The Experts below are selected from a list of 39 Experts worldwide ranked by ideXlab platform

Haluk Aktan - One of the best experts on this subject based on the ideXlab platform.

  • Computational Framework for Predicting Accelerated Bridge Construction Technology Specific Costs and Benefits
    2016
    Co-Authors: Abdul Wahed Mohammed, Upul Attanayake, Corey Rogers, Haluk Aktan
    Abstract:

    Mobility impact time due to bridge construction is a major concern in terms of safety and user cost. Hence, accelerated bridge construction (ABC) technologies such as Self-Propelled Modular Transporter (SPMT) move and slide-in bridge construction (SIBC) or lateral slide are implemented. At present, during the maturing process of ABC, the emphasis is to standardize ABC and allow local contractors build experience. A major step towards standardization is to develop policies/tools for assisting bridge community in the project scoping process, wherein sites can be evaluated for ABC implementation. To address the need, the authors developed a decision-making model that incorporates cost models to evaluate specific ABC technologies for a site. Predicting costs for ABC specific activities and benefits is an essential part in the decision-making process. Recently, an SIBC cost estimation tool was developed under the Every Day Counts initiative of Federal Highway Administration (FHWA). The tool provides a total estimated SIBC cost; however, lacks providing itemized costs for SIBC activities and SPMT-specific cost estimation. Understanding the need, the authors developed a computational framework to predict costs and benefits for ABC technologies. The framework and its implementation are presented in this article. The costs are estimated based on data from past ABC projects in the US. When a statistically meaningful number of projects are implemented in a specific jurisdiction, the framework can be adopted seamlessly to evaluate costs and benefits of ABC implementation in that jurisdiction.

  • Research on Evaluation and Standardization of Accelerated Bridge Construction Techniques
    2015
    Co-Authors: Haluk Aktan, Upul Attanayake
    Abstract:

    The Michigan Department of Transportation (MDOT) uses Accelerated bridge construction (ABC) to reduce delays and minimize construction impacts. MDOT contracted and completed several bridges using prefabricated bridge elements and systems (PBES). In 2014, two slide-in bridge construction (SIBC) projects were contracted and completed. These two projects included three bridge replacements. Currently, Self-Propelled Modular Transporter (SPMT) moves are being planned for three bridge replacement projects. This study goals are to advance the implementations by expanding scoping guidelines to include all ABC alternatives, standardize the bridge slides operations, and develop guidelines for foundation construction while an existing bridge is in service. The tasks completed during this project include (a) reviewing the ABC activities nationally and monitor ongoing ABC projects in Michigan, (b) defining scoping parameters for the implementation of SIBC and SPMT moves, (c) reviewing and evaluating substructure construction and upgrades, along with constructability of deep foundations while an existing bridge is in service, (d) developing specific cost methodologies for SIBC, SPMT moves, and foundation construction, and (e) developing recommendations for updating the multi-criteria decision-making process and the associated software platform by incorporating the updated framework and the cost-benefit analysis models, foundation construction while an existing bridge is in service, and improving SIBC implementations.

  • Accelerated Bridge Construction and Structural Move - Workshop
    2014
    Co-Authors: Haluk Aktan, Upul Attanayake, Abdul Wahed Mohammed
    Abstract:

    The Michigan Department of Transportation (MDOT) is committed to provide the highest level of safety and mobility during each step of a project’s development and delivery. To fulfil the above commitment, MDOT embraces technology and uses innovations. One such example is the implementation of the Accelerated Bridge Construction (ABC) project delivery process. MDOT is planning to implement the Slide-In and Self-Propelled Modular Transporter (SPMT) project delivery methods. MDOT foresees the future ABC projects to be design-bid-build; thus, they require the contracting industry and those delivering the projects to be knowledgeable of the methods. Also, this process requires the owners, in this case MDOT, to consider the means and methods that are required to complete an ABC project. ABC is a paradigm shift in bridge engineering and requires a change in bridge design engineers’ thinking process to that of a contractor. Hence, MDOT hosted the workshop on December 9, 2013 at the Williams Auditorium in Lansing, Michigan. The objective was to leverage knowledge and experience developed in other state highway agencies, and to encourage the involvement of local consultants, contractors, prefabricators, and other highway agencies during implementation of innovative project delivery techniques in Michigan. This report provides summaries of all the presentations and a strategic plan for promoting ABC in Michigan.

Upul Attanayake - One of the best experts on this subject based on the ideXlab platform.

  • Computational Framework for Predicting Accelerated Bridge Construction Technology Specific Costs and Benefits
    2016
    Co-Authors: Abdul Wahed Mohammed, Upul Attanayake, Corey Rogers, Haluk Aktan
    Abstract:

    Mobility impact time due to bridge construction is a major concern in terms of safety and user cost. Hence, accelerated bridge construction (ABC) technologies such as Self-Propelled Modular Transporter (SPMT) move and slide-in bridge construction (SIBC) or lateral slide are implemented. At present, during the maturing process of ABC, the emphasis is to standardize ABC and allow local contractors build experience. A major step towards standardization is to develop policies/tools for assisting bridge community in the project scoping process, wherein sites can be evaluated for ABC implementation. To address the need, the authors developed a decision-making model that incorporates cost models to evaluate specific ABC technologies for a site. Predicting costs for ABC specific activities and benefits is an essential part in the decision-making process. Recently, an SIBC cost estimation tool was developed under the Every Day Counts initiative of Federal Highway Administration (FHWA). The tool provides a total estimated SIBC cost; however, lacks providing itemized costs for SIBC activities and SPMT-specific cost estimation. Understanding the need, the authors developed a computational framework to predict costs and benefits for ABC technologies. The framework and its implementation are presented in this article. The costs are estimated based on data from past ABC projects in the US. When a statistically meaningful number of projects are implemented in a specific jurisdiction, the framework can be adopted seamlessly to evaluate costs and benefits of ABC implementation in that jurisdiction.

  • Research on Evaluation and Standardization of Accelerated Bridge Construction Techniques
    2015
    Co-Authors: Haluk Aktan, Upul Attanayake
    Abstract:

    The Michigan Department of Transportation (MDOT) uses Accelerated bridge construction (ABC) to reduce delays and minimize construction impacts. MDOT contracted and completed several bridges using prefabricated bridge elements and systems (PBES). In 2014, two slide-in bridge construction (SIBC) projects were contracted and completed. These two projects included three bridge replacements. Currently, Self-Propelled Modular Transporter (SPMT) moves are being planned for three bridge replacement projects. This study goals are to advance the implementations by expanding scoping guidelines to include all ABC alternatives, standardize the bridge slides operations, and develop guidelines for foundation construction while an existing bridge is in service. The tasks completed during this project include (a) reviewing the ABC activities nationally and monitor ongoing ABC projects in Michigan, (b) defining scoping parameters for the implementation of SIBC and SPMT moves, (c) reviewing and evaluating substructure construction and upgrades, along with constructability of deep foundations while an existing bridge is in service, (d) developing specific cost methodologies for SIBC, SPMT moves, and foundation construction, and (e) developing recommendations for updating the multi-criteria decision-making process and the associated software platform by incorporating the updated framework and the cost-benefit analysis models, foundation construction while an existing bridge is in service, and improving SIBC implementations.

  • Accelerated Bridge Construction and Structural Move - Workshop
    2014
    Co-Authors: Haluk Aktan, Upul Attanayake, Abdul Wahed Mohammed
    Abstract:

    The Michigan Department of Transportation (MDOT) is committed to provide the highest level of safety and mobility during each step of a project’s development and delivery. To fulfil the above commitment, MDOT embraces technology and uses innovations. One such example is the implementation of the Accelerated Bridge Construction (ABC) project delivery process. MDOT is planning to implement the Slide-In and Self-Propelled Modular Transporter (SPMT) project delivery methods. MDOT foresees the future ABC projects to be design-bid-build; thus, they require the contracting industry and those delivering the projects to be knowledgeable of the methods. Also, this process requires the owners, in this case MDOT, to consider the means and methods that are required to complete an ABC project. ABC is a paradigm shift in bridge engineering and requires a change in bridge design engineers’ thinking process to that of a contractor. Hence, MDOT hosted the workshop on December 9, 2013 at the Williams Auditorium in Lansing, Michigan. The objective was to leverage knowledge and experience developed in other state highway agencies, and to encourage the involvement of local consultants, contractors, prefabricators, and other highway agencies during implementation of innovative project delivery techniques in Michigan. This report provides summaries of all the presentations and a strategic plan for promoting ABC in Michigan.

Jagannath Mallela - One of the best experts on this subject based on the ideXlab platform.

  • One-Weekend Job: Rapid Removal and Replacement of 4500 South Bridge in Salt Lake City, Utah
    Transportation Research Record, 2010
    Co-Authors: Ahmad Ardani, Rukhsana Shana Lindsey, Jagannath Mallela
    Abstract:

    As part of a national initiative sponsored by FHWA under the Highways for LIFE program, the Utah Department of Transportation (DOT) was awarded a $1 million grant to demonstrate the use of proven, innovative technologies for accelerated bridge removal and replacement. This report documents accelerated bridge construction (ABC) techniques used to remove and replace the 4500 South Bridge on State Route 266 over Interstate 215 in Salt Lake City during a weekend. It includes construction details of the bridge superstructure built offsite on temporary abutments and prefabricated and cast-in-place bridge components and substructure built under the existing bridge without interfering with traffic flow. It also discusses use of a Self-Propelled Modular Transporter (SPMT) to remove the old bridge and to replace it with a new one. With conventional construction, the impact of this project on the traveling public was estimated at 120 days, but with accelerated construction techniques the impact was reduced to a sing...

Abdul Wahed Mohammed - One of the best experts on this subject based on the ideXlab platform.

  • Computational Framework for Predicting Accelerated Bridge Construction Technology Specific Costs and Benefits
    2016
    Co-Authors: Abdul Wahed Mohammed, Upul Attanayake, Corey Rogers, Haluk Aktan
    Abstract:

    Mobility impact time due to bridge construction is a major concern in terms of safety and user cost. Hence, accelerated bridge construction (ABC) technologies such as Self-Propelled Modular Transporter (SPMT) move and slide-in bridge construction (SIBC) or lateral slide are implemented. At present, during the maturing process of ABC, the emphasis is to standardize ABC and allow local contractors build experience. A major step towards standardization is to develop policies/tools for assisting bridge community in the project scoping process, wherein sites can be evaluated for ABC implementation. To address the need, the authors developed a decision-making model that incorporates cost models to evaluate specific ABC technologies for a site. Predicting costs for ABC specific activities and benefits is an essential part in the decision-making process. Recently, an SIBC cost estimation tool was developed under the Every Day Counts initiative of Federal Highway Administration (FHWA). The tool provides a total estimated SIBC cost; however, lacks providing itemized costs for SIBC activities and SPMT-specific cost estimation. Understanding the need, the authors developed a computational framework to predict costs and benefits for ABC technologies. The framework and its implementation are presented in this article. The costs are estimated based on data from past ABC projects in the US. When a statistically meaningful number of projects are implemented in a specific jurisdiction, the framework can be adopted seamlessly to evaluate costs and benefits of ABC implementation in that jurisdiction.

  • Accelerated Bridge Construction and Structural Move - Workshop
    2014
    Co-Authors: Haluk Aktan, Upul Attanayake, Abdul Wahed Mohammed
    Abstract:

    The Michigan Department of Transportation (MDOT) is committed to provide the highest level of safety and mobility during each step of a project’s development and delivery. To fulfil the above commitment, MDOT embraces technology and uses innovations. One such example is the implementation of the Accelerated Bridge Construction (ABC) project delivery process. MDOT is planning to implement the Slide-In and Self-Propelled Modular Transporter (SPMT) project delivery methods. MDOT foresees the future ABC projects to be design-bid-build; thus, they require the contracting industry and those delivering the projects to be knowledgeable of the methods. Also, this process requires the owners, in this case MDOT, to consider the means and methods that are required to complete an ABC project. ABC is a paradigm shift in bridge engineering and requires a change in bridge design engineers’ thinking process to that of a contractor. Hence, MDOT hosted the workshop on December 9, 2013 at the Williams Auditorium in Lansing, Michigan. The objective was to leverage knowledge and experience developed in other state highway agencies, and to encourage the involvement of local consultants, contractors, prefabricators, and other highway agencies during implementation of innovative project delivery techniques in Michigan. This report provides summaries of all the presentations and a strategic plan for promoting ABC in Michigan.

Yougang Tang - One of the best experts on this subject based on the ideXlab platform.

  • Optimization solutions for Self-Propelled Modular Transporter (SPMT) load-outs based on ballast simulation
    Ocean Engineering, 2020
    Co-Authors: Zhu Haiming, Du Zunfeng, Yougang Tang
    Abstract:

    Abstract This paper focuses on the optimization of Self-Propelled Modular Transporter (SPMT) load-outs. In common practice, a series of independent sub-systems are usually established based on the idea of multi-tasking. However, the conventional strategy features weak capability of finding globally optimal ballast solution thus has inefficient performance in actual applications. In this study, we developed a new ballast strategy with a unified ballast system. The strategy dynamically allocates ballast resources and compensates cargo loads as well as tide variation together by taking globally optimized ballast actions. On the basis of the proposed strategy, we established the approaches of ballast trials simulation, operation duration prediction and feasibility assessment for load-out plans. Then a simulation-based optimization method was developed to lower the time cost and prevent loading failures. In demonstration cases, the proposed ballast strategy was tested and proved to be able to reduce the time consumption by up to three quarters. The optimization method was applied in finding appropriate start time, barge and pumping capacity for particular projects. The above-mentioned optimization solutions can enhance the existing analysis workflow and help engineers make informed decisions.