlation coefficients and capacity partial coefficients. Polish designers can be quite flexible when it comes to choose a method for static, bearing capacity and settlement calculations....

• The analysis of soil resistance during screw displacement pile installation

  Publikacja

  • A. Krasiński

  - Studia Geotechnica et Mechanica - Rok 2014

  The analysis of soil resistances during screw displacement pile installation based on model and field tests. The investigations were carried out as a part of research project, financed by the Polish Ministry of Science and Higher Education. A proposal of empirical method for prediction of rotation resistance (torque) during screw auger penetration in non-cohesive subsoil based on CPT result.

  Pełny tekst do pobrania w portalu

• Large deformation finite element analysis of undrained pile installation

  Publikacja

  • J. Konkol
  • L. Bałachowski

  - Studia Geotechnica et Mechanica - Rok 2016

  In this paper, a numerical undrained analysis of pile jacking into the subsoil using Abaqus software suit has been presented. Two different approaches, including traditional Finite Element Method (FEM) and Arbitrary Lagrangian–Eulerian (ALE) formulation, were tested. In the first method, the soil was modelled as a two-phase medium and effective stress analysis was performed. In the second one (ALE), a single-phase medium was assumed...

  Pełny tekst do pobrania w portalu

• Static load test on concrete pile – instrumentation and results interpretation

  Publikacja

  • A. Krasiński
  • M. Wiszniewski

  - Rok 2017

  For some time (since 8-10 years in Poland) a special static load tests on instrumented piles are carried out. Such studies are usually of a scientific nature and provide detailed quantitative data on the load transfer into the ground and characteristics of particular soil layers interaction with a pile shaft and pile base. Deep knowledge about the pile-subsoil interaction can be applied for a various design purposes, e.g. numerical...

• Journal of Chemical Information and Modeling

  Czasopisma

  ISSN: 1549-9596 , eISSN: 1549-960X

• Pale wkręcane ATLAS

  Publikacja

  • P. Kościk
  • J. Sukow
  • K. Gwizdała

  - Rok 2005

  Omówiono nową technologię pali ATLAS. Przedstawiono przykłady zastosowania w odniesieniu do gruntów silnie uwarstwionych. Przedyskutowano metody obliczeń.

• Prefabrykowane pale wbijane

  Publikacja

  • K. Gwizdała
  • J. R. Kowalski

  - Rok 2005

  Omówiono zastosowanie prefabrykowanych, żelbetowych pali wbijanych w różnych rodzajach budownictwa. Zakres pracy obejmuje dotychczasowe oraz współczesne zastosowania pali prefabrykowanych. Zawarto następujące zagadnienia: materiały do produkcji pali, charakterystykę geometryczną, sposoby łączenia, metody prefabrykacji, metody kontroli, omówiono sprzęt do wbijania, scharakteryzowano zjawiska towarzyszące wbijaniu. Podsumowaniem...

• Pale wkręcane ATLAS

  Publikacja

  • P. Kościk
  • J. Sukow
  • K. Gwizdała

  - Rok 2006

  Przedstawiono praktyczne zastosowanie nowoczesnych, przemieszczeniowych pali wkręcanych typu ATLAS. Omówiono zasady obliczeń tego rodzaju pali, również na podstawie wyników badań sondą CPT. Przykłady posadowień z terenu Polski pozwalają na ocenę mozliwości posadowień w warunkach krajowych.

• Static Load Test on Instrumented Pile – Field Data and Numerical Simulations

  Publikacja

  • A. Krasiński
  • M. Wiszniewski

  - Studia Geotechnica et Mechanica - Rok 2017

  For some time (since 8-10 years in Poland) a special static load tests on instrumented piles are carried out. Such studies are usually of a scientific nature and provide detailed quantitative data on the load transfer into the ground and characteristics of particular soil layers interaction with a pile shaft and pile base. Deep knowledge about the pile-subsoil interaction can be applied for a various design purposes, e.g. numerical...

  Pełny tekst do pobrania w portalu

• Estimation of Screw Displacement Pile-Bearing Capacity Based on Drilling Resistances

  Publikacja

  • A. Krasiński

  - Studia Geotechnica et Mechanica - Rok 2023

  This article presents an engineering, empiricalmethod of estimating the bearing capacity and settlementcharacteristics Q-s of screw displacement piles andcolumns, based on soil resistance encountered during thedrilling to form piles/columns in the ground. The methodwas developed on the basis of correlation analyses of thetest results of 24 piles made during the “DPDT-Auger”research project (Krasiński et al., 2022a). In the proposedmethod,...

  Pełny tekst do pobrania w portalu

• Determination of the bearing capacity of pile foundations based on CPT test results

  Publikacja

  • K. Gwizdała
  • M. Stęczniewski

  - Studia Geotechnica et Mechanica - Rok 2007

  Analityczne określanie pełnej krzywej obciążenie - osiadanie na podstawie parametrów geotechnicznych wciąż stanowi bardzo trudne zadanie naukowe i inżynierskie. W pracy przedstawiono metodę bezpośredniego wykorzystania oporów na stożku sondy statycznej do określania pełnej krzywej osiadania dla pali Vibro-Fundex. W sumie jako materiał weryfikacyjny wykorzystano 94 próbne obciążenia statyczne pali.

• Numerical simulation of screw displacement pile interaction with non-cohesive soil

  Publikacja

  • A. Krasiński

  - Archives of Civil and Mechanical Engineering - Rok 2014

  A trial numerical simulation of screw displacement pile interaction with non-cohesive subsoil during the transfer of compression load. The simulation was carried out in an axisymmetric system. The technological phases of pile installation in the ground were numerically modelled using equivalent processes which provided similar effects to real technical actions. The results of the numerical calculations were verified by comparing...

  Pełny tekst do pobrania w portalu

• Probabilistic analysis of settlements under a pile foundation of a road bridge pylon

  Publikacja

  • K. Winkelmann
  • K. Żyliński
  • J. Górski

  - SOILS AND FOUNDATIONS - Rok 2021

  The paper addresses the reliability change of a road bridge pile foundation due to the unpredictable increase of settlements in time. The analysis is based on the Rędziński Bridge in Wrocław, Poland, its design assumptions, and monitoring results. The bridge foundation rests on a multi-layered subsoil assumed random. The Finite Element model of the subgrade is generated in ZSoil® software. To simplify the probabilistic approach,...

  Pełny tekst do pobrania w portalu

• Chemometric analysis of bio-inspired micellar electrokinetic chromatographic systems – modelling of retention mechanism and prediction of biological properties using bile salts surfactants

  Publikacja

  • K. Ciura
  • M. Pastewska
  • S. Ulenberg
  • H. Kapica
  • P. Kawczak
  • T. Bączek

  - Microchemical Journal - Rok 2021

  Pełny tekst do pobrania w serwisie zewnętrznym

• Systems Analysis Modelling Simulation

  Czasopisma

  ISSN: 0232-9298

• The bile salt content of human bile impacts on simulated intestinal proteolysis of β-lactoglobulin

  Publikacja

  • D. Dulko
  • R. Staroń
  • L. Krupa
  • N. Rigby
  • A. Mackie
  • K. Gutkowski
  • A. Wasik
  • A. Macierzanka

  - FOOD RESEARCH INTERNATIONAL - Rok 2021

  The gastrointestinal hydrolysis of food proteins has been portrayed in scientific literature to predominantly depend on the activity and specificity of proteolytic enzymes. Human bile has not been considered to facilitate proteolysis in the small intestine, but rather to assist in intestinal lipolysis. However, human bile can potentially influence proteins that are largely resistant to gastric digestion, and which are mainly hydrolysed...

  Pełny tekst do pobrania w portalu

• The sensitiveness of the speed of pile displacement to speed variations of hammer in beating down process

  Publikacja

  • A. Milewska
  • J. Żukowska

  - Rok 2010

  In this paper there is presented dynamical system described speed of pile displacement during beating down process. Its response is determined by using Heaviside operator. There is introduced the convergence with regulator in partially ordered space. There is given an answer to the question, whetdisplacement is sensitive to hammer's speed variations.

  Pełny tekst do pobrania w serwisie zewnętrznym

• Comparative model tests of SDP and CFA pile groups in non-cohesive soil

  Publikacja

  • A. Krasiński
  • T. Kusio

  - Studia Geotechnica et Mechanica - Rok 2014

  The research topic relates to the subject of deep foundations supported on continuous flight auger (CFA) piles and screw displacement piles (SDP). The authors have decided to conduct model tests of foundations supported on the group of piles mentioned above and also the tests of the same piles working alone. The tests are ongoing in Geotechnical Laboratory of Gdańsk University of Technology. The description of test procedure, interpretation...

  Pełny tekst do pobrania w portalu

• The role of bile salts in digestion

  Publikacja

  • J. Maldonado-Valderrama
  • P. Wilde
  • A. Macierzanka
  • A. Mackie

  - ADVANCES IN COLLOID AND INTERFACE SCIENCE - Rok 2011

  Bile salts (BS) are bio-surfactants present in the gastrointestinal tract (GIT) that play a crucial role in the digestion and absorption of nutrients. The importance of BS for controlled release and transport of lipid soluble nutrients and drugs has recently stimulated scientific interest in these physiological compounds. BS are so-called facial amphiphiles showing a molecular structure that is very distinct from classical surfactants....

  Pełny tekst do pobrania w serwisie zewnętrznym

• Zero-Pole Electromagnetic Optimization

  Publikacja

  • N. Leszczynska
  • A. Lamęcki
  • M. Mrozowski

  - IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS - Rok 2017

  A fast technique for the full-wave optimization of transmission or reflection properties of general linear timeinvariant high-frequency components is proposed. The method is based on the zeros and poles of the rational function representing the scattering parameters of the device being designed and it is the generalization of the technique developed for the design by optimization of microwave filters. The performance of the proposed...

  Pełny tekst do pobrania w serwisie zewnętrznym

• Numerical estimation of the pile toe and shaft unit resistances during the installation process in sands

  Publikacja

  • J. Konkol

  - Studia Geotechnica et Mechanica - Rok 2015

  Numerical simulations of a pile jacking were carried out. A Coupled Eulerian–Lagrangian (CEL) formulation was used to treat with large deformation problems. An Abaqus, a commercial Finite Element Method software suit, was used as a computing environment. The Mohr–Coulomb constitutive model was applied and the Coulomb model of friction was used to describe pile-soil interaction. Calculations were made for three different pile diameters....

  Pełny tekst do pobrania w portalu

• Effects of full displacement pile installation on the stress and deformation state of surrounding soil: review

  Publikacja

  • W. F. Kabeta

  - Archives of Civil Engineering - Rok 2022

  Several field and model tests have been conducted to investigate the impact of pile installation on bearing capacity. However, little is known about how piles behave during installation, how they interact with the surrounding soil, and how this affects sandy soil properties. This review paper investigates the effect of pile driving on surrounding sandy soil as it compacts sandy soil near to the pile. For this purpose, various related...

  Pełny tekst do pobrania w portalu

• COMBUSTION THEORY AND MODELLING

  Czasopisma

  ISSN: 1364-7830 , eISSN: 1741-3559

• Journal of Modelling in Management

  Czasopisma

  ISSN: 1746-5664 , eISSN: 1746-5672

• Journal of Choice Modelling

  Czasopisma

  ISSN: 1755-5345

• Journal of Language Modelling

  Czasopisma

  ISSN: 2299-8470 , eISSN: 2299-856X

• Modelling, Measurement and Control A

  Czasopisma

  ISSN: 1259-5985

• Mathematical Modelling and Control

  Czasopisma

  eISSN: 2767-8946