The Experts below are selected from a list of 94662 Experts worldwide ranked by ideXlab platform
Thomas Vogel - One of the best experts on this subject based on the ideXlab platform.
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Classification of the Damage Condition of preloaded reinforced
Construction and Building Materials, 2010Co-Authors: Georg Karl Kocur, Thomas VogelAbstract:A parameter-based acoustic emission (AE) technique is applied to AE signals acquired in physical experiments carried out on a series of preDamaged reinforced concrete slabs. Three reinforced concrete slabs without shear reinforcement with dimensions of 1.50 I 1.50 I 0.23 m are subjected to cycles of a concentrated centric load with increasing peak values up to failure. The slabs had been previously exposed to impact loads in rockfall experiments and exhibit an unknown Damage Condition yet to be determined. Acoustic emissions are recorded during the loading and unloading cycles and evaluated. An analysis of load ratio and calm ratio associated with the Kaiser effect is performed. Damage classification is carried out successfully. Definitions of load ratio and calm ratio are reconsidered and specified. A static preloading of the slabs is approximated. The relationship between cracking process, failure mechanism and the acoustic emissions that occur is described and discussed. (A) Reprinted with permission from Elsevier.
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classification of the Damage Condition of preloaded reinforced concrete slabs using parameter based acoustic emission analysis
Construction and Building Materials, 2010Co-Authors: Georg Karl Kocur, Thomas VogelAbstract:Abstract A parameter-based acoustic emission (AE) technique is applied to AE signals acquired in physical experiments carried out on a series of preDamaged reinforced concrete slabs. Three reinforced concrete slabs without shear reinforcement with dimensions of 1.50 × 1.50 × 0.23 m are subjected to cycles of a concentrated centric load with increasing peak values up to failure. The slabs had been previously exposed to impact loads in rockfall experiments and exhibit an unknown Damage Condition yet to be determined. Acoustic emissions are recorded during the loading and unloading cycles and evaluated. An analysis of load ratio and calm ratio associated with the Kaiser effect is performed. Damage classification is carried out successfully. Definitions of load ratio and calm ratio are reconsidered and specified. A static preloading of the slabs is approximated. The relationship between cracking process, failure mechanism and the acoustic emissions that occur is described and discussed.
Georg Karl Kocur - One of the best experts on this subject based on the ideXlab platform.
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Classification of the Damage Condition of preloaded reinforced
Construction and Building Materials, 2010Co-Authors: Georg Karl Kocur, Thomas VogelAbstract:A parameter-based acoustic emission (AE) technique is applied to AE signals acquired in physical experiments carried out on a series of preDamaged reinforced concrete slabs. Three reinforced concrete slabs without shear reinforcement with dimensions of 1.50 I 1.50 I 0.23 m are subjected to cycles of a concentrated centric load with increasing peak values up to failure. The slabs had been previously exposed to impact loads in rockfall experiments and exhibit an unknown Damage Condition yet to be determined. Acoustic emissions are recorded during the loading and unloading cycles and evaluated. An analysis of load ratio and calm ratio associated with the Kaiser effect is performed. Damage classification is carried out successfully. Definitions of load ratio and calm ratio are reconsidered and specified. A static preloading of the slabs is approximated. The relationship between cracking process, failure mechanism and the acoustic emissions that occur is described and discussed. (A) Reprinted with permission from Elsevier.
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classification of the Damage Condition of preloaded reinforced concrete slabs using parameter based acoustic emission analysis
Construction and Building Materials, 2010Co-Authors: Georg Karl Kocur, Thomas VogelAbstract:Abstract A parameter-based acoustic emission (AE) technique is applied to AE signals acquired in physical experiments carried out on a series of preDamaged reinforced concrete slabs. Three reinforced concrete slabs without shear reinforcement with dimensions of 1.50 × 1.50 × 0.23 m are subjected to cycles of a concentrated centric load with increasing peak values up to failure. The slabs had been previously exposed to impact loads in rockfall experiments and exhibit an unknown Damage Condition yet to be determined. Acoustic emissions are recorded during the loading and unloading cycles and evaluated. An analysis of load ratio and calm ratio associated with the Kaiser effect is performed. Damage classification is carried out successfully. Definitions of load ratio and calm ratio are reconsidered and specified. A static preloading of the slabs is approximated. The relationship between cracking process, failure mechanism and the acoustic emissions that occur is described and discussed.
Elizabeth J. Cross - One of the best experts on this subject based on the ideXlab platform.
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Assessing the Likelihood of Damage at the Start of a Structural Health Monitoring Campaign
Structural Health Monitoring 2019, 2019Co-Authors: Matthew R. Jones, T.j. Rogers, Nikolaos Dervilis, Keith Worden, Elizabeth J. CrossAbstract:In many structures that engineers are interested in monitoring the Damage state of, the infeasibility of collecting data in each possible Damage Condition makes unsupervised learning algorithms an appealing approach. However, this learning method generally relies on access to an initial data set being representative of the unDamaged behaviour of the structure, which often is not available, particularly when a monitoring system has been retrofitted to an operational structure. To overcome this issue, arbitrarily selecting data over an initial period of monitoring to represent the unDamaged/normal Condition is a common method to adopt, however, there are a variety of limitations with this approach, such as uncertainty in the Damage Condition of the structure prior to the installation of the monitoring system, in addition to the length of the required training period. It is therefore desirable to be able to infer a structure’s Damage Condition at the start of a monitoring period, explored here through the application of the Dirichlet Process Gaussian Mixture Model, a clustering method based on a Bayesian adaptation of the traditional Gaussian Mixture Model. In the context of Condition assessment for wind turbine components, this paper combines the application of prior knowledge and population-based SHM in conjunction with this clustering method to provide a framework to assess the likelihood of Damage at the start of a monitoring campaign.
Zhang Shilian - One of the best experts on this subject based on the ideXlab platform.
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ultimate strength analysis of two types of strength deck under large deformation Damage Condition
Ship Science and Technology, 2010Co-Authors: Zhang ShilianAbstract:A study on the longitudinal ultimate strength of warship with different types of strength deck under large deformation Damage Condition is presented in this paper,using ABAQUS nonlinear FEM tools.An impact load is applied to obtain the large deformation Damage Conditions,which work as the initial Conditions in the ultimate strength analysis process.The result shows that,compared with general type of strength deck,strength deck stiffened by box girders has much better performance on longitudinal ultimate strength under large deformation Damage Condition.
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ultimate strength analysis of two types of strength deck under large deformation Damage Condition
Ship Science and Technology, 2010Co-Authors: Zhang ShilianAbstract:A study on the longitudinal ultimate strength of warship with different types of strength deck under large deformation Damage Condition is presented in this paper,using ABAQUS nonlinear FEM tools.An impact load is applied to obtain the large deformation Damage Conditions,which work as the initial Conditions in the ultimate strength analysis process.The result shows that,compared with general type of strength deck,strength deck stiffened by box girders has much better performance on longitudinal ultimate strength under large deformation Damage Condition.
Pan Chun-ping - One of the best experts on this subject based on the ideXlab platform.
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Damage Condition of Overhead Transmission Lines in Guangdong Power Grid Caused by Icing Disaster in 2008 and Analysis on Key Impacting Factors
Power system technology, 2009Co-Authors: Pan Chun-pingAbstract:Due to severe icing disaster in the beginning of the year 2008, the line facilities of Guangdong power grid sustained heavy losses. In this paper the Damage Condition of overhead transmission lines, the rush repair of Damaged facilities and recovery of power supply are presented. The Damage Conditions and causations of facilities such as Damage of transmission tower, breaking of conductors and ground wires, Damage of fittings, breaking and falling of insulator strings, Damage of communication optical fibers, are analyzed; the key impacting factors, such as the designed ice zone, landform, altitude elevation, tower types, tower Damage types, Damage types of conductors and ground wires, longitudinal load and vertical load and so on, are researched. Based on above-mentioned analysis and research, following recommendations are put forward: different de-icing measures and reinforcement of key components of transmission lines should be adopted, the intensity of composition parts for transmission line should be reasonably matched to decrease the Damage of transmission lines caused by icing disaster as possible.
