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Thursday, July 23, 2020 | History

2 edition of Fatigue tests of hybrid plate girders found in the catalog.

Fatigue tests of hybrid plate girders

A. A. Toprac

Fatigue tests of hybrid plate girders

by A. A. Toprac

  • 51 Want to read
  • 37 Currently reading

Published by Center for Highway Research, University of Texas at Austin] in [Austin .
Written in English

    Subjects:
  • Plate girders -- Fatigue.,
  • Plate girders -- Testing.

  • Edition Notes

    Statementby A. A. Toprac [and] M. Natarajan.
    SeriesUniversity of Texas at Austin. Center for Highway Research. Research report 96-5F
    ContributionsNatarajan, M., joint author., Texas. Highway Dept., University of Texas at Austin. Center for Highway Research.
    Classifications
    LC ClassificationsTA684 .T65
    The Physical Object
    Paginationx, 56 l.
    Number of Pages56
    ID Numbers
    Open LibraryOL4859700M
    LC Control Number75636762

    Fatigue tests on three large-size girders were conducted as a part of an investigation on the fatigue strength of welded plate gir-ders. The specimens of ASTM-A steel were subjected to high shear and developed a failure mode which differed from that of beams. Cracks gen-erally occurred in the web along panel boundaries and showed a tendency.   Crane Girder Design Crane Girder Details Proper detailing is the key to good fatigue performance The vast majority of crane girder performance issues occur at the crane girder to column connection. 3 4 Column or Bracket Support • Do not use framed or clip angle type connections. • Extend bearing stiffeners the full height of the girder.

    Proposal for fatigue testing of welded plate girders under the interaction of bending and shear, January FATIGUE TESTS OF,WELDED PLATE SHEAR,.LehighUniversity, Fritz Engineering Laboratory:Report No. ,.November 4. A. FATIGUE STRENGTH OF 'FULL-SIZE HYBRID GIRDERS -,A PROGRESS . A series of fatigue tests on slender plate-girder webs subjected to repeated shear loading is described. Details of the test results presented include the load ranges and number of load cycles to fatigue failure, the location and extent of fatigue cracks, out-of-plane web deflections, and stress ranges at fatigue crack locations.

    Fatigue tests on three SRC girders were carried out in Tongji University. results showed that the fatigue failure mode of the SPCC strengthened beams was the fatigue failure of the steel plate. Hybrid girders, in general, may be designed for fatigue as if they were homogeneous plate girders of the flange steel. Composite and noncomposite I-shaped girders may qualify as hybrid. Noncomposite girders must have both flanges of steel with the same yield strength. Yield strength of web steel should be lower, but not more than 35% less.


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Fatigue tests of hybrid plate girders by A. A. Toprac Download PDF EPUB FB2

This experimental investigation presents results from 63 fatigue tests of hybrid plate girders with A36 steel webs and A44l or A5l4 steel flanges. The objectives of this project were (1) to determine the manner in which thin web hybrid girders fail and (2) to determine what factor influences the fatigue strength.

This paper presents the results of an investigation intended to obtain fatigue data for hybrid plate girders and to determine their fatigue strength at two million cycles.

Fatigue tests were conducted on six welded hybrid plate girders with flanges of A steel and webs of A36 steel. Web slenderness ratios of and were investigated. fatigue strength of hybrid plate girders. the results of 63 hybrid girders tested at the university of texas, austin are presented.

six girders had a steel flanges and the others had a steel flanges. all girders had a36 steel webs. forty-three girders were tested in bending, three in Fatigue tests of hybrid plate girders book, and seventeen in combined bending and by: This paper investigates the effect of the yielded zone in the web, at its junction with the flange, on the static strength and the fatigue resistance of hybrid girders in bending.

Nine fatigue tests on girders of 2 to 5 meter span with main details usually encountered in small and medium span bridges were realised and by: 2. This paper investigates the effect of the yielded zone in the web, at its junction with the flange, on the static strength and the fatigue resistance of hybrid girders in bending.

Nine fatigue. This report describes the fatigue tests of nine large-size, welded plate girders. The purpose of the tests was to examine the fatigue behavior of thin-web girders, particularly the webs, for the formulation of design recommendations.

The girders were subjected to loading conditions of high shear, pure bending, and their combination. This report describes the fatigue tests of two welded plate girders subjected to pure bending. The purpose of the tests was to examine the fatigue behavior of slender webs and to determine whether lateral web deflections have any affect on the fatigue life of plate girders.

Measurements indicated that large lateral web deflections. The treatment of hybrid girders is identical to one of homo-geneous prototypes except for the following remarks.

Firstly, as the resistance to direct stresses of plate girders is calculated by using the effective area of the cross-section, in the particular case of hybrid design, f yf must be used in determining the effective area of the web.

A hybrid steel girder is a welded girder with different steel grades in flanges and web. Usually, the flanges are made of high strength steel (HSS) like. All the basic & important step are given in this PDF.

You can easily design any plate girder on the basis of these steps with a simple process of design by following our given steps in the PDF file provided below.

plate girder reduction factor RPG accounts for the strength reduction due to elastic web buckling. The hybrid girder factor Re is equal to for homogeneous girders.

Application of Re will be discussed subsequently. After all the necessary values have been determined, the flexural design strength can be compared to the maximum.

The Eurocode for plated structures mentions hybrid girders and gives a limitation that the ratio between the yield strengths of flanges and web should not exceed two.

No details are given about the design. A wide use of hybrid girders would require inclusion in codes or handbooks and this paper is intended to give the information needed.

Three hybrid plate girders were tested in combined bending and shear. Both fatigue and static ultimate tests were performed.

The flanges were of A5l4 steel and the webs were of A36 steel. The stress range in the flanges was 25 ksi with the flange stress fluctua­ ting from 25 ksi to 50 ksi.

The only variable was the transverse stiffener length. Fatigue tests of four hybrid plate girders comprised of ASTM A steel flanges and ASTM A36 steel web under constant moment condition are reported.

For all the girders the web was 36 in. deep_ Two girders had a s lendernes s ratio of whtle the same for the other two was All four girders were subjected to a stress range.

Also, the cracks initiation location and fatigue life are predicted based on the fatigue damage theory, which shows good agreements with tested results, also the C degree of American standard AASHTO is suggested to be used in the fatigue design of corrugated steel web in composite girders.

Two series of fatigue tests on welded hybrid plate girders are described. The first series consisted of 14 panel specimens and the second series consisted of 14 full-length specimens.

In both series, the center test panel (or panels) was subjected to pure bending moment. The test specimens had ASTM A A discussion of fracture toughness of structural steel and weld metal is presented along with typical Charpy and fracture-toughness test data, including the new high-performance steel A HPS W.

Fatigue of cover plate details and distortion-induced cracking are discussed. Numerous tests have indicated the formation of several types of fatigue crack in the webs of slender plate girders subjected to combinations of bending and shear as illustrated in Fig.

types 2 and 3 are associated primarily with the tensile membrane bending stresses below the neutral axis of the girder. Six fatigue tests were conducted on welded hybrid plate girders. The flange steel was A44l and the web steel was A Web slenderness ratios of and were investigated.

A sequential test program was devised to determine the maxi­ mum permissible stres s range that will give a life of two million cycles. The researchers evaluated fatigue test results of CWGs mainly by the S-N approach (stress-fatigue life).

Ibrahim et al., revealed that the fatigue category of the web-to-flange welded detail is higher than stiffened girders with flat webs but lower than unstiffened girders with flat webs. The category fits between Categories B and C in AASHTO Specifications, or between fatigue.

Fatigue tests on two full-size welded plate girders were conducted at Lehigh University in The purpose of this paper is to report the results obtained from these tests~ Prior to the tests, an extensive theoretical and experi-mental investigation of the static behavior of welded plate girders was carried out.

(2,3,4,5) A suggested.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 as described in NCHRP Report The second study involved plate girders fabricated from HPSW (HPSW) steel with welded attachments.The test girders failed by fatigue cracks, which started at the weld between the web and the tension flange near the web fold line.

A relationship between the .