nchrp bridge researchnchrp bridge researchctgttp.edu.free.fr/trungweb/tc tk cau 22 tcn 272 - 05/giai...

NCHRPNCHRP 1

NCHRP Bridge ResearchNCHRP Bridge Research

Report to

AASHTO Highway Subcommitteeon Bridges and Structures

National Cooperative Highway Research ProgramTransportation Research Board

June 2005

NCHRPNCHRP 2

OverviewOverview

NCHRP ProductsProgram DescriptionFY 2006 ProgramActive ProjectsRecent Reports

NCHRPNCHRP 3

Application of NCHRP BridgeApplication of NCHRP BridgeProductsProducts

2005 Agenda2005 Agenda4 Ballot Items reference 3 NCHRP Projectsor Reports

NCHRP Projects 12-63, 10-38 (Report 469), &24-17 (Report 507)

NCHRPNCHRP 4

Coming NCHRP Bridge ProductsComing NCHRP Bridge Products

NCHRP 12NCHRP 12--5252 –LRFD specifications for the design andconstruction of horizontally curved steel girderbridges.

NCHRPNCHRP 5

Coming NCHRP Bridge ProductsComing NCHRP Bridge Products

NCHRP 12NCHRP 12--5858 (Report 543)(Report 543)Recommended effective slab width ofcomposite steel bridge members.

NCHRP 12NCHRP 12--6161Simplified shear design procedures forconcrete members.

NCHRPNCHRP 6

Coming NCHRP Bridge ProductsComing NCHRP Bridge Products

NCHRP 12NCHRP 12--6262Recommended LRFD live-load distribution-factor design equationsNCHRP 12NCHRP 12--6363Recommend revisions to the legal loads forposting

NCHRPNCHRP 7

Coming NCHRP Bridge ProductsComing NCHRP Bridge Products

NCHRP 12NCHRP 12--5656Extension of LRFD Specifications to 18 ksi forshearNCHRP 12NCHRP 12--6060Extension of LRFD Specifications to 18 ksi fortransfer, development, and splice lengthNCHRP 12NCHRP 12--6464Extension of LRFD Specifications to 18 ksi forflexure and compression

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The National AcademiesThe National Academies

National Academy ofSciencesNational Academy ofEngineeringInstitute of Medicine

National Research Council

The Keck CenterThe Keck Center North

NCHRPNCHRP 9

Overview of NCHRP ProcessOverview of NCHRP Process

Program Selection - AASHTOProgram Funding - FHWA/StatesProgram Administration- NCHRP

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Program SelectionProgram SelectionAASHTOAASHTO

Problem StatementsStanding Committee on ResearchStates Ballot - 2/3 must approve project

Project Panel Members

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0

2

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96 97 98 99 00 01 02 03 04 05 06

Program Year

Nom

inee

sp

erP

anel

Federal AgencyState AgencyUniversity

Others

NCHRPNCHRP 12

Program FundingProgram FundingFHWAFHWA

States Voluntary Contributions» AASHTO negotiated agreement with

States» 5-1/2% of SPR funds» FHWA administers funds

NCHRPNCHRP 13

Program AdministrationProgram AdministrationNCHRPNCHRP

Set Up Project PanelsDevelop Project Statements (RFP)Contract with Research AgencyProject Surveillance

NCHRPNCHRP 14

FY 2006 ProgramFY 2006 Program

FY 2004 $25,311,000(+ $ 4,600,000 Unfunded Contingencies)

FY 2005 $27,525,000(All Contingencies were funded)

FY 2006FY 2006 $27,615,000$27,615,000(+ $ 4,900,000 Unfunded Contingencies)

NCHRPNCHRP 15

FY 2006 ProgramFY 2006 Program

Continuation Projects– 21 Projects $ 10,275,000– 0 Bridge Related

New Projects– 38 Total $17,340,000– 8 Bridge Interest $ 4,800,000

NCHRPNCHRP 16

NCHRP Bridge FundingNCHRP Bridge Funding

$0

$1

$2

$3

$4

$5

$6

1994

1996

1998

2000

2002

2004

2006

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FY 2006 ProgramFY 2006 ProgramNew ProjectsNew Projects

•• 1010--7070 Fatigue Testing for CantileverTraffic Signal and Sign StructureConnection Details $800,000 (Your #1Priority)

•• 1010--7171 Evaluation of CIP ReinforcedJoints for Full-Depth Precast ConcreteBridge Decks $750,000 (#4 Priority ofEvaluation Panel)

NCHRPNCHRP 18

FY 2006 ProgramFY 2006 ProgramNew ProjectsNew Projects

•• 1010--7272 Bridge Deck TestingSpecification $500,000 (Your #3 Priority)

•• 1212--7575 Behavior and Design ofConcrete Girders Strengthened in Shearwith CFRP Laminates $500,000 (Your #6Priority)

NCHRPNCHRP 19

FY 2006 ProgramFY 2006 ProgramNew ProjectsNew Projects

•• 1212--7676 Assessment of Truck Traffic onHighway Bridges $400,000 (Medium Priority)

•• 2424--3030 Improving the Lateral Capacityof Highway Bridge Foundations in WeakSoils $500,000 (Your #4Priority)

NCHRPNCHRP 20

FY 2006 ProgramFY 2006 ProgramNew ProjectsNew Projects

•• Your #2 PriorityYour #2 Priority Guidelines and Detailsfor Converting Jointed to JointlessBridges

•• Your #5 Priority was a 2005Your #5 Priority was a 2005Contingency initiated as 12Contingency initiated as 12--7474Development of a Precast Bent CapSystem for Seismic Regions

NCHRPNCHRP 21

FY 2006 ProgramFY 2006 ProgramNew ProjectsNew Projects

•• 2424--2828 Reliability of Metal Loss &Service-Life Estimates for Metal-Tensioned Systems in GeotechnicalApplications $600,000

•• 2424--2929 Effects of Fractured orDegradable Rock on Pier Scour atBridges $750,000

NCHRPNCHRP 22

2020--07 Research for the07 Research for theAASHTO Standing CommitteeAASHTO Standing Committee

on Highwayson Highways$1,000,000 FY 2006 FundingAASHTO Highway Committee or

Subcommittees of SCOH can requestTask funding

20-07 panel selects tasks biannually Informally appointed Task panels

NCHRPNCHRP 23

2020--05 Synthesis05 Synthesis

Managed Within TRB, but outsideNCHRP

$1,200,000 FY 2006 FundsTopics selected by 20-05 panel Informally appointed topic panels

NCHRPNCHRP 24

Grand ChallengesGrand Challenges1. EXTENDING SERVICE LIFE2. OPTIMIZING STRUCTURAL SYSTEMS3. ACCELERATING BRIDGE

CONSTRUCTION4. ADVANCING THE AASHTO

SPECIFICATIONS5. MONITORING BRIDGE CONDITION6. CONTRIBUTING TO NATIONAL POLICY7. MANAGING KNOWLEDGE

NCHRPNCHRP 25

The Riemann HypothesisThe Riemann Hypothesis

The German mathematician G.F.B.Riemann (1826-1866) observed that thefrequency of prime numbers is related tothe behavior of the function

ζ(s) = 1 + 1/2s + 1/3s + 1/4s + ...called the Riemann Zeta function.The Riemann hypothesis asserts that allnontrivial solutions of the equation

ζ(s) = 0have real part equal to ½.

NCHRPNCHRP 26

46 Projects of Interest

>$21,900,000

Active ProjectsActive Projects

NCHRPNCHRP 27

Recent ReportsRecent Reports

534534 Guidelines for Inspectionand Strength Evaluations ofSuspension Bridge Parallel-WireCables

543543 Effective Slab Width forComposite Steel Bridge Members

NCHRPNCHRP 28

Web SitesWeb Sites

NCHRPNCHRP

WWW4.nas.edu/trb/crp.nsfWWW4.nas.edu/trb/crp.nsf

TRBTRB

trb.orgtrb.org