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Victor Gioncu

Bio: Victor Gioncu is an academic researcher. The author has contributed to research in topics: Space (mathematics) & Instability. The author has an hindex of 4, co-authored 4 publications receiving 148 citations.

Papers
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Journal ArticleDOI
TL;DR: In spite of the spectacular development of reticulated shells, at least one problem has not yet been solved satisfactorily and that is the problem of buckling as mentioned in this paper, the instability of isolated members is st...
Abstract: In spite of spectacular development of reticulated shells, at least one problem has not yet been solved satisfactorily and that is the problem of buckling. The instability of isolated members is st...

112 citations

Journal ArticleDOI
TL;DR: In this paper, the authors draw the attention of the designers (often fascinated by the beauty of static analysis) to the essential factors influencing the behaviour of single-layer reticulescu.
Abstract: The aim of the present paper is to draw the attention of the designers (often fascinated by the beauty of static analysis) to the essential factors influencing the behaviour of single-layer reticul...

30 citations

Journal ArticleDOI
TL;DR: The behavior of reticulated space structures is characterised by some peculiarities which make the influence of geometrical imperfections (and consequently that of geometric tolerances ) more complex and more important than in the case of other categories of structures as mentioned in this paper.
Abstract: The behaviour of reticulated space structures is characterised by some peculiarities which make the influence of geometrical imperfections (and consequently that of geometrical tolerances ) more complex and more important than in the case of other categories of structures. In addition to their adverse effect on the bearing capacity of compression members, initial bows (in conjunction with mechanical imperfections, mainly residual stresses ) give rise to an apparent reduction of their axial stiffness. As for deviations of the member lengths form the nominal values, their effect depends on the type of joint connecting system (' adjustable' or ' non-adjustable' ) and on the category of space structure under consideration (single or double-layer ).

11 citations

Journal ArticleDOI
TL;DR: In this paper, the authors present the principal aspects of stability analysis of space structures and describe the evolution of the principles of analysis, the author's method of stable and unstable components is also discussed.
Abstract: The paper presents the principal aspects of stability analysis of space structures. In describing the evolution of the principles of analysis, the author's method of stable and unstable components is also discussed. It is shown that spatiality has contradictory effects: on the one hand, it leads to an increase in the critical bifurcation load and on the other hand it increases the sensitivity to geometrical imperfections by increasing the unstable components. The principal aspects of the stability analysis of structures whose spatiality is due to their shape (shells, double-layer grids or single-layer latticed shells) are described and a number of previous unsatisfactory solutions are discussed. In structures whose spatiality is due to interaction, the stability check is at present not quite correct, but because of bending moments it does not differ very much from a more accurate analysis.

11 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, a model is proposed for the ORTZ joint, which is established from the dimensions and properties of the different elements of which the joint is composed and considers the possibility of the material reaching its yield point.

132 citations

Journal ArticleDOI
TL;DR: In spite of the spectacular development of reticulated shells, at least one problem has not yet been solved satisfactorily and that is the problem of buckling as mentioned in this paper, the instability of isolated members is st...
Abstract: In spite of spectacular development of reticulated shells, at least one problem has not yet been solved satisfactorily and that is the problem of buckling. The instability of isolated members is st...

112 citations

Journal ArticleDOI
TL;DR: In this article, the authors present results obtained from analysis of the nonlinear behavior of single-layer lattice domes with different geometric parameters and joint rigidity for two load cases and conclude with the proposal of a new formula which allows designers a rapid estimation of buckling loads for semi-rigid jointed single layer latticed domes under symmetric loading conditions.

95 citations

Journal ArticleDOI
TL;DR: In this paper, the elasto-plastic stability of seven types of commonly used single-layer reticulated shells was investigated systematically with ANSYS, in which more than 2000 cases of geometrically and material nonlinear analysis were conducted with different initial geometrical imperfections, geometorical, structural and load parameters.
Abstract: Investigation of elasto-plastic stability of reticulated shells has gradually become more and more attractive to researchers. However, the analysis of the elasto-plastic stability is much more complicated than the elastic analysis, because of the involvement of both the geometrical nonlinearity and the material nonlinearity and the interactions of the two. Taking into consideration of material nonlinearity, the elasto-plastic stability behaviour of reticulated shells will be significantly different, which can only be revealed by large amount of geometrically and material nonlinear analysis of the structures. The elasto-plastic stability of seven types of commonly used single-layer reticulated shells (Kiewitt-8, Kiewitt-6, Geodesic, Schwedler Bidirectional, Schwedler Monoclonal, Sunflower, and Radial Rib) was investigated systematically with ANSYS, in which more than 2000 cases of geometrically and material nonlinear analysis were conducted with different initial geometrical imperfections, geometrical, structural and load parameters. Based on the analytical results and via comparison between elastic and elasto-plastic buckling loads, the plasticity influence coefficients were summarized for each type of the reticulated domes. These coefficients can be used to predict accurately the elasto-plastic buckling load in design practice of the reticulated domes, which is an easy way for designers to evaluate stability of the reticulated shells.

86 citations

Journal ArticleDOI
TL;DR: In this article, the authors explain some parameters influencing the failure load of domes and barrel vaults and make suggestions for the imperfection shape which has to be assumed in an analysis.

85 citations