Influence of boundary conditions on the shear post-buckling behavior of thin web plates

Peter Wang, Kevin Augustyn, Alex Gomez, Spencer Quiel, Maria Eugenia Moreyra Garlock

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

Thin steel webs in plate girders possess strength beyond the elastic buckling load which is commonly referred to as the post-buckling capacity. Semi-empirical equations based on experimental tests of plate girders have been used for decades to predict this post-buckling capacity up to the ultimate shear load. However, these predictions are predicated on a specific set of assumptions regarding the boundary conditions of the plate. Specifically, the rotational and translational restraint provided by the stiffeners and flanges are idealized when calculating the post-buckling capacity of the web. To this end, the current design equations provide an approximate (albeit generally conservative) estimate of capacity relative to the test data upon which they are founded. New research by the authors has examined the impact of web boundary conditions on the post-buckling shear capacity. Analyses of isolated web plates, independent of the flanges and stiffeners with idealized boundary conditions, are compared against the response of webs within a plate girder loaded predominantly in shear. Experimentally validated finite element models are the basis for this study. Outputs such as von Mises stresses and principal stresses are examined for the buckled plate, whose behavior is influenced by both membrane stresses and second-order bending effects. These evaluations are performed for a range of panel aspect ratios, axial (longitudinal) restraint, and initial imperfections, with the goal of exploring changes in post-buckling shear capacity as well as changes in the fundamental mechanics. The results of this study have potential implications for current design-basis approaches.

Original languageEnglish (US)
Title of host publicationStructural Stability Research Council Annual Stability Conference 2019, SSRC 2019
PublisherStructural Stability Research Council (SSRC)
Pages503-521
Number of pages19
ISBN (Electronic)9781510884465
StatePublished - Jan 1 2019
EventStructural Stability Research Council Annual Stability Conference 2019, SSRC 2019 - St. Louis, United States
Duration: Apr 2 2019Apr 5 2019

Publication series

NameStructural Stability Research Council Annual Stability Conference 2019, SSRC 2019
Volume2

Conference

ConferenceStructural Stability Research Council Annual Stability Conference 2019, SSRC 2019
CountryUnited States
CitySt. Louis
Period4/2/194/5/19

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction

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  • Cite this

    Wang, P., Augustyn, K., Gomez, A., Quiel, S., & Garlock, M. E. M. (2019). Influence of boundary conditions on the shear post-buckling behavior of thin web plates. In Structural Stability Research Council Annual Stability Conference 2019, SSRC 2019 (pp. 503-521). (Structural Stability Research Council Annual Stability Conference 2019, SSRC 2019; Vol. 2). Structural Stability Research Council (SSRC).