Evaluation of amplitude-dependent damping and natural frequency of buildings during strong winds

This paper proposes an RDT ranked by peak amplitude for directly and effectively evaluating the amplitude dependences of dynamic phenomena. It first theoretically explains the principle of RDT based on a conditional expectation. Then, it shows that a modified conditional expectation enables the RDT to estimate amplitude dependences, and derives the RDT ranked by the peak amplitude. Analytical and numerical examples are examined for a simple SDOF model. The proposed technique is then applied to wind-induced response data of three towers and the results are compared with those of the traditional technique.