USE OF AMBIENT RESPONSE MEASUREMENTS TO DETERMINE DYNAMIC CHARACTERISTICS OF SLENDER STRUCTURES

This paper deals with the experimental studies for determining the dyn amic characteristics of slender structures by using the measured struc tural responses to ambient excitations e.g. traffic excitation or wind load. The theoretical background for random response of linear struct ures, the experimental method, data acquisition and analysis technique s for identifying the characteristics of the structures are expounded. On-site measurements of a 30 m tall lamp post structure under ambient ground motion and the excitation of wind of Beaufort force 6 were car ried out. Natural frequencies and the correspondent modal shapes are o btained. Copyright (C) 1996 Elsevier Science Ltd.