Showing papers by "Qiusheng Li published in 1998"
TL;DR: The necessary conditions for the occurrence of 2D coupled galloping oscillations and a description of the set of general differential equations for 2D coupling galloping vibrations are established in this article.
24 citations
TL;DR: In this paper, an approach to determine the natural frequencies and mode shapes in vertical direction for tall buildings with variably distributed stiffness and mass is proposed, and the presented method is also applicable to the free longitudinal vibration analysis without considering damping effect.
20 citations
TL;DR: In this paper, the authors considered tall buildings and high-rise structures as cantilever bars with variable cross-section for the analysis of their free vibrations and derived solutions in terms of Bessel functions.
Abstract: In this paper, tall buildings and high-rise structures are considered as cantilever bars with variable cross-section for the analysis of their free vibrations. The differential equations of free longitudinal vibrations of bars with variable cross-section are reduced to Bessel's equations by selecting suitable expressions, such as power functions and exponential functions, for the distribution of stiffness and mass. An approach is proposed for determining the natural frequencies and mode shapes in the vertical direction for tall buildings and high-rise structures with variably distributed stiffness and variably distributed mass. The derived solutions are expressed in terms of Bessel functions. A numerical example shows that the value of the natural frequency computed by the proposed method is close to full scale measured data. It is shown that the selected expressions are suitable for describing the distributions of stiffness and mass of tall buildings and high-rise structures. It is demonstrated that the proposed method has practical significance for free longitudinal vibration analysis. © 1998 John Wiley & Sons, Ltd.
6 citations
4 citations
TL;DR: In this paper, the amplitude dependent characteristics and randomness of damping are presented and discussed, and a stochastic form of Jeary's damping model is established.
Abstract: This paper describes the results obtained from the field measurements of wind effects on a 78-storey high-rise building. Di Wang Tower. The field data, which include wind speeds, wind directions and acceleration responses, presented in this paper were measured atop this building during the passage of Typhoon Sally in 1996. The damping in this tall building is evaluated by Random Decrement Technique (RDT) based on the full scale measurements of wind-induced responses. The amplitude dependent characteristics and randomness of damping are presented and discussed. The time series method is employed to model the random component of damping, and a stochastic form of Jeary's damping model is established.
3 citations