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N Meyer - One of the best experts on this subject based on the ideXlab platform.

  • Interaktionsverhalten von Geokunststoff und Boden unter statischen und zyklischen Beanspruchungen / Interaction behaviour of geosynthetics and soil under static and cyclic loadings
    Bautechnik, 2006
    Co-Authors: A Nernheim, N Meyer
    Abstract:

    Geokunststoffe werden beim Einsatz in Stuetzkonstruktionen, Erdfallueberbrueckungen oder Brueckenwiderlagern neben statischen Einwirkungen auch zyklisch-dynamischen Einwirkungen aus Verkehr, Maschinen oder Baubetrieb ausgesetzt. Im Rahmen des Nachweises der inneren Standsicherheit werden in diesen Konstruktionen detaillierte Kenntnisse des Interaktionsverhaltens zwischen Erdstoff und Bewehrungsmaterial im Verankerungsbereich gefordert. Zum Verhalten unter zyklisch-dynamischen Beanspruchungen liegen aber bisher nur unzureichende Erfahrungen vor. Im vorliegenden Beitrag werden Informationen zur zyklischen Beanspruchungssituation von Bewehrungselementen gegeben, ein Versuchskonzept zur Untersuchung der Problematik im Auszugsversuch vorgestellt und wesentliche Einflussparameter extrahiert. Aus den vorgestellten Versuchsergebnissen werden eine Methodik zur Ermittlung von Verformungen aus zyklischer Beanspruchung und ein allgemeingueltiges Konzept zur Bemessung des Verankerungsbereiches abgeleitet. (A) ABSTRACT IN ENGLISH: When used in reinforced structures, bridging of voids or abutments geosynthetics are exposed to static and cyclic loadings from traffic, machines and construction work. For the proof of internal stability in these structures detailed knowledge of the interaction behaviour between the geosynthetic and the surrounding soil in the Anchorage Area is required. No sufficient experience of the behaviour under cyclic loadings is available at the moment. In this contribution information on cyclic loadings of reinforcing elements is given, a testing framework for the examination of this topic is presented and key parameters are extracted. A method for the determination of cyclic displacements and a universal design concept for the Anchorage Area of geosynthetics are derived from the presented test results. (A)

  • Interaktionsverhalten von Geokunststoff und Boden unter statischen und zyklischen Beanspruchungen
    Bautechnik, 2006
    Co-Authors: A Nernheim, N Meyer
    Abstract:

    Geokunststoffe werden beim Einsatz in Stutzkonstruktionen, Erdfalluberbruckungen oder Bruckenwiderlagern neben statischen Einwirkungen auch zyklisch-dynamischen Einwirkungen aus Verkehr, Maschinen oder Baubetrieb ausgesetzt. Im Rahmen des Nachweises der inneren Standsicherheit werden in diesen Konstruktionen detaillierte Kenntnisse des Interaktionsverhaltens zwischen Erdstoff und Bewehrungsmaterial im Verankerungsbereich gefordert. Zum Verhalten unter zyklisch-dynamischen Beanspruchungen liegen aber bisher nur unzureichende Erfahrungen vor. In diesem Beitrag werden Informationen zur zyklischen Beanspruchungssituation von Bewehrungselementen gegeben, ein Versuchskonzept zur Untersuchung der Problematik im Auszugsversuch vorgestellt und wesentliche Einflusparameter extrahiert. Aus den vorgestellten Versuchsergebnissen werden eine Methodik zur Ermittlung von Verformungen aus zyklischer Beanspruchung und ein allgemeingultiges Konzept zur Bemessung des Verankerungsbereiches abgeleitet. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) Interaction behaviour of geosynthetics and soil under static and cyclic loadings. When used in reinforced structures, bridging of voids or abutments geosynthetics are exposed to static and cyclic loadings from traffic, machines and construction work. For the proof of internal stability in these structures detailed knowledge of the interaction behaviour between the geosynthetic and the surrounding soil in the Anchorage Area is required. No sufficient experience of the behaviour under cyclic loadings is available at the moment. In this contribution information on cyclic loadings of reinforcing elements is given, a testing framework for the examination of this topic is presented and key parameters are extracted. A method for the determination of cyclic displacements and a universal design concept for the Anchorage Area of geosynthetics are derived from the presented test results.

A Nernheim - One of the best experts on this subject based on the ideXlab platform.

  • Interaktionsverhalten von Geokunststoff und Boden unter statischen und zyklischen Beanspruchungen / Interaction behaviour of geosynthetics and soil under static and cyclic loadings
    Bautechnik, 2006
    Co-Authors: A Nernheim, N Meyer
    Abstract:

    Geokunststoffe werden beim Einsatz in Stuetzkonstruktionen, Erdfallueberbrueckungen oder Brueckenwiderlagern neben statischen Einwirkungen auch zyklisch-dynamischen Einwirkungen aus Verkehr, Maschinen oder Baubetrieb ausgesetzt. Im Rahmen des Nachweises der inneren Standsicherheit werden in diesen Konstruktionen detaillierte Kenntnisse des Interaktionsverhaltens zwischen Erdstoff und Bewehrungsmaterial im Verankerungsbereich gefordert. Zum Verhalten unter zyklisch-dynamischen Beanspruchungen liegen aber bisher nur unzureichende Erfahrungen vor. Im vorliegenden Beitrag werden Informationen zur zyklischen Beanspruchungssituation von Bewehrungselementen gegeben, ein Versuchskonzept zur Untersuchung der Problematik im Auszugsversuch vorgestellt und wesentliche Einflussparameter extrahiert. Aus den vorgestellten Versuchsergebnissen werden eine Methodik zur Ermittlung von Verformungen aus zyklischer Beanspruchung und ein allgemeingueltiges Konzept zur Bemessung des Verankerungsbereiches abgeleitet. (A) ABSTRACT IN ENGLISH: When used in reinforced structures, bridging of voids or abutments geosynthetics are exposed to static and cyclic loadings from traffic, machines and construction work. For the proof of internal stability in these structures detailed knowledge of the interaction behaviour between the geosynthetic and the surrounding soil in the Anchorage Area is required. No sufficient experience of the behaviour under cyclic loadings is available at the moment. In this contribution information on cyclic loadings of reinforcing elements is given, a testing framework for the examination of this topic is presented and key parameters are extracted. A method for the determination of cyclic displacements and a universal design concept for the Anchorage Area of geosynthetics are derived from the presented test results. (A)

  • Interaktionsverhalten von Geokunststoff und Boden unter statischen und zyklischen Beanspruchungen
    Bautechnik, 2006
    Co-Authors: A Nernheim, N Meyer
    Abstract:

    Geokunststoffe werden beim Einsatz in Stutzkonstruktionen, Erdfalluberbruckungen oder Bruckenwiderlagern neben statischen Einwirkungen auch zyklisch-dynamischen Einwirkungen aus Verkehr, Maschinen oder Baubetrieb ausgesetzt. Im Rahmen des Nachweises der inneren Standsicherheit werden in diesen Konstruktionen detaillierte Kenntnisse des Interaktionsverhaltens zwischen Erdstoff und Bewehrungsmaterial im Verankerungsbereich gefordert. Zum Verhalten unter zyklisch-dynamischen Beanspruchungen liegen aber bisher nur unzureichende Erfahrungen vor. In diesem Beitrag werden Informationen zur zyklischen Beanspruchungssituation von Bewehrungselementen gegeben, ein Versuchskonzept zur Untersuchung der Problematik im Auszugsversuch vorgestellt und wesentliche Einflusparameter extrahiert. Aus den vorgestellten Versuchsergebnissen werden eine Methodik zur Ermittlung von Verformungen aus zyklischer Beanspruchung und ein allgemeingultiges Konzept zur Bemessung des Verankerungsbereiches abgeleitet. (© 2006 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) Interaction behaviour of geosynthetics and soil under static and cyclic loadings. When used in reinforced structures, bridging of voids or abutments geosynthetics are exposed to static and cyclic loadings from traffic, machines and construction work. For the proof of internal stability in these structures detailed knowledge of the interaction behaviour between the geosynthetic and the surrounding soil in the Anchorage Area is required. No sufficient experience of the behaviour under cyclic loadings is available at the moment. In this contribution information on cyclic loadings of reinforcing elements is given, a testing framework for the examination of this topic is presented and key parameters are extracted. A method for the determination of cyclic displacements and a universal design concept for the Anchorage Area of geosynthetics are derived from the presented test results.

Liu Xiao-yu - One of the best experts on this subject based on the ideXlab platform.

  • Research on Anti-collision for RFID in Port Intelligent Scheduling System
    Journal of Hebei United University, 2013
    Co-Authors: Liu Xiao-yu
    Abstract:

    In the port intelligent scheduling system,RFID is used to the ship status recognition.This paper classifies the port environment,discusses ALOHA algorithm and Binary tree search algorithm along with algorithms which improved from them and find an adaptive anti-collision algorithm of the port intelligent scheduling system directing to the different situations of sea-route and Anchorage Area.

  • Release Welding Residual Stress in Anchorage Area Using Ultrasonic Impact
    Journal of Shanghai University, 2008
    Co-Authors: Liu Xiao-yu
    Abstract:

    To solve problems in anchor plate of long-span cable-stayed bridge such as dense welds,thick connecting plates,and high and unknown distribution of welding residual stress,three full-scale ratio models are proposed.These are applied to cable-beam connection of Anchorage Area of Chongqing Jiangjin Guanyinyan Yangtze River Bridge.Welding residual stress was tested,and ultrasonic impact imposed on welds of the models.Ultrasonic impact can make weld toe as the center of a certain region producing sufficient deep surface of plastic deformation.It effectively improves welds and baseplates exterior shape of the transitional zone,and reduces stress concentration in the welds.Test results show that there is significant welding residual stress in the Anchorage Areas of tensile anchor plates,and ultrasonic impact can effectively reduce,even release,welding residual stress and improve the status of stress of welds.Ultrasonic impact can make the stress distribution in the welds more uniform,ensuring safety of the cable-beam connection of Anchorage Area.In conclusion,ultrasonic impact is an effective method for solving the welding residual stress problem.

J.b. Salisbury - One of the best experts on this subject based on the ideXlab platform.

  • Photogrammetric digital surface models and orthoimagery of EauClaire Place, December 5th, 2018
    2020
    Co-Authors: J.b. Salisbury, A.m. Herbst, Katreen Wikstrom Jones
    Abstract:

    The State of Alaska Division of Geological & Geophysical Surveys (DGGS) produced digital surface models (DSMs) and orthorectified aerial imagery (orthoimagery) over selected locations in the greater Anchorage Area following the Mw 7.1 November 30, 2018, Anchorage earthquake. We selected Areas of interest (AOIs) based on initial damage reports from the Alaska Department of Transportation & Public Facilities (DOT&PF) and the United States Geological Survey (USGS) in order to document earthquake effects. Aerial photographs collected December 5-6, 2018, were processed using Structure-from-Motion (SfM) photogrammetric techniques to create sub-meter DSMs and orthoimagery. This digital data set covers EauClaire Place and was collected on December 5, 2018. These data document ground conditions immediately following the 2018 Mw 7.1 Anchorage earthquake. For the purposes of open access to elevation and orthoimagery data sets throughout Alaska, this collection is being released as a Raw Data File with an open end-user license. The data and the data acquisition report are available from the DGGS website: https://elevation.alaska.gov/, http://doi.org/10.14509/30273.

  • Photogrammetric digital surface models and orthoimagery of Mackenzie Road, December 5, 2018
    2020
    Co-Authors: J.b. Salisbury
    Abstract:

    The State of Alaska Division of Geological & Geophysical Surveys (DGGS) produced digital surface models (DSMs) and orthorectified aerial imagery (orthoimagery) over selected locations in the greater Anchorage Area following the Mw 7.1 November 30, 2018, Anchorage earthquake. We selected Areas of interest (AOIs) based on initial damage reports from the Alaska Department of Transportation & Public Facilities (DOT&PF) and the United States Geological Survey (USGS) in order to document earthquake effects. Aerial photographs collected December 5-6, 2018, were processed using Structure-from-Motion (SfM) photogrammetric techniques to create sub-meter DSMs and orthoimagery. This digital data set covers MacKenzie Road and was collected on December 5, 2018. These data document ground conditions immediately following the 2018 Mw 7.1 Anchorage earthquake. For the purposes of open access to elevation and orthoimagery data sets throughout Alaska, this collection is being released as a Raw Data File with an open end-user license. The data and the data acquisition report are available from the DGGS website: https://elevation.alaska.gov/, http://doi.org/10.14509/30277.

  • Photogrammetric digital surface models and orthoimagery of Pittman Road, December 5th, 2018
    2020
    Co-Authors: J.b. Salisbury, A.m. Herbst, Katreen Wikstrom Jones
    Abstract:

    The State of Alaska Division of Geological & Geophysical Surveys (DGGS) produced digital surface models (DSMs) and orthorectified aerial imagery (orthoimagery) over selected locations in the greater Anchorage Area following the Mw 7.1 November 30, 2018, Anchorage earthquake. We selected Areas of interest (AOIs) based on initial damage reports from the Alaska Department of Transportation & Public Facilities (DOT&PF) and the United States Geological Survey (USGS) in order to document earthquake effects. Aerial photographs collected December 5-6, 2018, were processed using Structure-from-Motion (SfM) photogrammetric techniques to create sub-meter DSMs and orthoimagery. This digital data set covers Pittman Road and was collected on December 5, 2018. These data document ground conditions immediately following the 2018 Mw 7.1 Anchorage earthquake. For the purposes of open access to elevation and orthoimagery data sets throughout Alaska, this collection is being released as a Raw Data File with an open end-user license. The data and the data acquisition report are available from the DGGS website: https://elevation.alaska.gov/, http://doi.org/10.14509/30279.

  • Photogrammetric digital surface models and orthoimagery of Vine Road, December 5th, 2018
    2020
    Co-Authors: J.b. Salisbury, A.m. Herbst, Katreen Wikstrom Jones
    Abstract:

    The State of Alaska Division of Geological & Geophysical Surveys (DGGS) produced digital surface models (DSMs) and orthorectified aerial imagery (orthoimagery) over selected locations in the greater Anchorage Area following the Mw 7.1 November 30, 2018, Anchorage earthquake. We selected Areas of interest (AOIs) based on initial damage reports from the Alaska Department of Transportation & Public Facilities (DOT&PF) and the United States Geological Survey (USGS) in order to document earthquake effects. Aerial photographs collected December 5-6, 2018, were processed using Structure-from-Motion (SfM) photogrammetric techniques to create sub-meter DSMs and orthoimagery. This digital data set covers Vine Road and was collected on December 5, 2018. These data document ground conditions immediately following the 2018 Mw 7.1 Anchorage earthquake. For the purposes of open access to elevation and orthoimagery data sets throughout Alaska, this collection is being released as a Raw Data File with an open end-user license. The data and the data acquisition report are available from the DGGS website: https://elevation.alaska.gov/, http://doi.org/10.14509/30283.

  • Photogrammetric digital surface models and orthoimagery of Westchester Lagoon, December 5th, 2018
    2020
    Co-Authors: J.b. Salisbury, A.m. Herbst, Katreen Wikstrom Jones
    Abstract:

    The State of Alaska Division of Geological & Geophysical Surveys (DGGS) produced digital surface models (DSMs) and orthorectified aerial imagery (orthoimagery) over selected locations in the greater Anchorage Area following the Mw 7.1 November 30, 2018, Anchorage earthquake. We selected Areas of interest (AOIs) based on initial damage reports from the Alaska Department of Transportation & Public Facilities (DOT&PF) and the United States Geological Survey (USGS) in order to document earthquake effects. Aerial photographs collected December 5-6, 2018, were processed using Structure-from-Motion (SfM) photogrammetric techniques to create sub-meter DSMs and orthoimagery. This digital data set covers Westchester Lagoon and was collected on December 5, 2018. These data document ground conditions immediately following the 2018 Mw 7.1 Anchorage earthquake. For the purposes of open access to elevation and orthoimagery data sets throughout Alaska, this collection is being released as a Raw Data File with an open end-user license. The data and the data acquisition report are available from the DGGS website: https://elevation.alaska.gov/, http://doi.org/10.14509/30284.

Xiao Yu Liu - One of the best experts on this subject based on the ideXlab platform.

  • Study on the Welding Residual Stress in Anchorage Area of Steel Bridge
    Advanced Materials Research, 2011
    Co-Authors: Xiao Yu Liu
    Abstract:

    Aimed at the problems such as welding stress concentration and especially irregular distribution of welding residual stress for Anchorage Area in cable-stayed bridges, three full-scale beam-anchor-plate connection models of Chongqing Jiangjin Guanyinyan Yangtse Rive bridge were made and the tests were performed. The purposes of the tests and study were to investigate the distribution of welding residual stress in Anchorage Area and moreover to find a way to reduce and eliminate the welding residual tensile stresses. For this reason ultrasonic impact was imposed on the main welds of the three models. The result of the experiment showed that there were quite considerable welding residual stresses in the Anchorage Area. It also displayed that the ultrasonic impact was able to effectively decrease and even release the welding residual tensile stress. The ultrasonic impact was able to not only improve the adverse state of the welds stress but also make the distribution of the welds stress smoother. The ultrasonic impact is an effective and feasible method to decrease and eliminate welding residual stress and thereby improve the fatigue strength of welds for the steel bridge.