The Experts below are selected from a list of 312 Experts worldwide ranked by ideXlab platform
Timothy J. Mcgrath - One of the best experts on this subject based on the ideXlab platform.
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Management of Utah Highway Culverts
Transportation Research Record: Journal of the Transportation Research Board, 2005Co-Authors: Jesse L. Beaver, Timothy J. McgrathAbstract:More than 47,000 Culverts have been installed under the highways of Utah. The Utah Department of Transportation (DOT) maintains these Culverts but has no comprehensive system for assessing condition and planning maintenance activities. Utah DOT initiated a study to determine the condition of its Culverts by field surveys. The objective was to develop a system of qualitative and quantitative performance measures to assess both the long- and short-term behavior of highway Culverts and to support the Utah DOT effort to modify and populate a computerized database designed to store culvert inspection data that can be used for statewide culvert asset management. Culvert management practices currently used by Utah DOT and other agencies are described. A total of 272 culvert inspections conducted during this project showed the inventory to be aging but not generally in need of immediate maintenance. The Utah DOT database, developed to track culvert condition, is effective but could be improved. Improvements would streamline both culvert inspections and priority ranking of culvert repairs. The FHWA system for rating culvert maintenance action was adopted, with a new proposed table for rating thermoplastic pipe. Culvert ratings were adjusted with an importance modifier that focused inspection and maintenance activity on critical Culverts with higher consequence of failure. Critical Culverts should be placed on a regular inspection schedule, whereas other Culverts can be inspected during periodic roadway repaving or rehabilitation. Culvert inspection results will be added to the database to provide more insight eventually into culvert service life than is now possible.
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Management of Utah highway Culverts
Transportation Research Record, 2005Co-Authors: Jesse L. Beaver, Timothy J. McgrathAbstract:More than 47,000 Culverts have been installed under the highways of Utah. The Utah Department of Transportation (DOT) maintains these Culverts but has no comprehensive system for assessing condition and planning maintenance activities. Utah DOT initiated a study to determine the condition of its Culverts by field surveys. The objective was to develop a system of qualitative and quantitative performance measures to assess both the long- and short-term behavior of highway Culverts and to support the Utah DOT effort to modify and populate a computerized data-base designed to store culvert inspection data that can be used for statewide culvert asset management. Culvert management practices currently used by Utah DOT and other agencies are described. A total of 272 culvert inspections conducted during this project showed the inventory to be aging but not generally in need of immediate maintenance. The Utah DOT database, developed to track culvert condition, is effective but could be improved. Improvements woul...
Jesse L. Beaver - One of the best experts on this subject based on the ideXlab platform.
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Management of Utah Highway Culverts
Transportation Research Record: Journal of the Transportation Research Board, 2005Co-Authors: Jesse L. Beaver, Timothy J. McgrathAbstract:More than 47,000 Culverts have been installed under the highways of Utah. The Utah Department of Transportation (DOT) maintains these Culverts but has no comprehensive system for assessing condition and planning maintenance activities. Utah DOT initiated a study to determine the condition of its Culverts by field surveys. The objective was to develop a system of qualitative and quantitative performance measures to assess both the long- and short-term behavior of highway Culverts and to support the Utah DOT effort to modify and populate a computerized database designed to store culvert inspection data that can be used for statewide culvert asset management. Culvert management practices currently used by Utah DOT and other agencies are described. A total of 272 culvert inspections conducted during this project showed the inventory to be aging but not generally in need of immediate maintenance. The Utah DOT database, developed to track culvert condition, is effective but could be improved. Improvements would streamline both culvert inspections and priority ranking of culvert repairs. The FHWA system for rating culvert maintenance action was adopted, with a new proposed table for rating thermoplastic pipe. Culvert ratings were adjusted with an importance modifier that focused inspection and maintenance activity on critical Culverts with higher consequence of failure. Critical Culverts should be placed on a regular inspection schedule, whereas other Culverts can be inspected during periodic roadway repaving or rehabilitation. Culvert inspection results will be added to the database to provide more insight eventually into culvert service life than is now possible.
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Management of Utah highway Culverts
Transportation Research Record, 2005Co-Authors: Jesse L. Beaver, Timothy J. McgrathAbstract:More than 47,000 Culverts have been installed under the highways of Utah. The Utah Department of Transportation (DOT) maintains these Culverts but has no comprehensive system for assessing condition and planning maintenance activities. Utah DOT initiated a study to determine the condition of its Culverts by field surveys. The objective was to develop a system of qualitative and quantitative performance measures to assess both the long- and short-term behavior of highway Culverts and to support the Utah DOT effort to modify and populate a computerized data-base designed to store culvert inspection data that can be used for statewide culvert asset management. Culvert management practices currently used by Utah DOT and other agencies are described. A total of 272 culvert inspections conducted during this project showed the inventory to be aging but not generally in need of immediate maintenance. The Utah DOT database, developed to track culvert condition, is effective but could be improved. Improvements woul...
Halil Sezen - One of the best experts on this subject based on the ideXlab platform.
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joint response of existing pipe Culverts under surface live loads
Journal of Performance of Constructed Facilities, 2015Co-Authors: Timothy Sheldon, Halil Sezen, Ian D MooreAbstract:AbstractThis study investigates the field performance of culvert joints in five existing pipe Culverts. Test Culverts consisted of two corrugated metal Culverts, two reinforced concrete Culverts, and one high-density polyethylene culvert. Culverts were selected for backfill depths less than 1.5 m and inner diameters ranging from 0.9 to 2.1 m. Static loading was applied to the Culverts by parking a heavily loaded truck at different positions above the culvert joint. Dynamic loading was applied by driving the truck over the culvert at speeds ranging from 8 to 48 km/h. Culvert deflections and strains were measured near one of the culvert’s joints. Separation at the joint was also measured. The results indicate that separation at the joint was quite significant at times. In the worst case, the measured separation at the joint was equal to 50% of the measured deflection. Strains measured near the joint in steel Culverts were significantly smaller than the yield strain. The dynamic deflections were typically 1...
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simulation of behavior of in service metal Culverts
Journal of Pipeline Systems Engineering and Practice, 2014Co-Authors: Kyong Y Yeau, Halil Sezen, Patrick J FoxAbstract:As part of an experimental program, a large number of in-service Culverts were tested to investigate the influence of several parameters on field performance of Culverts. These parameters included cover depth, load application, size, shape, and other properties of corrugated metal Culverts. Response of 14 test Culverts was simulated using a two-dimensional finite element program and a three-dimensional finite difference program. Deflections predicted from the two-dimensional analyses were larger than the deflections measured in the field. However, the experimental and calculated thrust forces were similar. Deflections and thrust forces predicted from the three-dimensional analysis were similar to the experimental results. The critical factors affecting the response of the Culverts include cover depth, culvert size, metal thickness, and elastic modulus and other properties of backfill soil. The influence of these parameters on the culvert behavior is investigated through numerical simulations using the established modeling properties.
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load rating procedures and performance evaluation of metal Culverts
Journal of Bridge Engineering, 2012Co-Authors: Kyong Y Yeau, Halil SezenAbstract:Load-rating factors are used to evaluate the service life or safety of Culverts based on the culvert wall strength and soil cover depth over the culvert. Current culvert load-rating methods have deficiencies in identifying potential critical conditions of corrugated metal Culverts. Current load-rating procedures do not provide explicit guidance to the engineer for load rating and evaluation of culvert condition. To ensure good performance over the design life, corrugated metal Culverts must be designed and regularly evaluated using an effective load-rating method. The main objective of this study was to investigate the effectiveness of current load-rating procedures. Recommendations are made to improve the analysis and evaluation procedures for corrugated metal Culverts. The proposed load-rating procedure is based on an extensive review of load-rating procedures and design practices, experimental data, and theoretical investigations. The proposed method does not include a rating factor for cover depth. However, the design cover depth is required to be checked during the initial design stage to ensure structural stability. New capacity reduction factors are introduced for culvert wall and seam, which require different appraisals for wall and seam during annual inspections. The effect of external live loads is not included in the proposed load-rating procedure for deep Culverts and for Culverts subjected to low live load stresses. Field data from 39 in-service Culverts showed that the proposed load-rating procedure is effective in evaluation of the existing condition of Culverts.
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load performance of in situ corrugated steel highway Culverts
Journal of Performance of Constructed Facilities, 2009Co-Authors: Kyong Y Yeau, Halil Sezen, Patrick J FoxAbstract:This paper presents the results of field performance tests of 39 in-service corrugated steel highway Culverts in Ohio. The Culverts had span lengths varying from 3.23 m (10.6 ft) to 7.04 m (23.1 ft) and backfill soil heights over the crown varying from 0.27 m (0.9 ft) to 7.47 m (24.5 ft). Static and dynamic load tests were conducted by driving heavy trucks across the Culverts. Static loads were applied at ten different locations above each culvert. Dynamic load tests were conducted at six truck speeds varying from 8 km/h (5 mi/h) to 64 km/h (40 mi/h). A portable instrumentation frame was installed inside each test culvert to monitor deflections. Strains on the culvert walls were also measured at 14 locations using strain gauges. Effects of backfill height and loading conditions are investigated. According to the experimental results, a plot of maximum culvert deflection versus backfill height shows a nonlinear relationship. Maximum static load deflections were found to be consistently larger than the maximum dynamic deflections obtained using the same test truck. Deflections were nearly zero for deep Culverts with backfill heights exceeding 4 m (13 ft). Maximum deflections correlate more closely to equivalent line loads than to total truck weight. The data also indicate that culvert behavior is more difficult to predict when backfill heights are shallow because other factors, such as culvert age and condition and soil type, likely play a significant role.
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in situ load testing of corrugated steel pipe arch Culverts
Journal of Performance of Constructed Facilities, 2008Co-Authors: Halil Sezen, Kyong Y Yeau, Patrick J FoxAbstract:A large number of corrugated metal pipe-arch Culverts are located under highways. This study investigates the field performance of four existing pipe-arch Culverts under static and dynamic loads. Effects of various parameters were considered in selection of the Culverts, including backfill height, loading conditions, age of placement, and culvert geometry. Static loads were applied at ten different locations above each culvert using heavily loaded test trucks. Six dynamic tests were conducted at speeds varying from 8 to 64 km/h. A portable instrumentation frame was installed inside each test culvert to monitor the deflections at five critical locations. During each test, strains were also measured using 14 strain gauges. Test results indicated that culvert response was influenced significantly by the backfill height. Nearly symmetrical deflection patterns were recorded for symmetrical loading about the longitudinal vertical plane through the crown. The maximum static deflections were larger than the maximum dynamic deflections for each culvert.
Jay N. Meegoda - One of the best experts on this subject based on the ideXlab platform.
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Culvert Information Management System
Transportation Research Record, 2009Co-Authors: Jay N. Meegoda, Thomas M. Juliano, Chi TangAbstract:A pilot scale culvert information management system (CIMS) was developed for the New Jersey Department of Transportation to comply with requirements stipulated by the Governmental Accounting Standards Board, GASB-34, and new federal stormwater regulations. The condition states of Culverts are used to express the extent of their deterioration and survival probabilities. A financial analysis model was developed on the basis of the remaining value of Culverts and the user cost of failures. Different rehabilitation options were discussed, and recommendations were made for deteriorated Culverts on the basis of financial analysis. The pilot CIMS can analyze prescribed culvert information and make decisions to inspect, rehabilitate, or replace Culverts or to do nothing at project and network levels. At the project level, this is achieved by comparing inspection, rehabilitation, or replacement costs with risks and costs associated with failure. At the network level, the associated costs are optimized to meet annu...
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Estimation of the Remaining Service Life of Culverts
2008Co-Authors: Jay N. Meegoda, Thomas M. Juliano, Sameer WadhawanAbstract:Culvert pipes play an integral part in transportation infrastructure since they facilitate safe drainage. A loss of culvert integrity could result in temporary roadway closure and considerable rehabilitation/replacement costs or worse. In addition, the total collapse of a culvert could pose a major safety risk to motorists. Hence Culverts should be routinely inspected and condition state determined to estimate the remaining service life of Culverts to propose corrective actions so as to prevent costly culvert failures. The techniques are developed for estimating the remaining service life of five types of Culverts: Brick/Clay, Concrete, Cast Iron, Corrugated Steel and Corrugated Aluminum. A five state Condition State model that is used to express the extent of the culvert deterioration, is coupled with a reliability analysis based upon the Weibull model to estimate the remaining service life of the culvert. The cumulative distribution function of failure is normalized by the design life in order to collapse the decay curve into a single curve for the five material types. Based on the inspection data it was concluded that the proposed theory could represent the culvert performance data for five different culvert material types used in New Jersey. The proposed theory represents a preliminary approach to estimation of remaining service life of Culverts. Future research is expected to focus on field studies to obtain the necessary cost and performance parameters for deteriorating culvert pipes and to perform a statistical analysis of the sample.
Patrick J Fox - One of the best experts on this subject based on the ideXlab platform.
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simulation of behavior of in service metal Culverts
Journal of Pipeline Systems Engineering and Practice, 2014Co-Authors: Kyong Y Yeau, Halil Sezen, Patrick J FoxAbstract:As part of an experimental program, a large number of in-service Culverts were tested to investigate the influence of several parameters on field performance of Culverts. These parameters included cover depth, load application, size, shape, and other properties of corrugated metal Culverts. Response of 14 test Culverts was simulated using a two-dimensional finite element program and a three-dimensional finite difference program. Deflections predicted from the two-dimensional analyses were larger than the deflections measured in the field. However, the experimental and calculated thrust forces were similar. Deflections and thrust forces predicted from the three-dimensional analysis were similar to the experimental results. The critical factors affecting the response of the Culverts include cover depth, culvert size, metal thickness, and elastic modulus and other properties of backfill soil. The influence of these parameters on the culvert behavior is investigated through numerical simulations using the established modeling properties.
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load performance of in situ corrugated steel highway Culverts
Journal of Performance of Constructed Facilities, 2009Co-Authors: Kyong Y Yeau, Halil Sezen, Patrick J FoxAbstract:This paper presents the results of field performance tests of 39 in-service corrugated steel highway Culverts in Ohio. The Culverts had span lengths varying from 3.23 m (10.6 ft) to 7.04 m (23.1 ft) and backfill soil heights over the crown varying from 0.27 m (0.9 ft) to 7.47 m (24.5 ft). Static and dynamic load tests were conducted by driving heavy trucks across the Culverts. Static loads were applied at ten different locations above each culvert. Dynamic load tests were conducted at six truck speeds varying from 8 km/h (5 mi/h) to 64 km/h (40 mi/h). A portable instrumentation frame was installed inside each test culvert to monitor deflections. Strains on the culvert walls were also measured at 14 locations using strain gauges. Effects of backfill height and loading conditions are investigated. According to the experimental results, a plot of maximum culvert deflection versus backfill height shows a nonlinear relationship. Maximum static load deflections were found to be consistently larger than the maximum dynamic deflections obtained using the same test truck. Deflections were nearly zero for deep Culverts with backfill heights exceeding 4 m (13 ft). Maximum deflections correlate more closely to equivalent line loads than to total truck weight. The data also indicate that culvert behavior is more difficult to predict when backfill heights are shallow because other factors, such as culvert age and condition and soil type, likely play a significant role.
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in situ load testing of corrugated steel pipe arch Culverts
Journal of Performance of Constructed Facilities, 2008Co-Authors: Halil Sezen, Kyong Y Yeau, Patrick J FoxAbstract:A large number of corrugated metal pipe-arch Culverts are located under highways. This study investigates the field performance of four existing pipe-arch Culverts under static and dynamic loads. Effects of various parameters were considered in selection of the Culverts, including backfill height, loading conditions, age of placement, and culvert geometry. Static loads were applied at ten different locations above each culvert using heavily loaded test trucks. Six dynamic tests were conducted at speeds varying from 8 to 64 km/h. A portable instrumentation frame was installed inside each test culvert to monitor the deflections at five critical locations. During each test, strains were also measured using 14 strain gauges. Test results indicated that culvert response was influenced significantly by the backfill height. Nearly symmetrical deflection patterns were recorded for symmetrical loading about the longitudinal vertical plane through the crown. The maximum static deflections were larger than the maximum dynamic deflections for each culvert.
