A Strategy for Automatic Elimination of Mechanical Instability in Structural Analysis of Spatial Truss Tower Model

• Autorzy: Pelc J.
• Języki publikacji: EN

Abstrakty

EN

A method for structural analysis of lattice transmission towers considered to be spatial trusses is proposed. It consists in automatic elimination of mechanical instability from the structure. The instability result from the existence of the so-called out-of-plane nodes in a structure model. The method is based on blocking the possible displacements of out-of-plane nodes and the information concerning the need for blocking the specific displacement is obtained from analysis of the system stiffness matrix. Through application of the spatial rod finite elements lattice transmission towers may be analysed with the use of spatial truss models. The short characteristic of the in-house computer program applied for identification of truss members not satisfying the load capacity criterion, comparison of the results obtained by use of the method and ones obtained by applying the plane truss model and the frame model with the reduced member flexural stiffnesses are also presented.

Słowa kluczowe

EN

lattice; transmission tower; spatial model; finite element method

PL

kratownica; model przestrzenny; metoda elementów skończonych

• Wydawca: Wydawnictwo Uniwersytetu Warmińsko-Mazurskiego w Olsztynie
• Czasopismo: Technical Sciences / University of Warmia and Mazury in Olsztyn
• Rocznik: 2012
• Tom: nr 15(2)
• Strony: 319--330
• Opis fizyczny: Bibliogr. 5 poz., rys., tab., wykr.

Twórcy

autor

Pelc J.

• Department of Mechanics and Machine Design, University of Warmia and Mazury in Olsztyn,

Bibliografia

• RAKOWSKI G., KACPRZYK Z. 2005. Finite element method in structural mechanics. Oficyna Wydawnicza Politechniki Warszawskiej, Warszawa.
• ALBERMANI F.G.A., KITIPORNCHAI S. 2003. Numerical simulation of structural behaviour of transmission towers. Thin Wall Struct, 41: 167-77.
• KEMPNER Jr L., DO T.T., MUELLER III W. 2002. Lattice transmission tower analysis moves beyond the simple truss model. Electric Light & Power, 80(12): 22, 2p.
• GANI F., LE´ GERON F. 2010. Dynamic response of transmission lines guyed towers under wind loading. Can. J. Civ. Eng., 37: 450-64.
• DA SILVA J.G.S., VELLASCO P.C.G.D.S., DE ANDRADE S.A.L., DE OLIVEIRA M.I.R. 2005. Structural assessment of current steel design models for transmission and telecommunication towers. J. Constr. Steel. Res., 61: 1108-34.