Thesis (Ph. D.)--Virginia Polytechnic Institute and State University, 1990. / Vita. Abstract. Includes bibliographical references (leaves 125-130). Also available via the Internet.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1991. / Vita. Abstract. Includes bibliographical references (leaves 153-155). Also available via the Internet.

Thesis (M.S.)--Virginia Polytechnic Institute and State University, 1991. / Vita. Abstract. Includes bibliographical references (leaves 113-116). Also available via the Internet.

Thesis (M.S.)--University of Wisconsin--Madison, 1960. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 105-106).

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

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Project report (M. Eng.)--Virginia Polytechnic Institute and State University, 1983. / Vita. Abstract. Includes bibliographical references (leaves 75-81). Also available via the Internet.

This thesis deals with the behaviour and design of triangular trusses fabricated from Hollow Structural Sections (HSS), with two Warren-type web planes and a single tension chord. Experimental programs are described in which triangular truss segments and simplified joints were tested in order to investigate the behaviour of compression web members and tension-chord welded joints. The mechanics of joint deformations are analysed in relation to the yield line theory, and simple models are shown to give a good prediction of the joint stiffnesses and strengths. Complex yield line models are investigated, but are slightly or not superior to the simple models. Recommendations are established covering the design of tension and compression chord joints, as well as chord and web members. The design of a 22 m span triangular truss is outlined.

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