Analysis and Load Testing of Two Steel Through Truss Bridges in Indiana : Final Report PDF
Preview Analysis and Load Testing of Two Steel Through Truss Bridges in Indiana : Final Report
SCHOOL OF ENGINEERING CIVIL INDIANA DEPARTMENT OF TRANSPORTATION JOINT HIGHWAY RESEARCH PROJECT FHWA/IN/JHRP-96/3 Final Report ANAYLSIS AND LOAD TESTING OF TWO STEEL THROUGH TRUSS BRIDGES IN INDIANA Brian J. Malone Mark A. Heffron Julio A. Ramirez Donald W. White tea '9 (V UNIVERSITY FinalReport ANALYSIS AND LOAD TESTING OF TWO STEEL THROUGH TRUSS BRIDGES ININDIANA: BRIDGE STRUCTURENO. 58-14-3244 AND BRIDGE STRUCTURENO. 46-11-1316 Brian J. Malone Mark A. Heflron Julio A. Ramirez Donald W. White Purdue University Joint HighwayResearchProject ProjectNo HPR-2100 : FileNo: 7-4-35 Conducted in Cooperationwith the IndianaDepartment ofTransportation and Federal Highway Administration Thecontents ofthis report reflect the views ofthe authorswho are responsible for the facts and the accuracy ofthe data presented herein. The contents do not necessarily reflect the officialviewsorpoliciesoftheFederal Highway Administration and the IndianaDepartment ofTransportation. This report doesnot constitute a standard, specification orregulation. Purdue University West Lafayette, IN47907 September 11, 1996 Digitized by the Internet Archive in 2011 with funding from LYRASIS members and Sloan Foundation; Indiana Department of Transportation http://www.archive.org/details/analysisloadtestOOmalo ACKNOWLEDGMENTS Thanks are extended to the advisory committee members, Joe Torkos, Brett Safewright, Wesley Billups, Larry O'Donnell, Firooz Zandi, and Jaffar Golkhajeh. Appreciation is expressed to the Federal Highway Administration and the Indiana Department ofTransportationthroughthe Joint Highway Research Project for providing the funding for this study. TECHNICALREPORTSTANDARDTITLEPAGE 1. ReportNo. 2. GovernmentAccessionNo. 3.Recipient'sCatalogNo. FHWA/IN/JHRP-96/3 4.TitleandSubtitle 5. ReportDate September11, 1996 AnalysisandLoadTestingofTwoSteelThroughTrussBridgesinIndiana 6. PerformingOrganizationCode 7.Author(s) 8. PerformingOrganization ReportNo. BrianJ.Malone,MarieA.Heffron,JulioA.Ramirez,DonaldW.White FHWA/IN/JHRP-96/3 9. PerformingOrganizationNameandAddress 10.WorkUnitNo. JointHighwayResearchProject CivilEngineeringBuilding PurdueUniversity 11. ContractorGrantNo. WestLafayette,Indiana 47907-1284 HPR-2100 12. SponsoringAgencyNam*andAddress 13. TypeofReportandPeriodCovered FinalReport IndianaDepartmentofTransportation ExecutiveSummary StateOfficeBuilding November1, 1993-May1, 1996 1000NorthSenateAvenue Indianapolis,IN46204 14. SponsoringAgencyCode 15. SupplementaryNotes 16. Abstract ResultsoftheloadtestsoftwosteelthroughtrussbridgeswereusedtoevaluatetheassumptionsusedbyBARSfortheratingofthistypeofbridge.Basedonthe resultsfromthisstudyitisrecommendedthattheIndianaDepartmentofTransportationusetheloaddistributionfactorsinthe1994LRFDSpecificationsinthe ratingofthesebridges.ThiswillimplyreplacingtheloaddistributionfactorscurrentlyusedinBARS. Theimplementationofthenewdistributionfactorswillresultinalessconservativeratingofthelongitudinalbeamsinthistypeofbridge.Theincreaseinthe allowedmomentsforthegirdersmayleadtothetrussmemberscontrollingtheratingofthebridge.Theexperimentalresultsfromthisstudyshowthatthecurrent methodsandassumptionsadequatelypredictthecapacitiesofthetrussmembers. 17. Keywords 18. DistributionStatement structuralperformance,deflections,truss,bridge,loadtest,rating Norestrictions. ThisdocumentisavailabletothepublicthroughtheNational TechnicalInformationService,Virginia,22161 19. SecurityClassit(ofthisreport) 20. SecurityClassif.(ofthispage) 21.No.of Pages 22. Price Unclassified Unclassified 224 FormDOTF1700.7(8-69) Analysis and Load Testing ofTwo Steel Through Truss Bridges in Indiana Implementation Report Results of the load tests of two steel through truss bridges were used to evaluate the assumptions used byBARS forthe rating ofthis type ofbridge. Based on the results from this study it is recommended that the Indiana Department ofTransportation use the load distribution factors in the 1994 LRFD Specifications in the rating ofthese bridges. This will imply replacing the load distribution factors currently used in BARS. The implementation ofthe new distribution factors will result in a less conservative rating ofthe longitudinal beams in this type ofbridge. The increase in the allowed moments for the girders may lead to the truss members controlling the rating ofthe bridge. The experimental results from this study show that the current methods and assumptions adequately predict the capacities ofthe truss members.
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