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- Elastic stability of a pony truss
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Elastic stability of a pony truss Hrennikoff, Alexander
Abstract
The author of this paper endeavor to find an expression for the value of the load, which causes collapse of certain type of bridge without the top lateral bracing. A qualitative study of the question reveals, that the resist lag action of the web members is greatly affected by the magnitudes of their axel stresses; and this conclusion leads to the necessity of determination of web resistances in terms of loading the energy method consisting in comparison of the elastic energy of structure with the work done by the loading during buckling, is used as the method of attack of the main problem. After evaluation of various terms in the energy equation, expressions for the critical values of different types of loadings are found. An observation of the fact, that the shape of buckling curve is affected by the loading only very slightly leads to the idea of reciprocal influence line of critical loading, allowing an easy treatment of the questions involving movable load. The application of the formulas developed is demonstrated on an example, and the paper is concluded with some final remarks, on the method and its assumptions.
Item Metadata
Title |
Elastic stability of a pony truss
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1933
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Description |
The author of this paper endeavor to find an
expression for the value of the load, which causes collapse
of certain type of bridge without the top lateral bracing. A qualitative study of the question reveals, that the resist lag action of the web members is greatly
affected by the magnitudes of their axel stresses; and
this conclusion leads to the necessity of determination
of web resistances in terms of loading the energy
method consisting in comparison of the elastic energy
of structure with the work done by the loading during
buckling, is used as the method of attack of the main
problem. After evaluation of various terms in the energy
equation, expressions for the critical values of different
types of loadings are found. An observation of the fact,
that the shape of buckling curve is affected by the
loading only very slightly leads to the idea of reciprocal
influence line of critical loading, allowing an easy treatment
of the questions involving movable load. The application of the formulas developed is demonstrated on an
example, and the paper is concluded with some final remarks,
on the method and its assumptions.
|
Genre | |
Type | |
Language |
eng
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Date Available |
2012-03-16
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0050911
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.