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Outline FHWA/AASHTO/NCHRP International and Domestic Scan

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Presentation on theme: "Outline FHWA/AASHTO/NCHRP International and Domestic Scan"— Presentation transcript:

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2 Outline FHWA/AASHTO/NCHRP International and Domestic Scan
FHWA Research Update State Research Update TRB Research Update SHRP2 NCHRP

3 Superstructure Systems Deck Systems Substructure Systems
FHWA/ AASHTO/ NCHRP 20-36: Prefabricated Bridge Elements and Systems in Japan and Europe (2004) Movement System Superstructure Systems Deck Systems Substructure Systems the team identified 10 overall technologies that it recommends for possible, immediate implementation in the United States. Movement System: Self-Propelled Modular Transporters Other Bridge Installation Systems Superstructure Systems Poutre Dalle System Partial-Depth Concrete Decks Prefabricated on Steel or Concrete Beams U-Shaped Segments with Transverse Ribs Deck Systems Full-Depth Prefabricated Concrete Decks Deck Joint Closure Details Hybrid Steel-Concrete Deck Systems Multiple-Level Corrosion Protection Systems Substructure Systems SPER System

4 Scan 07-02 Best Practices in Accelerated Construction Techniques (2008)
Best practices highlighted by the accelerated construction scan include success stories in the areas of partnering, design, planning, and contracting strategies

5 Extreme load consideration for bridges and ABC connections
Best Practices Regarding Performance of ABC Connections in Bridges Subjected To Multi-Hazard and Extreme Events(2012) Scan 11-02: Summary of Initial Findings – 8 Topic Areas: Extreme load consideration for bridges and ABC connections ABC connection details ABC connection maintenance Standardization of ABC connection details and processes

6 ABC connection research Innovative ABC connections
Best Practices Regarding Performance of ABC Connections in Bridges Subjected To Multi-Hazard and Extreme Events ABC connection research Innovative ABC connections Monitoring ABC connections and prefabricated bridge elements and systems Other findings

7 Federal Highway Administration Research Update

8 Federal Highway Administration (FHWA) Research Related to ABC
Highways for LIFE demonstration projects: Precast segmental bridge bent system in high seismic region of Washington State FRP deck panels for movable bridges County Project in NY this spring

9 ABC/PBES Connections Dr. Benjamin Graybeal
Address field-cast connection shortcomings by recommending best practices based on quantitative physical testing Wide ranging laboratory investigation Full-scale tests (box beams, deck-bulb-tees, etc.) Subcomponent tests (deck panels, etc.) Mechanical tests (cubes, prisms, etc.) Durability tests (F/T, etc.) Stability tests (shrinkage)

10 Modular Component Connection Research
Focus on simple connections that use better “grouts” Assess initial, service, and ultimate performance Seven different materials are being compared for use in connections High strength, low shrinkage grouts Epoxy grout UHPC Tendon grout Magnesium ammonium phosphate grout Typical deck concrete

11 Lightweight HPC Structural Performance
Focus on gap in density between LW and NW Testing complete. Working with AASHTO SCOBS T-10 to compile state-of-knowledge then propose specification revisions. 5 In-depth studies Transfer & development length for PC girders Shear strength of PC girders Development of mild steel reinforcement Prestress losses Materials characterization

12 Ultra-High Performance Concrete
Provide new solutions to existing and anticipated problems in our highway infrastructure Strong DOT interest in UHPC for PBES connections Ongoing Efforts: Assist State DOTs in UHPC deployment activities Develop/test optimal PBES connection concepts Develop QA/QC test methodology Address Buy America requirements

13 2009 NYSDOT UHPC Joint Construction
Route 31 over Canandaigua Outlet

14 Increased Shear Stud Spacing for ABC
This project will determine if clustered stud spacing at 12, 24, 36, and 48 inches produced different static and fatigue behavior.

15 UHPC Composite Connection
Steel Girder Connection Concrete Girder Connection

16 LRFD for GRS, Dr. Jennifer Nicks
Update the resistance factors for reinforcement strength and vertical capacity of a GRS composite mass. Evaluate previous performance test data and conduct new performance tests on different material Evaluate the results of shake table tests Performing a reliability analysis to develop LRFD

17 Systems Design Methodology for Approach/Abutment/Backwall Integration, Mike Adams
Establish why a bridge built on a GRS-IBS can be in-service for more than 5 years without developing a pavement crack at the abutment approach interface Define the mechanics of passive earth pressure against a GRS approach Determine thermally induced substructure/superstructure interaction Apply the result of this work to the design of bridges on integral abutments

18 Seismic Performance of GRS Walls and Abutments, Mike Adams
The "no seismic analysis option" just passed in AASTHO for certain MSE walls does not apply for abutment applications Evaluate NCHRP and TPF research to determine if Section 11 should be updated

19 Design and Construction
GRS-IBS Interim Implementation Guide Design and Construction Guidance Synthesis Report Research and Background Geosynthetic Reinforced Soil – Integrated Bridge System

20 State Research Update

21 Accelerated Bridge Construction Decision & Economic Modeling Tool
Compares ABC & conventional construction Helps analyze different alternatives & determine which construction approach is preferred for a specific bridge project Transportation Pooled Fund Study TPF-5(221) Completion Date: June 2011 Participating: Oregon (lead), California, Iowa, Minnesota, Montana, Texas, Utah, Washington, FHWA PI: Toni Doolen, Oregon State University Project Manager: Benjamin Tang, P.E.,Oregon Department of Transportation

22 State-Sponsored ABC Research Partial Listing
New York State DOT Washington State DOT Virginia Tech – full-depth deck panel research Virginia Center for Transportation Innovation and Research (VCTIR) – 2011 Laboratory Investigation of Lightweight Concrete Properties Texas DOT – 2001 Research Project on Development of a Precast Bent Cap System

23 NCHRP Research Projects Update

24 NCHRP Report 519: Connection Between Simple-Span Precast Concrete Girders Made Continuous
Recommended details and specifications for the design of continuity connections for precast concrete girders Examples illustrating the design of four precast girder types made continuous for live load

25 NCHRP Report 584: Full-Depth, Precast-Concrete Bridge Deck Panel Systems
Recommended guidelines and AASHTO LRFD Specifications language for design, fabrication, and construction of full-depth, precast-concrete bridge deck panel systems.  Developed durable and rapidly constructed connections between panels

26 NCHRP Project : Design and Construction Guidelines for Long-Span Decked Precast, Prestressed Concrete Girder Bridges Provides guidelines for the design and construction of decked precast, prestressed concrete girder bridges

27 PCSSS Precast Inverted-T Cross Section
NCHRP Web-Only Document 173: Cast-in-Place Concrete Connections for Precast Deck Systems PCSSS Precast Inverted-T Cross Section

28 NCHRP Web-Only Document 173: Cast-in-Place Concrete Connections for Precast Deck Systems
A Typical DBT Bridge Connected by Longitudinal Joints with Welded Steel Connectors

29 Longitudinal Joint Specimen Before and After Grouting
NCHRP Web-Only Document 173: Cast-in-Place Concrete Connections for Precast Deck Systems Longitudinal Joint Specimen Before and After Grouting

30 Series of recommended updates to the:
NCHRP Report 681: Development of Precast Bent Cap Systems for Seismic Regions Series of recommended updates to the: AASHTO LRFD Bridge Design Specifications Guide Specification for LRFD Seismic Bridge Design AASHTO LRFD Bridge Construction Specifications In addition to: Design Flow Charts and Design Examples Example Connection Details

31 Non-Integral, Emulative: Grouted Duct
NCHRP Report 681: Development of Precast Bent Cap Systems for Seismic Regions Metallic ducts are left embedded in the cap at the column joint for anchoring the column longitudinal reinforcement Requires strict tolerances, use of templates are necessary Flowable grout is pumped from below Careful sealing of the cap-column joint is required to resist the hydraulic head pressure Always be prepared to abort the grouting operation, clean and regrout Non-Integral, Emulative: Grouted Duct

32 Non-Integral, Emulative: Cap Pocket Full Ductility
NCHRP Report 681: Development of Precast Bent Cap Systems for Seismic Regions Corrugated steel pipes are left embedded in the cap at the column as permanent form and joint reinforcement Ample tolerances Small aggregate with good workability is placed from the top Non-Integral, Emulative: Cap Pocket Full Ductility

33 Non-Integral, Hybrid: Steel Shell
NCHRP Report 681: Development of Precast Bent Cap Systems for Seismic Regions Shell acts as longitudinal and transverse reinforcement Non-Integral, Hybrid: Steel Shell

34 Non-Integral, Hybrid: Dual Steel Shell
NCHRP Report 681: Development of Precast Bent Cap Systems for Seismic Regions Both Shells act as longitudinal and transverse reinforcement Non-Integral, Hybrid: Dual Steel Shell

35 Detailed Evaluation of Connection Types: Bar Coupler Connections
NCHRP Report 698: Synthesis on System Performance of ABC Connections in Moderate-to-High Seismic Regions Detailed Evaluation of Connection Types: Bar Coupler Connections Grouted Duct Connections Pocket Connections Member Socket Connections Hybrid Connections Integral Connections Emerging Technology and Deformable Element Connections

36 NCHRP FY 2013 Research Projects Related to ABC
NCHRP Project 12-96: Simplified Full-Depth Precast Concrete Deck Panel Systems NCHRP Project 12-95: Design Guidelines for Connection Details of Adjacent Precast Concrete Box Beam Bridges

37 NCHRP FY 2014 Submitted Problem Statement related to ABC
Problem statement C-09: Guidelines for Tolerances for Prefabricated Bridge Elements and Systems Problem statement C-10: Guidelines for Calculating Dynamic Effects in Large-Scale Bridge Moves Problem statement C-22: Development of an Accelerated Bridge Construction (ABC) Design and Construction Guide Specification

38 ABC Research Needs More validated options for connection details, especially in high seismic regions Acceptance criteria for grouted sleeve connectors Fatigue tests to ensure durability of cast- in-place deck joints Crash testing of prefabricated barriers

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