Research Article
Jan 1936
Effect of Secondary Stresses Upon Ultimate Strength
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VIEW THE REPLYPublication: Transactions of the American Society of Civil Engineers
Volume 101, Issue 1
Abstract
An analysis of the action of members of a bridge truss subjected to axial stress and secondary bending that arises from the deflection of the truss in its own plane, is given in this paper. The study is devoted primarily to the question of the effect of secondary stress in reducing the ultimate strength of such members, and, therefore, particular attention is given to the redistribution that occurs when the outer fiber stresses approach the yield point. As a supplementary study, a series of laboratory tests was made to determine the actual behavior of compression members with thin walls subjected to high secondary stresses and loaded to failure.
From the general analysis, and from these tests, it is concluded that for types of members and loading conditions investigated (which are believed to simulate closely the essential conditions for most bridge members), the ultimate strength is practically unaffected, even by high secondary stresses, if, in the case of compression members, the relative wall thickness is maintained at the ratio ordinarily required by the leading standard specifications.
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Published In
Transactions of the American Society of Civil Engineers
Volume 101 • Issue 1 • January 1936
Pages: 289 - 326
Copyright
© 1936 American Society of Civil Engineers.
History
Published in print: Jan 1936
Published online: Feb 10, 2021
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Authors
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John I. Parcel, M.ASCE
Cons. Engr. ( Sverdrup & Parcel), St. Louis, Mo.
Eldred B. Murer, J.ASCE
Wayland, Mo.
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