The Experts below are selected from a list of 288 Experts worldwide ranked by ideXlab platform
Michael S. Sondag - One of the best experts on this subject based on the ideXlab platform.
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Minnesota Department of Transportation Overload Field Tests of Standard and Standard Installation Direct Design Reinforced Concrete Pipe Installations
Transportation Research Record, 1999Co-Authors: James J Hill, John M. Kurdziel, C R Nelson, James A. Nystrom, Michael S. SondagAbstract:The design, manufacture, and installation of Concrete Pipe have changed significantly under the new standard installation direct design (SIDD) beddings. The Minnesota Department of Transportation (MnDOT) initiated a research project to evaluate the benefits of these new installations in conjunction with state-of-the-art means for determining soil stiffness and, thereby, its effect on Concrete Pipe performance. The methodology used to develop the test installations, how the Pipes were instrumented, and the significance of soil stiffness relative to soil density is described. The performance of Concrete Pipe under both the SIDD and MnDOT standard installations, the resulting variability found with specific soils, and recommendations for Concrete Pipe design and installation are also addressed.
Ra Parmelee - One of the best experts on this subject based on the ideXlab platform.
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COMPUTER-AIDED STRUCTURAL ANALYSIS AND DESIGN OF Concrete Pipe
Concrete Pipe and The Soil-Structure System, 1Co-Authors: Th Wenzel, Ra ParmeleeAbstract:This paper describes the development of a finite-element computer program to simulate the structural behavior of a buried Concrete Pipe. The influence of the soil-structure interaction phenomenon is approximated by using appropriate material properties for the bedding and backfill, and by employing empirical hinging mechanisms which enable simulation of the progressive cracking behavior in the model of the Concrete Pipe. A second approximation, in which the Pipe is represented as a linear frame, is introduced for the calculation of internal stress resultants. Various iteration techniques are employed to ensure deformation compatibility between the two Pipe models. The results from full-scale experimentation are then used to validate the analytical models. This model of the soil-Pipe system was combined with appropriate serviceability and ultimate strength design criteria for reinforced Concrete Pipe to produce a comprehensive computer program for the design of buried Concrete Pipe. The resulting program, entitled NUPipe, accounts for nonlinear soil-structure interaction, and permits the engineer to obtain the structural design of a given size Pipe having a specified fill height and installed in any manner (that is, arbitrary bedding or backfill procedures or both). The applicability of the new design method is demonstrated by designing various installations. The required steel areas for these installations are compared with those obtained by use of the current design method, and the differences are discussed.
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A Study of Soil-Structure Interaction of Buried Concrete Pipe
Concrete Pipe and The Soil-Structure System, 1Co-Authors: Ra ParmeleeAbstract:A long-range research project was undertaken by the American Concrete Pipe Association to investigate the nature of the loading imposed on a Concrete Pipe when it is buried at a significant depth below the surface of the ground. The project consisted of an experimental and an analytical phase. The data from the experimental programs were used to assist in the development of a comprehensive finite-element program which can simulate the behavior of buried Pipelines. This paper presents an overview of the entire project and describes in detail the structural aspects of the experimental phases of the research program.
James J Hill - One of the best experts on this subject based on the ideXlab platform.
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Minnesota Department of Transportation Overload Field Tests of Standard and Standard Installation Direct Design Reinforced Concrete Pipe Installations
Transportation Research Record, 1999Co-Authors: James J Hill, John M. Kurdziel, C R Nelson, James A. Nystrom, Michael S. SondagAbstract:The design, manufacture, and installation of Concrete Pipe have changed significantly under the new standard installation direct design (SIDD) beddings. The Minnesota Department of Transportation (MnDOT) initiated a research project to evaluate the benefits of these new installations in conjunction with state-of-the-art means for determining soil stiffness and, thereby, its effect on Concrete Pipe performance. The methodology used to develop the test installations, how the Pipes were instrumented, and the significance of soil stiffness relative to soil density is described. The performance of Concrete Pipe under both the SIDD and MnDOT standard installations, the resulting variability found with specific soils, and recommendations for Concrete Pipe design and installation are also addressed.
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EVALUATION OF NEW INSTALLATIONS FOR Concrete Pipe
1998Co-Authors: James J Hill, John M. Kurdziel, C R Nelson, J A NystromAbstract:The Minnesota Department of Transportation is investigating the use of recent technological developments to change their traditional methods used to design and install Concrete Pipe. New methods of soil structure analysis, installation details, and the ability to directly measure soil properties with modern methods have made this advancement practical. The need for change is being forced by economic issues. New Pipe installations must be reliable, less labor intense, safer during construction, and use native soil materials as much as possible for support of the Pipe. At the same time, there has been a shift of the responsibility for the quality of construction from the owner to the contractor. Certification of conformance to specifications will become more common as on-site inspection becomes less common. This idea recognizes that when the owner sets performance criteria, it is more efficient for the contractor to determine how to meet those criteria. This paper is the first of a series to provide an analytical means for comparing projected design loads and reaction forces for new Concrete Pipe standard installations with actual construction practices.
C R Nelson - One of the best experts on this subject based on the ideXlab platform.
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Minnesota Department of Transportation Overload Field Tests of Standard and Standard Installation Direct Design Reinforced Concrete Pipe Installations
Transportation Research Record, 1999Co-Authors: James J Hill, John M. Kurdziel, C R Nelson, James A. Nystrom, Michael S. SondagAbstract:The design, manufacture, and installation of Concrete Pipe have changed significantly under the new standard installation direct design (SIDD) beddings. The Minnesota Department of Transportation (MnDOT) initiated a research project to evaluate the benefits of these new installations in conjunction with state-of-the-art means for determining soil stiffness and, thereby, its effect on Concrete Pipe performance. The methodology used to develop the test installations, how the Pipes were instrumented, and the significance of soil stiffness relative to soil density is described. The performance of Concrete Pipe under both the SIDD and MnDOT standard installations, the resulting variability found with specific soils, and recommendations for Concrete Pipe design and installation are also addressed.
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EVALUATION OF NEW INSTALLATIONS FOR Concrete Pipe
1998Co-Authors: James J Hill, John M. Kurdziel, C R Nelson, J A NystromAbstract:The Minnesota Department of Transportation is investigating the use of recent technological developments to change their traditional methods used to design and install Concrete Pipe. New methods of soil structure analysis, installation details, and the ability to directly measure soil properties with modern methods have made this advancement practical. The need for change is being forced by economic issues. New Pipe installations must be reliable, less labor intense, safer during construction, and use native soil materials as much as possible for support of the Pipe. At the same time, there has been a shift of the responsibility for the quality of construction from the owner to the contractor. Certification of conformance to specifications will become more common as on-site inspection becomes less common. This idea recognizes that when the owner sets performance criteria, it is more efficient for the contractor to determine how to meet those criteria. This paper is the first of a series to provide an analytical means for comparing projected design loads and reaction forces for new Concrete Pipe standard installations with actual construction practices.
John M. Kurdziel - One of the best experts on this subject based on the ideXlab platform.
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Minnesota Department of Transportation Overload Field Tests of Standard and Standard Installation Direct Design Reinforced Concrete Pipe Installations
Transportation Research Record, 1999Co-Authors: James J Hill, John M. Kurdziel, C R Nelson, James A. Nystrom, Michael S. SondagAbstract:The design, manufacture, and installation of Concrete Pipe have changed significantly under the new standard installation direct design (SIDD) beddings. The Minnesota Department of Transportation (MnDOT) initiated a research project to evaluate the benefits of these new installations in conjunction with state-of-the-art means for determining soil stiffness and, thereby, its effect on Concrete Pipe performance. The methodology used to develop the test installations, how the Pipes were instrumented, and the significance of soil stiffness relative to soil density is described. The performance of Concrete Pipe under both the SIDD and MnDOT standard installations, the resulting variability found with specific soils, and recommendations for Concrete Pipe design and installation are also addressed.
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EVALUATION OF NEW INSTALLATIONS FOR Concrete Pipe
1998Co-Authors: James J Hill, John M. Kurdziel, C R Nelson, J A NystromAbstract:The Minnesota Department of Transportation is investigating the use of recent technological developments to change their traditional methods used to design and install Concrete Pipe. New methods of soil structure analysis, installation details, and the ability to directly measure soil properties with modern methods have made this advancement practical. The need for change is being forced by economic issues. New Pipe installations must be reliable, less labor intense, safer during construction, and use native soil materials as much as possible for support of the Pipe. At the same time, there has been a shift of the responsibility for the quality of construction from the owner to the contractor. Certification of conformance to specifications will become more common as on-site inspection becomes less common. This idea recognizes that when the owner sets performance criteria, it is more efficient for the contractor to determine how to meet those criteria. This paper is the first of a series to provide an analytical means for comparing projected design loads and reaction forces for new Concrete Pipe standard installations with actual construction practices.