The Experts below are selected from a list of 285 Experts worldwide ranked by ideXlab platform
Yong Bai - One of the best experts on this subject based on the ideXlab platform.
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Development of a Wireless Real-Time Productivity Measurement System for Rapid Bridge Replacement
2008Co-Authors: Yong Bai, Seonghoon KimAbstract:Increased attention has been paid to rapid Bridge Replacement, one of the critical components of the nation’s transportation network, since the terrorist attacks on September 11, 2001. To enhance the capability of rapid Replacement of damaged Bridges after extreme events, a prototype wireless real-time productivity measurement system has been developed. The developed system has a potential not only to improve the accuracy of construction schedule but also to strengthen the communication and coordination among parties involved in the Replacement process after extreme events by providing accurate productivity information in real time. To validate the developed system, field experiments were conducted at three construction sites. Results of data analyses indicate that it is feasible to use the developed system to measure on-site productivity in real time; and productivity measurements were accurate and could be shared among all parties involved in the Replacement process.
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Enhancing the capability of rapid Bridge Replacement after extreme events
Engineering Construction and Architectural Management, 2007Co-Authors: Yong Bai, Seonghoon Kim, William R. BurkettAbstract:Purpose – The potential threats of extreme events to highway Bridges have received increased attention from government agencies, the engineering and construction communities, and the traveling public. These events include terrorist attacks as well as human‐induced and natural hazards such as earthquakes, explosions, fires, floods, and hurricanes. To respond to the potential threats on highway Bridges, a research project was conducted to identify rapid Bridge Replacement processes, techniques, and needs for improvements.Design/methodology/approach – To achieve the research objectives, a detailed case study of previous Bridge Replacement following an extreme event was conducted. The case study was performed using a three‐step approach. First, the research team reviewed the literature related to the case. Second, the research team interviewed the people who were involved with the case via the telephone. Third, the research team conducted a written survey to gain knowledge about the previously unanswered ques...
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Development of a Real-Time Productivity Measurement System for Bridge Replacement
2007Co-Authors: Seonghoon Kim, Yong BaiAbstract:Increased attention has been paid to the highway Bridges, one of the critical components of the nation’s transportation network, since the terrorist attacks of September 11, 2001, Hurricane Katrina, and the tsunami in South Asia. To enhance the capability of rapid Bridge Replacement after extreme events, a realtime productivity measurement system has been developed. The developed system has the potential to enhance the capability of rapid Bridge Replacement by providing more accurate onsite productivity information. Using the information, a more reliable construction schedule could be developed to support the rapid Bridge Replacement operations. To validate the system, field experiments were conducted at U.S. Highway 36 near Washington, Kansas. This paper presents the major components of the developed system, the framework of the system, and the preliminary field experiment results.
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Processes and Techniques for Rapid Bridge Replacement After Extreme Events
Transportation Research Record, 2007Co-Authors: Yong Bai, Seonghoon KimAbstract:Highway Bridges, as critical components of the nation's transportation network, have received increased attention after the terrorist attacks on September 11, 2001, and subsequent potential threats to U.S. transportation systems. To respond to the potential threats on highway Bridges, a pooled-fund research project was conducted to identify rapid Bridge Replacement processes and techniques after extreme events. These events include manufactured and natural disasters such as earthquakes, explosions, fires, floods, and hurricanes. To achieve the research objectives, the research team studied three cases of previous Bridge Replacements following extreme events. These cases are the I-40 Webbers Falls Bridge in Oklahoma, the I-95 Chester Creek Bridge in Pennsylvania, and the I-87 New York State Thruway Bridge in Yonkers, New York. By studying these cases, the research team first sought to identify and expand on lessons learned. Lessons learned from these cases benefit government agencies such as state departme...
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Rapid Bridge Replacement: Processes, Techniques, and Needs for Improvements
Journal of Construction Engineering and Management, 2006Co-Authors: Yong Bai, William R. BurkettAbstract:The terrorist attack on September 11, 2001 and subsequent potential threats to the United States transportation systems have presented an urgent need to develop emergency response plans in order to quickly react to the possible consequences of an extreme event. Highway Bridges, as critical components of the nation's transportation network, have received increased attention. To respond to the potential threats on highway Bridges, a research project was conducted to identify rapid Bridge Replacement processes, techniques, and needs for improvements. To achieve the research objectives, the research team studied three cases of previous Bridge Replacements following extreme events. By studying these cases, the research team first sought to identify and expand on lessons learned and then addressed which actions did and did not work effectively under the incident circumstances. Using the lessons learned government agencies and engineering and construction communities could enhance their emergency response plans for future incidents. Next, the research team identified needed improvements so that the research community could investigate new technologies to advance current practices.
Seonghoon Kim - One of the best experts on this subject based on the ideXlab platform.
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Development of a Wireless Real-Time Productivity Measurement System for Rapid Bridge Replacement
2008Co-Authors: Yong Bai, Seonghoon KimAbstract:Increased attention has been paid to rapid Bridge Replacement, one of the critical components of the nation’s transportation network, since the terrorist attacks on September 11, 2001. To enhance the capability of rapid Replacement of damaged Bridges after extreme events, a prototype wireless real-time productivity measurement system has been developed. The developed system has a potential not only to improve the accuracy of construction schedule but also to strengthen the communication and coordination among parties involved in the Replacement process after extreme events by providing accurate productivity information in real time. To validate the developed system, field experiments were conducted at three construction sites. Results of data analyses indicate that it is feasible to use the developed system to measure on-site productivity in real time; and productivity measurements were accurate and could be shared among all parties involved in the Replacement process.
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Enhancing the capability of rapid Bridge Replacement after extreme events
Engineering Construction and Architectural Management, 2007Co-Authors: Yong Bai, Seonghoon Kim, William R. BurkettAbstract:Purpose – The potential threats of extreme events to highway Bridges have received increased attention from government agencies, the engineering and construction communities, and the traveling public. These events include terrorist attacks as well as human‐induced and natural hazards such as earthquakes, explosions, fires, floods, and hurricanes. To respond to the potential threats on highway Bridges, a research project was conducted to identify rapid Bridge Replacement processes, techniques, and needs for improvements.Design/methodology/approach – To achieve the research objectives, a detailed case study of previous Bridge Replacement following an extreme event was conducted. The case study was performed using a three‐step approach. First, the research team reviewed the literature related to the case. Second, the research team interviewed the people who were involved with the case via the telephone. Third, the research team conducted a written survey to gain knowledge about the previously unanswered ques...
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Development of a Real-Time Productivity Measurement System for Bridge Replacement
2007Co-Authors: Seonghoon Kim, Yong BaiAbstract:Increased attention has been paid to the highway Bridges, one of the critical components of the nation’s transportation network, since the terrorist attacks of September 11, 2001, Hurricane Katrina, and the tsunami in South Asia. To enhance the capability of rapid Bridge Replacement after extreme events, a realtime productivity measurement system has been developed. The developed system has the potential to enhance the capability of rapid Bridge Replacement by providing more accurate onsite productivity information. Using the information, a more reliable construction schedule could be developed to support the rapid Bridge Replacement operations. To validate the system, field experiments were conducted at U.S. Highway 36 near Washington, Kansas. This paper presents the major components of the developed system, the framework of the system, and the preliminary field experiment results.
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Processes and Techniques for Rapid Bridge Replacement After Extreme Events
Transportation Research Record, 2007Co-Authors: Yong Bai, Seonghoon KimAbstract:Highway Bridges, as critical components of the nation's transportation network, have received increased attention after the terrorist attacks on September 11, 2001, and subsequent potential threats to U.S. transportation systems. To respond to the potential threats on highway Bridges, a pooled-fund research project was conducted to identify rapid Bridge Replacement processes and techniques after extreme events. These events include manufactured and natural disasters such as earthquakes, explosions, fires, floods, and hurricanes. To achieve the research objectives, the research team studied three cases of previous Bridge Replacements following extreme events. These cases are the I-40 Webbers Falls Bridge in Oklahoma, the I-95 Chester Creek Bridge in Pennsylvania, and the I-87 New York State Thruway Bridge in Yonkers, New York. By studying these cases, the research team first sought to identify and expand on lessons learned. Lessons learned from these cases benefit government agencies such as state departme...
Edwin Callicutt - One of the best experts on this subject based on the ideXlab platform.
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SPECIAL-DESIGN PRECAST CONCRETE BEAMS FOR SIDNEY LANIER Bridge Replacement PROJECT
Transportation Research Record, 2000Co-Authors: Edwin CallicuttAbstract:The Sidney Lanier Bridge Replacement Project is a $100 million undertaking in Brunswick, Georgia, that will lead to the Replacement of an existing 40-year-old steel lift-span structure. The approach Bridges that lead to the project's main-span unit consist of 16 spans of 54.9-m (180-ft), special-design, precast concrete beams as well as 14 spans of 36.6-m (120-ft) Type V AASHTO girders. The special-design beams are 2.3 m (7.5 ft) deep, are erected as simply supported members and are then made into two-span continuous units by longitudinal posttensioning, and are rigidly connected transversely with cast-in-place diaphragms. The riding surface is a cast-in-place concrete deck constructed on stay-in-place metal forms. The 54.9-m (180-ft) beams, supported by hollow tapered concrete piers with hammerhead caps, are founded on 1.2-m (48-in.) drilled shafts. Wet-hole construction methods with bentonite slurry were required for the drilled shafts. The Bridge piers are over land and water, and large cofferdams were...
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Special-Design Precast Concrete Beams for Sidney Lanier Bridge Replacement Project
Transportation Research Record: Journal of the Transportation Research Board, 2000Co-Authors: Edwin CallicuttAbstract:The Sidney Lanier Bridge Replacement Project is a $100 million undertaking in Brunswick, Georgia, that will lead to the Replacement of an existing 40-year-old steel lift-span structure. The approach Bridges that lead to the project’s main-span unit consist of 16 spans of 54.9-m (180-ft), special-design, precast concrete beams as well as 14 spans of 36.6-m (120-ft) Type V AASHTO girders. The special-design beams are 2.3 m (7.5 ft) deep, are erected as simply supported members and are then made into two-span continuous units by longitudinal posttensioning, and are rigidly connected transversely with cast-in-place diaphragms. The riding surface is a cast-in-place concrete deck constructed on stay-in-place metal forms. The 54.9-m (180-ft) beams, supported by hollow tapered concrete piers with hammerhead caps, are founded on 1.2-m (48-in.) drilled shafts. Wet-hole construction methods with bentonite slurry were required for the drilled shafts. The Bridge piers are over land and water, and large cofferdams were required to facilitate construction. Additionally, the sizes of the cast-in-place footings and hammerhead pier caps required mass concrete thermal considerations. The approach Bridges lead to the main-span portion of the project, which will be a 762-m (2,500-ft) concrete, cable-stayed unit with a 381-m (1,250-ft) center span. The design, casting, and erection of these beams, and construction of the substructure, posed many challenges to the Georgia Department of Transportation designers and contractors. These beams are among the longest erected in Georgia.
Samuel Labi - One of the best experts on this subject based on the ideXlab platform.
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Efficiency Measurement of Bridge Management with Data Envelopment Analysis
Transportation Research Record, 2015Co-Authors: Zhibo Zhang, Bismark R. D. K. Agbelie, Samuel LabiAbstract:This study explored the feasibility of data envelopment analysis (DEA) to measure objectively the efficiency of Interstate Bridge Replacement and rehabilitation programs of the state highway agencies in the United States. Past applications of DEA indicated that this method showed promise for such assessments because of the ability to take into account the effect of uncontrollable factors and scale efficiency. The current study developed a modified input-oriented variable returns to scale model that treated the uncontrollable variables as uncontrollable. The two variables selected as outputs were (a) the change in area of structurally deficient Bridges and (b) the change in area of functionally obsolete Bridges between two consecutive years. The six variables selected as inputs were (a) expenditures on Interstate Bridge Replacement and rehabilitation, (b) average daily traffic on Interstate Bridges per deck area, (c) proportion of Interstate truck vehicle miles traveled (VMT) to Interstate total VMT, (d) a...
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Enhanced Bridge Replacement cost models for Indiana's Bridge management system
Transportation Research Record, 2006Co-Authors: Marcela M Rodriguez, Samuel LabiAbstract:Bridge managers have a duty to monitor and update the costs of Bridge preservation activities and to implement cost-effective actions that are in the best interests of taxpayers. This paper presents details of Replacement cost modeling for each Bridge component (superstructure, substructure, approach, and other costs) for Bridges with concrete slab, concrete beam, or steel superstructures. This was done with recent Bridge construction data on the Indiana state highway network. It was determined that costs other than substructure and superstructure costs accounted for more than one-half of total Replacement cost. The present study supports earlier studies by asserting that basic Bridge characteristics such as type, length, and deck area may generally be used to derive reliable estimates of Bridge Replacement costs. The study also shows that economies of scale can play a significant role in reliable Bridge cost estimation. It was determined that the average overall unit cost of Replacement for steel superstructure Bridges was generally lower than that for concrete superstructure Bridges. It was seen that differences in Replacement costs across Bridge types are attributable not necessarily to cost differences in material and construction procedure only but also to economy-of-scale effects. Cost models can be used to predict total costs of future Bridge Replacements and are therefore useful for vital Bridge management functions such as needs assessments, budgeting, and programming.
David W. Johnston - One of the best experts on this subject based on the ideXlab platform.
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Bridge Replacement COST ANALYSIS PROCEDURES
Transportation Research Record, 1995Co-Authors: Imad J Abed-al-rahim, David W. JohnstonAbstract:For some agencies Bridge Replacement costs are considered to be the highest proportion of funding needs among the three Bridge improvement alternatives of maintenance, rehabilitation, and Replacement. Estimating the Bridge Replacement cost is therefore a very important component of any Bridge management system implemented in response to the Intermodal Surface Transportation Efficiency Act of 1991. In response to this need analytical procedures were developed for estimating the costs of the Bridge structure, roadway improvements, and engineering for budgeting purposes. Methodologies for predicting the new Bridge length, width, and maximum span length, which were found to affect the total cost of Bridge Replacement, on the basis of existing Bridge and roadway data characteristics, were also developed.