Abstract
The purpose of this paper is to establish a method for evaluating the full plastic strength of mono-pole steel towers instead of the normal yield strength. The bending tests on small models of partial towers are performed to prove the effectiveness of the nonlinear analysis by comparing with the previously obtained empirical results. The relation between the buckling strength and radius thickness ratio (D/t) are quantitatively evaluated together with the P-Δ effects. Also, this evaluation is ensured through the loading tests on a half-scale tower; the critical limit of D/t for maintaining the full plastic strength is found : D/t ≦ 33500/σ_y, and the allowable deformation of its top is 3% of the height.
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