Naslov
Large displacements in numerical analyses of cable bridge structures

Autori
Mihanović, Ante ; Živaljić, Nikolina ; Trogrlić, Boris

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
Proceedings of the International Conference on Bridges organized by Structural Engineering Conferences (SECON) and Croatian Society of Structural Engineers (CSSE) / Radić, Jure - Dubrovnik : Structural Engineering Conferences (SECON) and Croatian Society of Structural Engineers (CSSE), 2006, 391-398

ISBN
953-95428-0-4

Skup
International Conference on Bridges

Mjesto i datum
Dubrovnik, Hrvatska, 21.05.2006. - 24.05.2006

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
cable structures; large displacements; formfinding

Sažetak
Method for defining appropriate form and for calculating stress and displacements of tensile cable structures is presented. The developed numerical model is taking into account the material and geometric nonlinearity. The described model represents a practical way of implementing the large displacements theory in the analysis of formfinding for cable structures. The behaviour of the structure under an increasing load, from zero up to final is described. The load applied in two phases. The first phase is prestressing. In the second phase, the structure is computed taking into account the dead and the live gravity load. An approach to solving the problem of large displacements in the theory of structures is presented, based on an incremental approach of the Total Lagrange formulation with the small displacements. The model is based on the assumption that the FE are linear and small enough and thus tracking of large translational displacements can be approximated by a simple geometrical model. The resulting stress inside FE are expressed within the large displacements, based on the successive approach of small displacements of each increment, using a singular quasi-tangent stiffness matrix. A solution of renewable of the internal forces and their influence is presented. The renewal of the large translational displacements is based on their vector from increment to increment. The renewal of the geometry configuration is influenced to the renewal of basic, geometrical and large displacement stiffness. Spatial discretization of the system is on two-node line elements. The fiber discretization of the cross-section is on triangular elements where mechanical properties of each fiber are presented by the sigma-epsilon diagram. The numerical nonlinear material model is based upon nonlinear material properties defined in the form of a uniaxial sigma-epsilon diagram. The presented model is applied for analysing of few examples witch present good comparison with existing experiments.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

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