Engineering Transactions, 36, 2, pp. 207-215, 1988

Interaction Hypersurfaces Applied to Estimate the Load-Carrying Capacity of Space Trusses

J.A. König
Institute of Fundamental Technological Research, Warszawa

J.A. Karczewski
Institute of Fundamental Technological Research, Warszawa

J. Czarnecki
Technological University of Warsaw, Warszawa

When determining the load-carrying capacity of a space truss, one has assumed, usually that the result depends exclusively on properties of elements (struts) i. e. that the strengh of joints is sufficiently high. Since joints constitute up to 30 per cent of the total truss weight such an approach seems non-economical. The paper presents another approach to the joints design based on analysis of their strength by means of interaction hypersurfaces of forces acting upon them. First, the general concept is outlined and, then, possible simplifications are shown in the case of joint and load symmetries. The theoretical considerations are illustrated by a numerical example of a truss plate. Some general conclusions considering further development of the proposed approach are given.

Full Text: PDF
Copyright © Polish Academy of Sciences & Institute of Fundamental Technological Research (IPPT PAN).


M. ŻYCZKOWSKI, Combined loadings in the theory of plasticity, PWN, Warszawa 1978.

J. KARCZEWSKI, Elastic-plastic analysis of variably loaded space bar structures, Wyd. Pol. Warsz., Prace Nauk., Budowo., 46, Warszawa 1976 [in Polish].

M. LUBIŃSKI, J. A. KARCZEWSKI, J. CZERNECKI, Load-carrying capacity of nodes made of fiat sheets. Arch. Inż. Ląd., 30, 461-470, 1984.

J. A. KARCZEWSKI, J. CZERNECKI, J. A. KÖNIG, The load-carrying capacity of space truss nodes composed of flat steel plates, in: Third Int. Conf. on Space Struct., ed. H. NOOSHIN, Elselvier Appl. Sci. Publ., London-New York, 533-538, 1984.

J. BRÓDKA et al., Structural roofings, Arkady, Warszawa 1985 [in Polish].