Numerical study of the effect of liquid sloshing inside TLD on suppression of gust wind-induced vibration in high rise buildings

Abstract

Paper presented to the 10th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Florida, 14-16 July 2014.

Needless to say that the use of TLD in damping of the light scale vibration in due to wind excitation as well as the large scale excitation on offshore platforms exhibits an effective dynamic absorber. One of the prime importance of using TLD as an effective absorber coupled with structure is to impart the effect of fatigue stresses accompanied with the repeated excitation loads. The serviceability of the high rise buildings and the steel towers is another important application of using TLD to suppress the building acceleration and realize the comfort and healthy conditions. The full scale measurements of the structure dynamic response exhibits an effective method for the validation of the structure design procedure and emphasize the accuracy of the numerical models suggested predicting the structure dynamic response. The current model behaves as a NSE model accurately predict the sloshing fluid motion inside TLD and handles the moving free surface by using the (VOF) method. The current model use the continuum surface force model CSF to model the discontinuity accompanied with wave breaking inside TLD. The numerical model used in this paper predicts the interaction between the structure dynamic response and highlights the damping effect of TLD groups allocated at different floors of tall buildings. The current model suggests a new criterion to detect the wave breaking and focus attention on the effect of wave breaking on the impact force in due to the sloshing fluid motion inside TLD for a wide range of excitation frequencies. The numerical model used in this paper handles the interaction between the structure dynamic response and the damping effect of TLD groups allocated at different floors of the tall building. The model was validated by a direct comparison with the full scale measurements of one of the high rise buildings. The direct comparison shows a good agreement proves that the current numerical model is a powerful tool used assess the damping effect of TLD on structure dynamic response.