Author:
Publisher:
ISBN:
Category : Culverts
Languages : en
Pages : 200
Book Description
Questionnaires were sent to transportation agencies in all 50 states in the U.S., to Puerto Rico, and all provinces in Canada asking about their experiences with uplift problems of - corrugated metal pipe (CMP). Responses were received from 52 agencies who reported 9 failures within the last 5 years. Some agencies also provided design standards for tiedowns to resist uplift. There was a wide variety in restraining forces used; for example for a pipe 6 feet in diameter, the resisting force ranged from 10 kips to 66 kips. These responses verified the earlier conclusion based on responses from Iowa county engineers that a potential uplift danger exists.when end restraint is not provided for CMP and that existing designs have an unclear theoretical or experimental basis. In an effort to develop more rational design standards, the longitudinal stiffness of three CMP ranging from 4 to 8 feet in diameter were measured in the laboratory. Because only three tests were conducted, a theoretical model to evaluate the stiffness of pipes of a variety of gages and corrugation geometries was also developed. The experimental results indicated a "stiffness" EI in the range of 9.11 x 105 k-in2 to 34.43 x 105 k-in2 for the three pipes with the larger diameter pipes having greater stiffness. The theoretical model developed conservatively estimates these stiffnesses.
Design Methodology for Corrugated Metal Pipe Tiedowns
Author:
Publisher:
ISBN:
Category : Culverts
Languages : en
Pages : 200
Book Description
Questionnaires were sent to transportation agencies in all 50 states in the U.S., to Puerto Rico, and all provinces in Canada asking about their experiences with uplift problems of - corrugated metal pipe (CMP). Responses were received from 52 agencies who reported 9 failures within the last 5 years. Some agencies also provided design standards for tiedowns to resist uplift. There was a wide variety in restraining forces used; for example for a pipe 6 feet in diameter, the resisting force ranged from 10 kips to 66 kips. These responses verified the earlier conclusion based on responses from Iowa county engineers that a potential uplift danger exists.when end restraint is not provided for CMP and that existing designs have an unclear theoretical or experimental basis. In an effort to develop more rational design standards, the longitudinal stiffness of three CMP ranging from 4 to 8 feet in diameter were measured in the laboratory. Because only three tests were conducted, a theoretical model to evaluate the stiffness of pipes of a variety of gages and corrugation geometries was also developed. The experimental results indicated a "stiffness" EI in the range of 9.11 x 105 k-in2 to 34.43 x 105 k-in2 for the three pipes with the larger diameter pipes having greater stiffness. The theoretical model developed conservatively estimates these stiffnesses.
Publisher:
ISBN:
Category : Culverts
Languages : en
Pages : 200
Book Description
Questionnaires were sent to transportation agencies in all 50 states in the U.S., to Puerto Rico, and all provinces in Canada asking about their experiences with uplift problems of - corrugated metal pipe (CMP). Responses were received from 52 agencies who reported 9 failures within the last 5 years. Some agencies also provided design standards for tiedowns to resist uplift. There was a wide variety in restraining forces used; for example for a pipe 6 feet in diameter, the resisting force ranged from 10 kips to 66 kips. These responses verified the earlier conclusion based on responses from Iowa county engineers that a potential uplift danger exists.when end restraint is not provided for CMP and that existing designs have an unclear theoretical or experimental basis. In an effort to develop more rational design standards, the longitudinal stiffness of three CMP ranging from 4 to 8 feet in diameter were measured in the laboratory. Because only three tests were conducted, a theoretical model to evaluate the stiffness of pipes of a variety of gages and corrugation geometries was also developed. The experimental results indicated a "stiffness" EI in the range of 9.11 x 105 k-in2 to 34.43 x 105 k-in2 for the three pipes with the larger diameter pipes having greater stiffness. The theoretical model developed conservatively estimates these stiffnesses.
Design Methodology for Corrugated Metal Pipe Tiedowns
Author: F. W. Klaiber
Publisher:
ISBN:
Category : Pipelines
Languages : en
Pages : 125
Book Description
Publisher:
ISBN:
Category : Pipelines
Languages : en
Pages : 125
Book Description
Design Methodology for Corrugated Metal Pipe Tiedowns
Author: Robert A. Lohnes
Publisher:
ISBN:
Category : Culverts
Languages : en
Pages : 125
Book Description
Objectives were to determine if a restraining force is required to prevent inlet uplift failures in corrugated metal pipe (CMP) installations and to develop a procedure for calculating the required force when restraint is required.
Publisher:
ISBN:
Category : Culverts
Languages : en
Pages : 125
Book Description
Objectives were to determine if a restraining force is required to prevent inlet uplift failures in corrugated metal pipe (CMP) installations and to develop a procedure for calculating the required force when restraint is required.
Progress Report for HR-332
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Design Methodology for the Prevention of Longitudinal Uplift in Corrugated Metal Pipe
Author: Barry Craig Morgan
Publisher:
ISBN:
Category :
Languages : en
Pages : 196
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 196
Book Description
Corrugated Metal Pipe
Author: United States. Bureau of Public Roads
Publisher:
ISBN:
Category : Culverts
Languages : en
Pages : 40
Book Description
Publisher:
ISBN:
Category : Culverts
Languages : en
Pages : 40
Book Description
Solving Drainage Problems
Author: Bethlehem Steel Company
Publisher:
ISBN:
Category : Culverts
Languages : en
Pages : 94
Book Description
Publisher:
ISBN:
Category : Culverts
Languages : en
Pages : 94
Book Description
Structural Performance Verification of Structural Pipe Liners for Corrugated Metal Pipes
Author: Tyler DuBose
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Buried culverts are important structures within our civil infrastructure that convey water beneath roadways, bridges, and other systems while also supporting loads above it. However, many culverts that consist of corrugated metal pipes are deteriorating and reaching the end of their design life span. Spray applied pipe liners (SAPLs) have become a popular rehabilitation strategy to strengthen deteriorated culverts, essentially replacing its host (original) structure with minimal disruption to the surrounding site and traffic. Currently, however, there is no universal design methodology for SAPLs, and variations in the product quality, durability and overall structural performance have been observed. Background knowledge on rigid and flexible buried pipe design is discussed to verify the expected load bearing capacity of SAPLs, understand the SAPL behavior, and develop a better understanding of the SAPL as the new host structure. In this study, a deteriorated culvert consisting of corrugated metal pipe is load tested before and after it has been lined with a geopolymer mortar liner. Results from the diagnostic load testing using mounted sensors and vision-based measurement techniques are presented to evaluate the maximum deformations and compared to design calculations due to the presence of live load acting on the culvert. Based on the field testing, hand calculations, and model analysis, the geopolymer SAPL improved the strength of the culvert. Among the analysis methods used, the arch representation of the culvert provided the closest approximation of both the deflection and stress behavior at the crown and a similar stress pattern to the field culvert.
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
Book Description
Buried culverts are important structures within our civil infrastructure that convey water beneath roadways, bridges, and other systems while also supporting loads above it. However, many culverts that consist of corrugated metal pipes are deteriorating and reaching the end of their design life span. Spray applied pipe liners (SAPLs) have become a popular rehabilitation strategy to strengthen deteriorated culverts, essentially replacing its host (original) structure with minimal disruption to the surrounding site and traffic. Currently, however, there is no universal design methodology for SAPLs, and variations in the product quality, durability and overall structural performance have been observed. Background knowledge on rigid and flexible buried pipe design is discussed to verify the expected load bearing capacity of SAPLs, understand the SAPL behavior, and develop a better understanding of the SAPL as the new host structure. In this study, a deteriorated culvert consisting of corrugated metal pipe is load tested before and after it has been lined with a geopolymer mortar liner. Results from the diagnostic load testing using mounted sensors and vision-based measurement techniques are presented to evaluate the maximum deformations and compared to design calculations due to the presence of live load acting on the culvert. Based on the field testing, hand calculations, and model analysis, the geopolymer SAPL improved the strength of the culvert. Among the analysis methods used, the arch representation of the culvert provided the closest approximation of both the deflection and stress behavior at the crown and a similar stress pattern to the field culvert.
Durability Design Method for Galvanized Steel Pipe in Minnesota
Author: A. Roland Holt
Publisher:
ISBN:
Category : Culverts
Languages : en
Pages : 34
Book Description
Publisher:
ISBN:
Category : Culverts
Languages : en
Pages : 34
Book Description
Transportation Research Record
Author:
Publisher:
ISBN:
Category : Air travel
Languages : en
Pages : 512
Book Description
Publisher:
ISBN:
Category : Air travel
Languages : en
Pages : 512
Book Description