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A new framework for evaluating
along-wind responses of
a transmission tower
Liu Guohuan and Li Hongnan
School of Civil and Hydraulic Engineering, Dalian University of
Technology, Dalian 116023, China
Abstract: In this paper, an analytical framework to evaluate the
along-wind-induced dynamic responses of a transmission tower is
presented. Two analytical models and a new method are developed: (1) a
higher mode generalized force spectrum (GFS) model of the transmission
tower is deduced; (2) an analytical model that includes the
contributions of the higher modes is further derived as a rational
algebraic formula to estimate the structural displacement response; and
(3) a new approach, applying load with displacement (ALD) instead of
force, to solve the internal force of transmission tower is given.
Unlike conventional methods, the ALD method can avoid calculating
equivalent static wind loads (ESWLs). Finally, a transmission tower
structure is used as a numerical example to verify the feasibility and
accuracy of the ALD method.
Keywords: along-wind-induced dynamic responses; transmission
tower; generalized force spectrum; equivalent static wind loads
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