Now showing items 1-20 of 67

    • Acceptance Procedures for New and Quality Control Procedures for Existing Types of Corrosion-Resistant Reinforcing Steel 

      Stephen R. Sharp; Larry J. Lundy; Harikrishnan Nair; Moen, Cristopher Dennis; Josiah B. Johnson; Sarver, Brian E. (Virginia Center for Transportation Innovation and Research, 2011-06-01), FHWA/VCTIR 11-R21
      As the Virginia Department of Transportation (VDOT) continues to move forward with implementing the use of corrosion-resistant reinforcing (CRR) bars, it is important for VDOT to have a means of characterizing the candidate ...
    • Access Control Design on Highway Interchanges 

      Hesham Rakha; Alejandra Medina Flintsch; Mazen Arafeh; Abdel-Salam Gomaa Abdel-Salam; Dhruv Dua; Abbas, Montasir (Virginia Center for Transportation Innovation and Research, 2008-01-01), VTRC 08-CR7
      The adequate spacing and design of access to crossroads in the vicinity of freeway ramps are critical to the safety and traffic operations of both the freeway and the crossroad. The research presented in this report develops ...
    • Anchorage Zone Design for Pretensioned Precast Bulb-T Bridge Girders in Virginia 

      E.D. Crispino; Cousins, Thomas E.; Roberts-Wollmann, Carin L. (Virginia Center for Transportation Innovation and Research, 2009-06-01), FHWA/VTRC 09-CR15
      Precast/prestressed concrete girders are commonly used in bridge construction in the United States. The application and diffusion of the prestress force in a pretensioned girder cause a vertical tension force to develop ...
    • Asphalt Materials Characterization in Support of Implementation of the Proposed Mechanistic-Empirical Pavement Design Guide 

      Flintsch, Gerardo W.; Loulizi, Amara; Stacey D. Diefenderfer; Khaled A. Galal; Diefenderfer, Brian K. (Virginia Center for Transportation Innovation and Research, 2007-01-01), VTRC 07-CR10
      The proposed Mechanistic-Empirical Pavement Design Guide (MEPDG) procedure is an improved methodology for pavement design and evaluation of paving materials. Since this new procedure depends heavily on the characterization ...
    • Assessment of the Performance of Several Roadway Mixes under Rain, Snow, and Winter Maintenance Activities 

      Flintsch, Gerardo W. (Virginia Center for Transportation Innovation and Research, 2004-02-01), VTRC 04-CR18
      The purpose of this study was to assess the relative functional performance, including skid resistance and splash and spray, of five hot-mix-asphalt (HMA) surfaces and a tinned portland cement concrete highway surface ...
    • Bridge Deck Service Life Prediction and Costs 

      Gregory Williamson; Weyers, Richard E.; Brown, Michael C.; Sprinkel, Michael M. (Virginia Center for Transportation Innovation and Research, 2007-12-01), VTRC 08-CR4
      The service life of Virginia's concrete bridge decks is generally controlled by chloride-induced corrosion of the reinforcing steel as a result of the application of winter maintenance deicing salts. A chloride corrosion ...
    • A Cellular Automata Approach to Estimate Incident-Related Travel Time on Interstate 66 in Near Real Time 

      Wang, Zhuojin; Murray-Tuite, Pamela M. (Virginia Center for Transportation Innovation and Research, 2010-03-01), VTRC 10-CR4
      Incidents account for a large portion of all congestion and a need clearly exists for tools to predict and estimate incident effects. This study examined (1) congestion back propagation to estimate the length of the queue ...
    • Characterization of the Punching Shear Capacity of Thin Ultra-High Performance Concrete Slabs 

      D.K. Harris; Roberts-Wollmann, Carin L. (Virginia Center for Transportation Innovation and Research, 2005-06-01), VTRC 05-CR26
      Ultra-high performance concrete (UHPC) is a relatively new type of concrete that exhibits mechanical properties that are far superior to those of conventional concrete and in some cases rival those of steel. The main ...
    • Classification of longitudinal welds in an aluminum bridge deck 

      Cousins, Thomas E.; Richard F. Hezel II; Jose P. Gomez (Virginia Center for Transportation Innovation and Research, 2002-02-01), VTRC 00-CR5
      An aluminum bridge deck (called ALUMADECK) has been developed by Reynolds Metal Company and is made of extruded aluminum sections welded together at the sides to form a bridge deck. The longitudinal welds used to connect ...
    • Composite action in a steel girder span with precast deck panels :the I-81 bridge over the New River in Radford, Virginia 

      Cousins, Thomas E. (Virginia Center for Transportation Innovation and Research, 2003-10-01), VTRC 04-R4
      Two parallel bridges carry I-81 north and south over the New River in southwest Virginia, near the city of Radford. The bridges are identical in design and have been in place since 1985. In recent years, a number of ...
    • Composite Pavement Systems: Synthesis of Design and Construction Practices 

      Flintsch, Gerardo W.; Diefenderfer, Brian K.; Orlando Nunez (Virginia Center for Transportation Innovation and Research, 2008-11-01), FHWA/VTRC 09-CR2
      Composite pavement systems have shown the potential for becoming a cost-effective pavement alternative for highways with high and heavy traffic volumes, especially in Europe. This study investigated the design and performance ...
    • Construction of a Virginia Short-Span Bridge with the Strongwell 36-Inch Double-Web I-Beam 

      Cousins, Thomas E.; Lesko, John J. (Virginia Center for Transportation Innovation and Research, 2005-10-01), FHWA/VTRC 06-CR5
      The Route 601 Bridge in Sugar Grove, VA, spans 39 ft over Dickey Creek. The bridge is the first to use the Strongwell 36-in-deep fiber-reinforced polymer (FRP) double-web beam (DWB) in a vehicular bridge superstructure. ...
    • Corrosion Protection Service Life of Epoxy-Coated Reinforcing Steel in Virginia Bridge Decks 

      Brown, Michael C.; Weyers, Richard E.; Megan C. Wheeler (Virginia Center for Transportation Innovation and Research, 2003-09-01), FHWA/VTRC 04-CR7
      The corrosion protection service life extension provided by epoxy-coated reinforcement (ECR) was determined by comparing ECR and bare steel bars from 10 Virginia bridge decks built between 1981 and 1995. The objective was ...
    • Creep of high-strength normal and lightweight concrete 

      Edward C. Vincent; Bradley D. Townsend; Weyers, Richard E. (Virginia Center for Transportation Innovation and Research, 2004-05-01), VTRC 04-CR8
      In addition to immediate elastic deformations, concrete undergoes time-dependent deformations that must be considered in design. Creep is defined as the time-dependent deformation resulting from a sustained stress. Shrinkage ...
    • Design of Bridging Layers in Geosynthetic-Reinforced, Column-Supported Embankments 

      Filz, George M.; Miriam E. Smith (Virginia Center for Transportation Innovation and Research, 2006-04-01), VTRC 06-CR12
      The cost of column-supported embankments depends, in part, on the spacing between the columns and the size of the columns and pile caps. Geosynthetic reinforcement is often employed in bridging layers to enhance load ...
    • Design Recommendations for the Optimized Continuity Diaphragm for Prestressed Concrete Bulb-T Beams 

      Koch, Stephanie; Roberts-Wollmann, Carin L. (Virginia Center for Transportation Innovation and Research, 2008-11-01), FHWA/VTRC 09-CR1
      This research focused on prestressed concrete bulb-T (PCBT) beams made composite with a cast-in-place concrete deck and continuous over several spans through the use of continuity diaphragms. The current design procedure ...
    • Determination of remaining fatigue life of welded stud details on overhead aluminum sign panels in Virginia 

      Cousins, Thomas E.; Lucas, Jeremy L. (Virginia Center for Transportation Innovation and Research, 2005-03-01), VTRC 05-CR10
      Some overhead highways signs in Virginia using a specific welded threaded stud and clip connection have failed while in service. From inspection of the signs it was determined that the failure was caused by fatigue of the ...
    • Determination of the In-Place Hot-Mix Asphalt Layer Modulus for Rehabilitation Projects Using a Mechanistic-Empirical Procedure 

      Loulizi, Amara; Flintsch, Gerardo W.; McGhee, Kevin K. (Virginia Center for Transportation Innovation and Research, 2006-07-01), FHWA/VTRC 07-CR1
      This project evaluated the procedures proposed by the Mechanistic-Empirical Pavement Design Guide (MEPDG) to characterize existing hot-mix asphalt (HMA) layers for rehabilitation purposes. Thirty-three cores were extracted ...
    • Developing a Network-Level Structural Capacity Index for Structural Evaluation of Pavements 

      J. Bryce; G.W. Flintsch; Katicha, Samer W.; B.K. Diefenderfer (Virginia Center for Transportation Innovation and Research, 2013-03-01), VCTIR 13-R9
      The objective of this project was to develop a structural index for use in network-level pavement evaluation to facilitate the inclusion of the pavement's structural condition in pavement management applications. The primary ...
    • Development and Evaluation of an Adhesively Bonded Panel-to-Panel Joint for a Fiber-Reinforced Polymer Bridge Deck System 

      Zihong Liu; Prasun K. Majumdar; Tommy Cousins; Lesko, John J. (Virginia Center for Transportation Innovation and Research, 2007-04-01), FHWA/VTRC 07-CR14
      A fiber-reinforced polymer (FRP) composite cellular deck system was used to rehabilitate a historical cast iron thru-truss structure (Hawthorne Street Bridge in Covington, Virginia). The most important characteristic of ...