Two large-scale fatigue test studies of plate girders are reported on. One study involved a series of coverplated bridge girders with small fatigue cracks that were retrofitted in 1976 as described in NCHRP Report 206. The second study involved plate girders fabricated from HPS-485W (HPS-70W) steel with welded attachments. The Category E’ coverplated beams that were removed from the I-95 Yellow Mill Pond Bridge in 1997 had been retrofitted in 1976 by either air hammer peening or gas tungsten arc (GTA) remelting. All details had small fatigue cracks at the time of retrofit. No further fatigue cracking was observed at the coverplate ends after 20 years of service and an estimated 56 million truck passages. The beams were tested at a stress range of 69 MPa (10 ksi). Cracks developed from the root of the transverse end weld and propagated through the weld throat. The fatigue resistance of the treated weld toe details improved to Category C except for one GTA-remelted detail, which exceeded Category D. Another study was carried out on large-scale HPS-485W plate girders with as-welded and ultrasonic-impact treatment (UIT) details. UIT was applied to the weld toe of transverse stiffeners welded to the web and flanges (Category C) and to coverplated ends (Category E’). The as-welded details cracked at their expected fatigue resistance. The UIT transverse stiffeners improved to Category B fatigue resistance, whereas the UIT coverplated details improved to Category C fatigue resistance.


    Access

    Download

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Tests of Large Girders Treated To Enhance Fatigue Strength


    Additional title:

    Transportation Research Record: Journal of the Transportation Research Board


    Contributors:


    Publication date :

    2000-01-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Tests of Large Girders Treated To Enhance Fatigue Strength

    Takamori, Hiroyuki | Online Contents | 2000


    Tests of Large Girders Treated To Enhance Fatigue Strength

    Takamori, Hiroyuki | Online Contents | 2000


    Tests on ultimate strength of hull box girders made of high tensile steel

    Gordo, J. M. / Soares, C. G. | British Library Online Contents | 2009


    Fatigue behaviour of steel plated railway bridge girders

    Gunther, H.-P. / Kuhlmann, U. / Belgian Group of IABSE et al. | British Library Conference Proceedings | 2003


    Preliminary fatigue studies on aluminum alloy aircraft girders

    Goodyear-Zeppelin Corporation, Akron, Ohio | TIBKAT | 1938