An energy balance-based design method for earthquake-induced response of building has been proposed by Dr. Akiyama. This method is very useful for evaluation of the cumulative damage. However, an energy balance-based design method for the wind-induced response of buildings has not been established yet. In this study, we develop a prediction method based on energy balance for the wind-induced cumulative damage to hysteretic dampers installed in a high-rise building. A new optimum yield shear force coefficient distribution and damage concentration factor for the prediction of damage caused by wind-induced response are proposed in this paper. The validity of this method is confirmed by comparing the results with time history analysis results by using a multi-degree-of-freedom model having hysteretic dampers.
In Chapter 2, many time history analyses carried out to evaluate the optimum yield shear force coefficient distribution on wind-induced response. It is verified that the optimum yield shear force coefficient distribution on wind-induced response can be estimated from the maximum response shear force coefficient distribution in the elastic model. In addition, the optimum yield shear force coefficient distribution on wind-induced response shows a feature different from distribution on the earthquake-induced response.
In Chapter 3, we present a new method to calculate the optimum yield shear force coefficient distribution on wind-induced response by using spectrum modal analysis instead of time history analysis. The proposed spectrum modal analysis considers not only the effect of resonant response in the first mode but also the background wind-induced response. The predicted cumulative damage distribution by this optimum yield shear force coefficient distribution agrees well with the theoretical cumulative damage distribution.
In Chapter 4, we propose a new damage concentration factor on wind-induced response. This damage concentration factor is determined from many time history analysis results, and it is larger than the damage concentration factor on earthquake-induced response. The cumulative damage of the damper in the wind-induced response is predicted by using the proposed optimum yield shear force coefficient distribution and damage concentration factor. The validity of this prediction method is confirmed by comparing with many time history analysis results using the multi-degree-of-freedom model with hysteretic dampers. The predicted cumulative damage distribution of dampers on wind-induced response agrees well with the time history analysis results.
