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. / Applied Science, Faculty of / Civil Engineering, Department of / Graduate
| Identifer | oai:union.ndltd.org:UBC/oai:circle.library.ubc.ca:2429/41506 |
| Date | January 1933 |
| Creators | Hrennikoff, Alexander |
| Publisher | University of British Columbia |
| Source Sets | University of British Columbia |
| Language | English |
| Detected Language | English |
| Type | Text, Thesis/Dissertation |
| 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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