Wyniki wyszukiwania dla: GROUTED ANCHOR

• Elastic wave propapagation in diagnostics of self-drilling system of grouted anchors

  Publikacja

  • B. Zima
  • M. Rucka

  - Diagnostyka - Rok 2017

  The paper presents an experimental investigation of elastic wave propagation in a self-drilling hollow bar system, which is commonly used in geotechnical industry as the element of grouted ground anchors and soil nails. The single self-drilling hollow bar and self-drilling system of two bars connected by a coupler were considered. Longitudinal waves were excited at one end of the bar and registered at both ends, by means of PZT...

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• Wave propagation in damage assessment of ground anchors

  Publikacja

  • B. Zima
  • M. Rucka

  - Journal of Physics : Conference Series - Rok 2015

  The inspection possibilities of ground anchors are limited to destructive test such as pull-out test. Guided wave propagation gives an opportunity to develop an inspection system dedicated to determine the condition of inspected element without violation of their integrity. In this paper the experimental study on wave propagation in laboratory models of ground anchors are presented. Experiments were conducted for different bonding...

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• Experimental and numerical analysis of wave propagation in ground anchors

  Publikacja

  • B. Zima
  • M. Rucka

  - Rok 2016

  The article focuses on wave propagation phenomenon in ground anchors. The main aim of the investigation is the non-destructive diagnostics and the assessment of the state of ground anchors, using the guided wave propagation method. Laboratory models of anchors with different lengths of the anchor body were tested and voltage signals of propagating waves were registered at several locations. For all tested specimens corresponding...

• Non-destructive inspection of ground anchors using guided wave propagation

  Publikacja

  • B. Zima
  • M. Rucka

  - INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES - Rok 2017

  This paper deals with numerical and experimental investigations of specific problems of guided wave propagation in ground anchors. The research focuses on recognizing the phenomenon of the energy transfer between anchor components. Particular attention is paid to characteristic features of guided waves propagating in free and embedded parts of the tendon, at the interface between the tendon and the surrounding anchor body as well...

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• Ground anchors diagnostic process based on elastic wave propagation method

  Publikacja

  • B. Zima

  - Prace Studentów Politechniki Wrocławskiej. Seria : Konferencje - Rok 2015

  The paper is focused on analysis of elastic wave propagation in the context of diagnostics of ground anchors. Numerical simulations were performed to assess the possibility of evaluation of the anchorage quality. It was assumed that the quality and the load capacity of the anchor system directly depend on the length, on which mortar and steel cooperate.

• The iterative method in search for the state of equilibrium in anchor lines.

  Publikacja

  • J. Bielański
  • M. Bogdaniuk

  - Marine Technology Transactions. Technika Morska - Rok 2003

  Przedstawiono iteracyjną metodę rozwiązywania równań równowagi lin kotwicznych. Metoda jest szczególnie łatwa do zaprogramowania obliczeń numerycznych, ponieważ w każdym kroku iteracyjnym wymaga jedynie obliczania całek oznaczonych znanych funkcji. Wynikiem obliczeń są wartości sił podłużnych w linie i jej kształt, który na skutek oddziaływania prądu oceanicznego na linę może być krzywą przestrzenną. Przytoczone przykłady...

• The carbohydrate glycosylphosphatidylinositol anchor chain under mechanical stress

  Publikacja

  • A. Brzyska
  • P. Korycki
  • K. Woliński

  - CARBOHYDRATE RESEARCH - Rok 2022

  Carbohydrates have quite complicated micro heterogenic structure which may undergo different structural transitions. Due to their extreme flexibility it is very difficult to investigate such structural changes experimentally. In these studies we want to predict what structural and conformational changes are possible in the carbohydrate 

• Single-Anchor Indoor Localization Using ESPAR Antenna

  Publikacja

  • M. Rzymowski
  • P. Woźnica
  • Ł. Kulas

  - IEEE Antennas and Wireless Propagation Letters - Rok 2016

  In this paper a new single-anchor indoor localization concept employing Electronically Steerable Parasitic Array Radiator (ESPAR) antenna has been proposed. The new concept uses a simple fingerprinting algorithm adopted to work with directional main beam and narrow minimum radiation patterns of ESPAR antenna that scans 360° area around the base station, while the signal strength received from a mobile terminal is being recorded...

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• Calibration-Free Single-Anchor Indoor Localization Using an ESPAR Antenna

  Publikacja

  • M. Groth
  • K. Nyka
  • Ł. Kulas

  - SENSORS - Rok 2021

  In this paper, we present a novel, low-cost approach to indoor localization that is capable of performing localization processes in real indoor environments and does not require calibration or recalibration procedures. To this end, we propose a single-anchor architecture and design based on an electronically steerable parasitic array radiator (ESPAR) antenna and Nordic Semiconductor nRF52840 utilizing Bluetooth Low Energy (BLE)...

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• Use of X-ray radiography in the diagnosis of bonded anchors

  Publikacja

  • M. Niedostatkiewicz
  • J. Haras
  • K. Grudzień
  • A. Romanowski

  - Rok 2015

  Kotwy wklejane należą do najbardziej popularnych metod montażu elementów konstrukcyjnych. Promieniowanie rentgenowskie częściowo umożliwia diagnostykę zespolenia lepiszcza z podłożem. W pracy przedstawiono wyniki analizy wpływu parametrów technicznych aparatów rentgenowskich na sposób i dokładność wykonania zdjęć diagnostycznych osadzenia kotew stalowych przy zastosowaniu lepiszcza syntetycznego