Nonlinear Analysis of Flexible Giant Ferris Wheel

Abstract:

Combined with a project example of flexible giant Ferris wheel,mechanical performance of rim and cable was analyzed.The rational initial prestressing force was chosen to optimize the structural behaviour.The initial imperfection was considered to perform the stability analysis of rim and overall structure.Nonlinear buckling characteristics was researched.Taking both the geometrical and material nonlinearity into account,the elasto-plastic limit bearing capacity analysis was carried out and its results comprehensively revealed the structural characteristics.The results of analytical study indicate that nonlinear characteristics of flexible giant Ferris wheel is obvious due to the introduction of prestressed cable.Mechanical performance of the structure depends on the initial prestressing force.The wheel consisting of radiate spoke cables and space truss provides strong lateral stiffness as well as torsional stiffness and the stability performance is favorable.The mechanism of plastic development is appropriate and its failure mode belongs to the strength failure.The elasto-plastic limit bearing capacity is so large that the wheel can satisfy the need both for operating condition and for storm condition.

Key words:flexible giant Ferris wheel; initial prestressing force; geometrical nonlinearity; nonlinear buckling; material nonlinearity; elasto-plastic limit bearing capacity analysis