Steel plate girders with long or unstiffened web panels are often tapered to produce optimized members in buildings and bridges. Web shear strength is a critical limit state for these members because they usually have slender webs. Historically, shear has been apportioned to the web using two methods. The most common method is to assign the entire shear to the web. Alternatively, the Modified Shear Method considers the vertical component of each flange force resulting in web shear force not equal to the total shear. The first objective of this research was to experimentally determine the accuracy of these methods. It was found that the Modified Shear Method accurately predicted the shear resisted by the web at all 18 instrumented cross-sections in ten tested specimens. Several methods for predicting shear strength of unstiffened and long prismatic web panels are available in the literature. The second major objective of this research was to determine if one or more of these methods accurately predicts tapered member shear strength. Measured ultimate shear strengths were compared to predictions. Methods based on Basler's method provided inaccurate predictions. Methods based on Höglund's method and the method by Lee and colleagues provided accurate predictions.
|Number of pages||8|
|Journal||Journal of Constructional Steel Research|
|State||Published - May 30 2015|
Bibliographical noteFunding Information:
The writers gratefully acknowledge the Metal Building Manufacturers Association (MBMA) and the American Iron and Steel Institute for funding this research. We are also thankful for the helpful suggestions provided by the MBMA steering committee members. We are also thankful for the assistance from Mr. Jeff Walsh, P.E., of American Buildings Company, Eufaula, Alabama.
© 2015 Elsevier Ltd. All rights reserved.
- Plate girders
- Shear strength
- Shear tests
- Steel beams
ASJC Scopus subject areas
- Civil and Structural Engineering
- Building and Construction
- Mechanics of Materials
- Metals and Alloys