Fatigue Strength of Welded Beams with Stiffeners PDF Download

Author: Pedro Albrecht
Publisher:
ISBN:
Category : Welded joints
Languages : en
Pages : 416

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Author: John W. Fisher
Publisher: Transportation Research Board National Research
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 650

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This research (which is the second phase of a study intended to provide reliable information on fatigue behavior of steel bridge members), and an extensive investigation of fatigue effects in welded steel beams, which formed the basis for recommendations for revision of the fatigue provisions of the AASHP Standard Specifications for Highway Bridges. A hundred and fifty seven steel beams and girders were fabricated and tested to define the fatigue strength of various structural details, including stiffeners and attachments. Stress range was observed for nearly all the variation in cycle life for all stiffener and a attachment details examined in this study.

Author:
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 4

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Author: T. R. Garney
Publisher:
ISBN:
Category :
Languages : en
Pages : 14

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Author: Timothy Russell Gurney
Publisher: CUP Archive
ISBN: 9780521225588
Category : Technology & Engineering
Languages : en
Pages : 480

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Author: John W. Fisher
Publisher:
ISBN:
Category :
Languages : en
Pages : 36

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The paper summarizes some of the findings of a comprehensive study on the fatigue strength of rolled and welded built-up beams without attachments, rolled and welded beams with cover plates, and welded beams with flange splices. Altogether, 374 steel beams with two or more details were fabricated and tested. The welded beam details discussed herein represent the upper and lower boundaries of fatigue behavior of welded beams. The lower bound is provided by beams with partial length cover plates - a severe notch producing details. For purposes of design, this study has shown that the fatigue strength of the upper and lower bound details is independent of the strength of steel. A36, A441 and A514 steel beams provided the same fatigue strength for a given detail, and stress range was observed to account for nearly all the variation in cycle life. The paper reviews briefly the major variables that influence the fatigue strength of welded details and suggests how they should be considered in design. (Author).

Author: Norman Edward Frost
Publisher: Courier Corporation
ISBN: 9780486409276
Category : Technology & Engineering
Languages : en
Pages : 550

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Definitive, clearly written, and well-illustrated volume addresses all aspects of the subject, from the historical development of understanding metal fatigue to vital concepts of the cyclic stress that causes a crack to grow. Examines effect of stress concentrations on notches, theories of fatigue crack propagation, and many other topics. Seven appendixes describe laboratory fatigue testing, stress concentrations, material stress-strain relationships, and more. Invaluable text for students of engineering design and metallurgy.

Author: William Herman Munse
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 88

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Author: David T. DeLong
Publisher: Purdue University Press
ISBN: 9781622600748
Category : Transportation
Languages : en
Pages : 224

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The brittle fracture of the Hoan Bridge in December 2000 highlighted the fracture susceptibility of details containing intersecting welds in steel bridges. Though it is now known that details with intersecting welds should be avoided, many existing bridges in Indiana contain details with intersecting welds. Little experimental data on the fatigue performance of these details exists. The purpose of this study was to evaluate the fatigue strength of several details commonly found in steel bridges in Indiana that contain intersecting welds. Large-scale experimental fatigue testing were performed using nine steel beams to study the behavior of three basic types of welded details: a vertical stiffener, a horizontal stiffener terminating near a vertical stiffener, and a horizontal gusset plate coped to fit around a vertical stiffener. The welded details in this study were fabricated with varying degrees of web gap, defined as the distance between perpendicular weld toes. The results of the experimental testing were examined and compared to prior testing to determine if the size of the web gap affected the fatigue strength. Furthermore, the performance of drilled hole retrofits used to extend the fatigue life of these details was studied. Within the scope of the fatigue testing program, the presence of intersecting welds was not found to significantly affect the fatigue strength of vertical stiffener and horizontal gusset details. However, the size of the web gap may have had an effect on the fatigue strength of details where a horizontal stiffener terminated near a vertical stiffener. Further experimental testing is needed to more clearly define the relationship between web gap and fatigue strength for this case. Drilled hole retrofits were successful at prolonging the lives of these details to varying degrees, but it should be noted that the stress redistribution resulting from these holes may cause fatigue cracking at nearby weld toes.

Author: David W. Hoeppner
Publisher: ASTM International
ISBN:
Category : Soudures
Languages : en
Pages : 301

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