Thin Web Girder Fatigue Behavior as Influenced by Boundary Rigidity

Hall, L.R.

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https://hdl.handle.net/2142/14035 Copy

Description

Title

Thin Web Girder Fatigue Behavior as Influenced by Boundary Rigidity

Author(s)

Hall, L.R.

Contributor(s)

Stallmeyer, J.E.

Issue Date

1964-01

Keyword(s)

• Fatigue -- Testing
• Rigid boundaries
• Plate girders --Testing.

Abstract

The purpose of this investigation was to study the fatigue behavior of thin web girders. The investigation was directed primarily toward the determination of the effects of flange rigidity and vertical stiffener rigidity on the fatigue behavior of individual panels of thin web girders. A considerable amount of attention was also devoted to the initial lateral web deflections in the webs of the girders. A qualitative ana1ysis was made of the fatigue behavior of individual thin web girder panels with initial lateral web deflections. Two types of loading were considered: pure shear and combined shear and bending. The analysis was based on theoretical and experimental data on the post buckling behavior of girder web panels which have been reported in the literature. In the experimental part of the investigation twenty fatigue tests were conducted on scale model thin web all-welded girders. Fifteen of these tests were conducted on girders in which the only geometric variab1e was the size of the flanges. Nine of the fifteen tests were carried out under conditions approximating pure shear and the remaining six tests were conducted under the condition of combined shear and flexure. Five additional tests were completed on girders in which the only variable was the rigidity of the vertica1 stiffeners. The investigation revealed the manner in which thin web girder panels fail in fatigue. The effects of flange rigidity and vertical stiffener rigidity on fatigue life were determined and recommendations were made with regard to minimum desirable flange rigidities. Finally, it was shown that initial lateral web deflections have an effect on the fatigue behavior of thin web girders.

Publisher

University of Illinois Engineering Experiment Station. College of Engineering. University of Illinois at Urbana-Champaign.

Series/Report Name or Number

Civil Engineering Studies SRS-278

Type of Resource

text

Language

en

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http://hdl.handle.net/2142/14035

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