The Experts below are selected from a list of 321 Experts worldwide ranked by ideXlab platform
Amjad J Aref - One of the best experts on this subject based on the ideXlab platform.
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numerical simulation and seismic performance evaluation of Buried Pipelines rehabilitated with cured in place pipe liner under seismic wave propagation
Earthquake Engineering & Structural Dynamics, 2017Co-Authors: Zilan Zhong, Andre Filiatrault, Amjad J ArefAbstract:Summary The cured-in-place-pipe (CIPP) liner technology involves installation of flexible polymeric composite liners coated with thermosetting resin to the inner surfaces of existing Buried Pipelines. This innovative technology provides an efficient, economic, and environmentally friendly alternative for rehabilitation of structurally compromised underground Pipelines without expensive and disruptive excavation. However, the lack of analytical/numerical procedures to quantify the seismic performance of CIPP liner reinforced Pipelines remains a barrier to the seismic design and rehabilitation of underground Pipelines. This paper first develops an experimentally validated hysteretic model of ductile iron push-on joints, reinforced with one particular type of CIPP liner under repeated axial loading. A numerical procedure is then proposed to systematically assess the seismic performance and fragility of straight Buried Pipelines incorporating push-on joints and subjected to transient ground deformations. The numerical results indicate that CIPP liner-reinforced Pipelines exhibit favorable robust seismic performance with limited joint damage under high-intensity transient ground deformations. Copyright © 2016 John Wiley & Sons, Ltd.
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Numerical simulation and seismic performance evaluation of Buried Pipelines rehabilitated with cured‐in‐place‐pipe liner under seismic wave propagation
Earthquake Engineering & Structural Dynamics, 2016Co-Authors: Zilan Zhong, Andre Filiatrault, Amjad J ArefAbstract:Summary The cured-in-place-pipe (CIPP) liner technology involves installation of flexible polymeric composite liners coated with thermosetting resin to the inner surfaces of existing Buried Pipelines. This innovative technology provides an efficient, economic, and environmentally friendly alternative for rehabilitation of structurally compromised underground Pipelines without expensive and disruptive excavation. However, the lack of analytical/numerical procedures to quantify the seismic performance of CIPP liner reinforced Pipelines remains a barrier to the seismic design and rehabilitation of underground Pipelines. This paper first develops an experimentally validated hysteretic model of ductile iron push-on joints, reinforced with one particular type of CIPP liner under repeated axial loading. A numerical procedure is then proposed to systematically assess the seismic performance and fragility of straight Buried Pipelines incorporating push-on joints and subjected to transient ground deformations. The numerical results indicate that CIPP liner-reinforced Pipelines exhibit favorable robust seismic performance with limited joint damage under high-intensity transient ground deformations. Copyright © 2016 John Wiley & Sons, Ltd.
Radu Popescu - One of the best experts on this subject based on the ideXlab platform.
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Effect of Soil Restraint on the Buckling Response of Buried Pipelines
2010 8th International Pipeline Conference Volume 4, 2010Co-Authors: Hiva Mahdavi, Shawn Kenny, Ryan Phillips, Radu PopescuAbstract:Long-term large deformation geohazards can impose excessive deformation on a Buried pipeline. The ground displacement field may initiate pipeline deformation mechanisms that exceed design acceptance criteria with respect to serviceability requirements or ultimate limit states. Conventional engineering practice to define the peak moment or compressive strain limits for Buried Pipelines has been based on the pipeline mechanical response for in-air conditions. This methodology may be conservative as it ignores the soil effect that imposes geotechnical loads and restraint on Buried Pipelines. The importance of pipeline/soil interaction and load transfer mechanisms that may affect local buckling of Buried Pipelines is not well understood. The authors previously developed a new criterion for local buckling strain of Buried Pipelines in stiff clay through response surface methodology (RSM) [1, 2]. In this paper the new criterion was compared with a number of available in-air based criteria to study the effect of soil restraint on local buckling response of Buried Pipelines. This criterion predicted larger critical strain than selected in-air based criteria which shows the significant influence of soil presence. The supportive soil effect is discussed. The soil restraining effect increases the pipeline bending resistance, when the pipeline is subjected to large displacement-controlled ground deformation. A correlation between Palmer’s et al. (1990) conclusion [3] and current study’s results has been made. The critical strain increases as the ratio between axial thrust and pipeline bending stiffness decreases.Copyright © 2010 by ASME
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influence of geotechnical loads on local buckling behavior of Buried Pipelines
2008 7th International Pipeline Conference Volume 3, 2008Co-Authors: Hiva Mahdavi, Shawn Kenny, Ryan Phillips, Radu PopescuAbstract:Buried Pipelines can be subjected to differential ground movement events. The ground displacement field imposes geotechnical loads on the Buried pipeline and may initiate pipeline deformation mechanisms that exceed design acceptance criteria with respect to serviceability requirements or ultimate limit states. The conventional engineering approach to define the mechanical performance of Pipelines has been based on combined loading events for “in-air” conditions. This methodology is assumed to be overly conservative and ignores soil effects that imposes geotechnical loads and also provides restraint, on Buried Pipelines. The importance of pipeline/soil interaction and load transfer mechanisms that may affect local buckling of Buried Pipelines is not well understood. In this study a three-dimensional continuum finite element (FE) model, using the software package ABAQUS/Standard, was developed and calibrated based on large-scale tests on the local buckling of linepipe segments for in-air and Buried conditions. The effects of geotechnical boundary conditions on pipeline deformation mechanism and load carrying capacity were examined for a single small diameter pipeline with average diameter to thickness ratio and deep Buried condition. The calibrated model successfully reproduced the large-scale Buried test results in terms of the local buckling location, pipeline carrying load capacity, soil deformation and soil failure mechanism.© 2008 ASME
Zilan Zhong - One of the best experts on this subject based on the ideXlab platform.
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numerical simulation and seismic performance evaluation of Buried Pipelines rehabilitated with cured in place pipe liner under seismic wave propagation
Earthquake Engineering & Structural Dynamics, 2017Co-Authors: Zilan Zhong, Andre Filiatrault, Amjad J ArefAbstract:Summary The cured-in-place-pipe (CIPP) liner technology involves installation of flexible polymeric composite liners coated with thermosetting resin to the inner surfaces of existing Buried Pipelines. This innovative technology provides an efficient, economic, and environmentally friendly alternative for rehabilitation of structurally compromised underground Pipelines without expensive and disruptive excavation. However, the lack of analytical/numerical procedures to quantify the seismic performance of CIPP liner reinforced Pipelines remains a barrier to the seismic design and rehabilitation of underground Pipelines. This paper first develops an experimentally validated hysteretic model of ductile iron push-on joints, reinforced with one particular type of CIPP liner under repeated axial loading. A numerical procedure is then proposed to systematically assess the seismic performance and fragility of straight Buried Pipelines incorporating push-on joints and subjected to transient ground deformations. The numerical results indicate that CIPP liner-reinforced Pipelines exhibit favorable robust seismic performance with limited joint damage under high-intensity transient ground deformations. Copyright © 2016 John Wiley & Sons, Ltd.
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Numerical simulation and seismic performance evaluation of Buried Pipelines rehabilitated with cured‐in‐place‐pipe liner under seismic wave propagation
Earthquake Engineering & Structural Dynamics, 2016Co-Authors: Zilan Zhong, Andre Filiatrault, Amjad J ArefAbstract:Summary The cured-in-place-pipe (CIPP) liner technology involves installation of flexible polymeric composite liners coated with thermosetting resin to the inner surfaces of existing Buried Pipelines. This innovative technology provides an efficient, economic, and environmentally friendly alternative for rehabilitation of structurally compromised underground Pipelines without expensive and disruptive excavation. However, the lack of analytical/numerical procedures to quantify the seismic performance of CIPP liner reinforced Pipelines remains a barrier to the seismic design and rehabilitation of underground Pipelines. This paper first develops an experimentally validated hysteretic model of ductile iron push-on joints, reinforced with one particular type of CIPP liner under repeated axial loading. A numerical procedure is then proposed to systematically assess the seismic performance and fragility of straight Buried Pipelines incorporating push-on joints and subjected to transient ground deformations. The numerical results indicate that CIPP liner-reinforced Pipelines exhibit favorable robust seismic performance with limited joint damage under high-intensity transient ground deformations. Copyright © 2016 John Wiley & Sons, Ltd.
Hiva Mahdavi - One of the best experts on this subject based on the ideXlab platform.
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Effect of Soil Restraint on the Buckling Response of Buried Pipelines
2010 8th International Pipeline Conference Volume 4, 2010Co-Authors: Hiva Mahdavi, Shawn Kenny, Ryan Phillips, Radu PopescuAbstract:Long-term large deformation geohazards can impose excessive deformation on a Buried pipeline. The ground displacement field may initiate pipeline deformation mechanisms that exceed design acceptance criteria with respect to serviceability requirements or ultimate limit states. Conventional engineering practice to define the peak moment or compressive strain limits for Buried Pipelines has been based on the pipeline mechanical response for in-air conditions. This methodology may be conservative as it ignores the soil effect that imposes geotechnical loads and restraint on Buried Pipelines. The importance of pipeline/soil interaction and load transfer mechanisms that may affect local buckling of Buried Pipelines is not well understood. The authors previously developed a new criterion for local buckling strain of Buried Pipelines in stiff clay through response surface methodology (RSM) [1, 2]. In this paper the new criterion was compared with a number of available in-air based criteria to study the effect of soil restraint on local buckling response of Buried Pipelines. This criterion predicted larger critical strain than selected in-air based criteria which shows the significant influence of soil presence. The supportive soil effect is discussed. The soil restraining effect increases the pipeline bending resistance, when the pipeline is subjected to large displacement-controlled ground deformation. A correlation between Palmer’s et al. (1990) conclusion [3] and current study’s results has been made. The critical strain increases as the ratio between axial thrust and pipeline bending stiffness decreases.Copyright © 2010 by ASME
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influence of geotechnical loads on local buckling behavior of Buried Pipelines
2008 7th International Pipeline Conference Volume 3, 2008Co-Authors: Hiva Mahdavi, Shawn Kenny, Ryan Phillips, Radu PopescuAbstract:Buried Pipelines can be subjected to differential ground movement events. The ground displacement field imposes geotechnical loads on the Buried pipeline and may initiate pipeline deformation mechanisms that exceed design acceptance criteria with respect to serviceability requirements or ultimate limit states. The conventional engineering approach to define the mechanical performance of Pipelines has been based on combined loading events for “in-air” conditions. This methodology is assumed to be overly conservative and ignores soil effects that imposes geotechnical loads and also provides restraint, on Buried Pipelines. The importance of pipeline/soil interaction and load transfer mechanisms that may affect local buckling of Buried Pipelines is not well understood. In this study a three-dimensional continuum finite element (FE) model, using the software package ABAQUS/Standard, was developed and calibrated based on large-scale tests on the local buckling of linepipe segments for in-air and Buried conditions. The effects of geotechnical boundary conditions on pipeline deformation mechanism and load carrying capacity were examined for a single small diameter pipeline with average diameter to thickness ratio and deep Buried condition. The calibrated model successfully reproduced the large-scale Buried test results in terms of the local buckling location, pipeline carrying load capacity, soil deformation and soil failure mechanism.© 2008 ASME
Andre Filiatrault - One of the best experts on this subject based on the ideXlab platform.
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numerical simulation and seismic performance evaluation of Buried Pipelines rehabilitated with cured in place pipe liner under seismic wave propagation
Earthquake Engineering & Structural Dynamics, 2017Co-Authors: Zilan Zhong, Andre Filiatrault, Amjad J ArefAbstract:Summary The cured-in-place-pipe (CIPP) liner technology involves installation of flexible polymeric composite liners coated with thermosetting resin to the inner surfaces of existing Buried Pipelines. This innovative technology provides an efficient, economic, and environmentally friendly alternative for rehabilitation of structurally compromised underground Pipelines without expensive and disruptive excavation. However, the lack of analytical/numerical procedures to quantify the seismic performance of CIPP liner reinforced Pipelines remains a barrier to the seismic design and rehabilitation of underground Pipelines. This paper first develops an experimentally validated hysteretic model of ductile iron push-on joints, reinforced with one particular type of CIPP liner under repeated axial loading. A numerical procedure is then proposed to systematically assess the seismic performance and fragility of straight Buried Pipelines incorporating push-on joints and subjected to transient ground deformations. The numerical results indicate that CIPP liner-reinforced Pipelines exhibit favorable robust seismic performance with limited joint damage under high-intensity transient ground deformations. Copyright © 2016 John Wiley & Sons, Ltd.
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Numerical simulation and seismic performance evaluation of Buried Pipelines rehabilitated with cured‐in‐place‐pipe liner under seismic wave propagation
Earthquake Engineering & Structural Dynamics, 2016Co-Authors: Zilan Zhong, Andre Filiatrault, Amjad J ArefAbstract:Summary The cured-in-place-pipe (CIPP) liner technology involves installation of flexible polymeric composite liners coated with thermosetting resin to the inner surfaces of existing Buried Pipelines. This innovative technology provides an efficient, economic, and environmentally friendly alternative for rehabilitation of structurally compromised underground Pipelines without expensive and disruptive excavation. However, the lack of analytical/numerical procedures to quantify the seismic performance of CIPP liner reinforced Pipelines remains a barrier to the seismic design and rehabilitation of underground Pipelines. This paper first develops an experimentally validated hysteretic model of ductile iron push-on joints, reinforced with one particular type of CIPP liner under repeated axial loading. A numerical procedure is then proposed to systematically assess the seismic performance and fragility of straight Buried Pipelines incorporating push-on joints and subjected to transient ground deformations. The numerical results indicate that CIPP liner-reinforced Pipelines exhibit favorable robust seismic performance with limited joint damage under high-intensity transient ground deformations. Copyright © 2016 John Wiley & Sons, Ltd.
