Abstract
In recent years, not only the seismic but also wind-resistant design of the high-rise building is considered, for safety along with the comfortability to the residents. The passive control system is widely used in the high-rise building to dissipate energy from vibration. Among all kinds of passive control systems, the viscoelastic (VE) damper, which is accompanied by the frequency-sensitivity, needs to consider the efficiency of the energy dissipation subjected to the external force (Kasai et al.,2002), including the seismic of massive amplitude with high-frequency and wind excitation of the minor amplitude with low-frequency.
In the paper, the fractional derivative (FD) material (Kasai et al.,1993) is adopted as the exact solution of the VE material, which needs to consider the temperature factor along with the frequency-sensitivity factor, is much more complicated than that of a simplified VE damper system when doing the simulation in dynamic analysis. On the other hand, the simplified VE damper system, such as the Kelvin system and the Maxwell system, is commonly used in seismic control with high reliability, but no evidence approved whose in the wind control. Comparing with features of the earthquake, the strong wind excitation which directly applies to the upper structure of the building, has a wide-band frequency content. It leads to a significant difference in the structural response between the simplified VE damper systems and the FD system.
To improve the reliability of the simplified VE damper system subjected to strong wind excitation, this research evaluated the wind-induced response along with the energy dissipation of the simplified VE damper systems considering the influence of frequency-sensitivity.
