Project Number Project Title Stage Comments
NCHRP 12-100Guidelines for Maintaining Small Movement Bridge Expansion JointsFinalPublished as AASHTO Guidelines for Maintaining Small Movement Bridge Expansion Joints, 1st Edition
NCHRP 12-101Seismic Evaluation of Bridge Columns with Energy Dissipating MechanismsFinalTwo Volumes: Volume 1: Research Overview and Volume 2: Guidelines
NCHRP 12-102Recommended AASHTO Guide Specification for ABC Design and ConstructionFinal
NCHRP 12-102AAASHTO Guide Specification for ABC Design and Construction--Implementation WorkshopsFinalThe agency’s training modules are available for download.
NCHRP 12-103Bridge Superstructure Tolerance to Total and Differential Foundation MovementsFinal
NCHRP 12-104Guidelines to Improve the Quality of Element-Level Bridge Inspection DataFinal
NCHRP 12-105Proposed AASHTO Seismic Specifications for ABC Column Connections Final
NCHRP 12-106Proposed Guidelines for Performance-Based Seismic Bridge DesignFinal
NCHRP 12-107Proposed AASHTO Bridge Guidelines for Use of ASTM A1010 SteelFinalAASHTO Special Committee on Research and Innovation (R&I) decided to cancel this project and reallocate project funds to other NCHRP projects
NCHRP 12-108Guide Specification for Service Life Design of Highway BridgesFinal
NCHRP 12-109Use of 0.7-in. Diameter Strands in Precast Pretensioned GirdersFinalPublished as NCHRP Research Report 994
NCHRP 12-110Proposed New AASHTO Load Rating Provisions for Implements of HusbandryFinal
NCHRP 12-111Evaluating the Effectiveness of Vibration-Mitigation Devices for Structural Supports of Signs, Luminaires, and Traffic SignalsFinalFinal Contractor's Report is available on the project webpage.
NCHRP 12-112Update of the AASHTO LRFD Movable Highway Bridge Design SpecificationsFinal
NCHRP 12-113Proposed Modification to AASHTO Cross-Frame Analysis and DesignFinalPhase I is published as NCHRP Research Report 962. Phase II is published as NCHRP Research Report 1045.
NCHRP 12-114Guidance on Seismic Site Response Analysis with Pore Water Pressure GenerationFinalThe final deliverable has been published as NCHRP Report 1092 and NCHRP Web-Only Document 383
NCHRP 12-115Guidelines for Risk-Based Inspection and Strength Evaluation of Suspension Bridge Main Cable SystemsFinalThe Final Report has been published as NCHRP Web-Only Document 353. The Guidelines have been forwarded to AASHTO COBS Technical Committee on Bridge Management.
NCHRP 12-116Proposed AASHTO Specifications for Design of Piles for DowndragFinalFurther work will be conducted under NCHRP 12-116A in 2020
NCHRP 12-116AProposed AASHTO Specifications for Design of Piles for DowndragCompletedThe final deliverables have been received. A publication decision is pending.
NCHRP 12-117Guidelines for Corrosion Protection of Steel Bridges Using Duplex Coating SystemsFinalThe Final Report is published as NCHRP Report 1048. The Guidelines have been forwarded to AASHTO COBS Technical Committee on Bridge Preservation
NCHRP 12-118Design and Construction Specifications for Bonded and Unbonded Post-Tensioned Concrete Bridge ElementsActive
NCHRP 12-119MASH Railing Load Requirements for Bridge Deck OverhangFinalPublished as NCHRP Research Report 1078
NCHRP 12-120Stainless Steel Strands for Prestressed Concrete Bridge ElementsActiveResearch In Progress
NCHRP 12-121Guidelines for the Design of Prestressed Concrete Bridge Girders Using FRP Auxiliary ReinforcementActiveResearch In Progress
NCHRP 12-122Proposed AASHTO Guidelines for Applications of Unmanned Aerial Systems Technologies for Element-Level Bridge InspectionCompletedThe final deliverables have been received. A publication decision is pending.
NCHRP 12-123Proposed AASHTO Guideline for Load Rating of Segmental BridgesActiveResearch In Progress
NCHRP 12-124Design of Stud Shear Connectors in Composite Steel BridgesActiveResearch In Progress
NCHRP 12-125Earthquake-Induced Bridge DisplacementsActiveResearch In Progress
NCHRP 12-126Design and Testing of High-Load Multi-Rotational Disc Bearings for BridgesPendingA research agency has been selected for the project. The contracting process is underway.
NCHRP 12-127Load Rating and Posting of Long-Span BridgesPending
NCHRP 12-15(5)Fatigue Behavior of Variable Loaded Bridge Details Near the Fatigue LimitFinal
NCHRP 12-23Recommended Revisions to the AASHTO Manual for Maintenance Inspection of BridgesCompleted
NCHRP 12-26(2)Distribution of Wheel Loads on Highway BridgesCompleted
NCHRP 12-27Welded Repair of Cracks in Steel Bridge MembersCompleted
NCHRP 12-28(01)Load Capacity Evaluation of Existing BridgesCompleted
NCHRP 12-28(02)Bridge Management SystemsCompleted
NCHRP 12-28(02)ABridge Management Systems SoftwareCompleted
NCHRP 12-28(02)BBridge Management Systems SoftwareCompleted
NCHRP 12-28(02)CConversion of BRIDGIT Bridge Management Software to WindowsCompleted
NCHRP 12-28(03)Fatigue Evaluation Procedures for Steel BridgesCompleted
NCHRP 12-28(06)Distortion-Induced Fatigue Cracking in Steel BridgesCompleted
NCHRP 12-28(07)Guidelines for Evaluating Corrosion Effects in Existing Steel BridgesCompleted
NCHRP 12-28(10)Guidelines for Determining Redundancy in Steel BridgesCompleted
NCHRP 12-28(11)Development of Site-Specific Load Models for Bridge RatingCompleted
NCHRP 12-28(12)Inelastic Rating Procedures for Steel Beam and Girder BridgesCompleted
NCHRP 12-28(13)Nondestructive Load Testing for Bridge Evaluation and RatingCompleted
NCHRP 12-28(13)A Bridge Rating Through Nondestructive Load TestingCompleted
NCHRP 12-29Design of Simple-Span Precast Prestressed Bridge Girders Made ContinuousCompleted
NCHRP 12-30Fatigue of Cables in Cable-Stayed BridgesCompleted
NCHRP 12-31Notch Toughness Variability in Bridge Steel PlatesFinal
NCHRP 12-33Development of a Comprehensive Bridge Specification and CommentaryCompleted
NCHRP 12-33ADevelopment of a Comprehensive Bridge Specification and Commentary---Timber Structures and Code CalibrationCompleted
NCHRP 12-33BDevelopment of a Comprehensive Bridge Specification and Commentary---Concrete StructuresCompleted
NCHRP 12-33CDevelopment of a Comprehensive Bridge Specification and Commentary---Soil-Structure Interaction SystemsCompleted
NCHRP 12-34Update of AASHTO Standard Specifications for Highway Bridges: Division II---ConstructionCompleted
NCHRP 12-35Recommended Specifications for the Design of Foundations, Retaining Walls, and SubstructuresCompleted
NCHRP 12-36Redundancy in Highway Bridge SuperstructuresCompleted
NCHRP 12-36(2)Redundancy in Highway Bridge Superstructures: Phase 2Completed
NCHRP 12-37Transverse Cracking in Newly Constructed Bridge DecksCompleted
NCHRP 12-38Improved Design Specifications for Horizontally Curved Steel Girder Highway BridgesCompleted
NCHRP 12-39Design Specifications for Debris Forces on Highway BridgesCompleted
NCHRP 12-40Fatigue Criteria for Modular Bridge Expansion JointsFinal
NCHRP 12-41Rapid Replacement of Bridge DecksCompleted
NCHRP 12-42LRFD Bridge Design Specifications SupportCompleted
NCHRP 12-43Life-Cycle Cost Analysis for BridgesCompleted
NCHRP 12-44Recommended Specifications for the Design of Movable Highway BridgesCompleted
NCHRP 12-45Recommended Specifications for Large-Span CulvertsCompleted
NCHRP 12-46Manual for Condition Evaluation and Load Rating of Highway Bridges Using Load and Resistance Factor PhilosophyCompleted
NCHRP 12-47Redundancy in Highway Bridge SubstructuresCompleted
NCHRP 12-48Design of Highway Bridges for Extreme EventsCompleted
NCHRP 12-49Comprehensive Specification for the Seismic Design of BridgesCompleted
NCHRP 12-50Bridge Software-Validation Guidelines and ExamplesCompleted
NCHRP 12-51Effect of Truck Weight on Bridge Network CostsCompleted
NCHRP 12-52LRFD Specifications for Horizontally Curved Steel Girder Highway BridgesCompleted
NCHRP 12-53Connection Between Simple-Span Precast Concrete Girders Made ContinuousCompleted
NCHRP 12-54Integral Connections of Steel Bridge StructuresCompleted
NCHRP 12-55Load and Resistance Factors for Earth Pressures on Bridge Substructures and Retaining WallsCompleted
NCHRP 12-55ALoad and Resistance Factors for Earth Pressures on Bridge Substructures and Retaining WallsCompleted
NCHRP 12-56Application of the LRFD Bridge Design Specifications to High-Strength Structural Concrete: Shear ProvisionsCompleted
NCHRP 12-57Extending Span Ranges of Precast, Prestressed Concrete GirdersCompleted
NCHRP 12-58Effective Slab Width for Composite Steel Bridge MembersCompleted
NCHRP 12-59Design and Construction of Geosynthetic-Reinforced Soil (GRS) Abutments for Bridge SupportCompletedNCHRP Report 556: Design and Construction Guidelines for Geosynthetic-Reinforced Soil Bridge Abutments with a Flexible Facing
NCHRP 12-59(01)Seismic Design of Geosynthetic-Reinforced Soil (GRS) Bridge Abutments with Flexible FacingCompleted
NCHRP 12-60Transfer, Development, and Splice Length for Strand/Reinforcement in High-Strength ConcreteCompleted
NCHRP 12-61Simplified Shear Design of Structural Concrete MembersCompleted
NCHRP 12-62Simplified Live-Load Distribution-Factor EquationsCompleted
NCHRP 12-62ASimplified Live Load Distribution-Factor Equations-Phase IICompleted
NCHRP 12-63Legal Truck Loads and AASHTO Legal Loads for PostingCompleted
NCHRP 12-64Application of the LRFD Bridge Design Specifications to High-Strength Structural Concrete: Flexure and Compression ProvisionsCompleted
NCHRP 12-65Full-Depth, Precast-Concrete Bridge Deck Panel SystemsCompleted
NCHRP 12-66AASHTO LRFD Specifications for Serviceability in the Design of Bridge FoundationsFinalContract was terminated on October 24, 2008
NCHRP 12-67Multiple-Objective Optimization for Bridge Management SystemsCompleted
NCHRP 12-68Improved Rotational Limits of Elastomeric BearingsCompleted
NCHRP 12-69Design and Construction Guidelines for Long-Span Decked Precast, Prestressed Concrete Girder BridgesCompleted
NCHRP 12-70Seismic Analysis and Design of Retaining Walls, Buried Structures, Slopes, and EmbankmentsFinal
NCHRP 12-71Design Specifications and Commentary for Horizontally Curved Concrete Box-Girder Highway BridgesCompleted
NCHRP 12-72Blast-Resistant Highway Bridges: Design and Detailing GuidelinesFinal
NCHRP 12-73Design Guidelines for Durability of Bonded CFRP Repair/Strengthening of Concrete BeamsCompleted
NCHRP 12-74Development of Precast Bent Cap Systems for Seismic RegionsFinal
NCHRP 12-75Design of FRP Systems for Strengthening Concrete Girders in ShearCompleted
NCHRP 12-76Protocols for Collecting and Using Traffic Data in Bridge DesignFinal
NCHRP 12-77Structural Concrete Design with High-Strength Steel ReinforcementFinal
NCHRP 12-78Evaluation of Load Rating by Load and Resistance Factor RatingFinal
NCHRP 12-79Guidelines for Analytical Methods and Erection Engineering of Curved and Skewed Steel Deck-Girder BridgesFinalPublished as NCHRP Report 725
NCHRP 12-80LRFD Minimum Flexural Reinforcement RequirementsFinal
NCHRP 12-81Evaluation of Fatigue on the Serviceability of Highway BridgesFinalPublished as NCHRP Report 721
NCHRP 12-82Developing Reliability-Based Bridge Inspection PracticesFinalNCHRP 12-82(01)—Phase II started on November 26, 2012 and has an anticipated termination date of March 25, 2014. Phase II Funds is $149,542
NCHRP 12-82(01)Developing Reliability-Based Bridge Inspection Practices: Case StudiesFinal
NCHRP 12-83Calibration of LRFD Concrete Bridge Design Specifications for ServiceabilityFinal
NCHRP 12-84Guidelines for the Load and Resistance Factor Design and Rating of Riveted and Bolted Gusset-Plate Connections for Steel BridgesFinal
NCHRP 12-85Highway Bridge Fire Hazard AssessmentFinalThe agency's final deliverables are available for download
NCHRP 12-86Bridge System Safety and RedundancyFinal
NCHRP 12-87Fracture-Critical System Analysis for Steel BridgesFinal
NCHRP 12-87AFracture-Critical System Analysis for Steel BridgesFinal
NCHRP 12-88Synthesis on System Performance of Accelerated Bridge Construction Connections in Moderate-to-High Seismic RegionsFinal
NCHRP 12-89Recommended AASHTO LRFD Tunnel Design and Construction SpecificationsFinal
NCHRP 12-90Guidelines for Shielding Bridge Piers FinalThe research report published as NCHRP Research Report 892
NCHRP 12-91Strand Debonding for Pretensioned GirdersFinal
NCHRP 12-92Proposed LRFD Bridge Design Specifications for Light Rail Transit LoadsFinal
NCHRP 12-93Contribution of Steel Casing to Single Shaft Foundation Structural ResistanceFinal
NCHRP 12-94LRFD Minimum Flexural Reinforcement RequirementsFinal
NCHRP 12-95Connection Details of Adjacent Precast Concrete Box Beam Bridges FinalA decision was made to discontinue work on the project beyond Phase I. The remaining work will be conducted in 2017 under NCHRP 12-95A.
NCHRP 12-95AProposed AASHTO Guidelines for Adjacent Precast Concrete Box Beam Bridge SystemsFinalThe final deliverable has been published as NCHRP Report 1026
NCHRP 12-96Simplified Full-Depth Precast Concrete Deck Panel Systems Final
NCHRP 12-97Guide Specification for the Design of Concrete Bridge Beams Prestressed with CFRP SystemsCompleted
NCHRP 12-98Recommended Guidelines for Prefabricated Bridge Elements and Systems Tolerances and Dynamic Effects of Bridge MovesFinal
NCHRP 12-99Guidelines for Calculating Dynamic Effects in Large-Scale Bridge MovesFinalNCHRP Project 12-98 has been expanded in scope and budget to include this project.