Abstract
As a kind of energy dissipating device in simple configuration, friction dampers have been used in several buildings, either as earthquake-resistant devices for new-built buildings or as reinforcing devices for existing buildings. Semi-active dampers have been designed to improve the vibration abating performance of passive dampers by modifying the contact force of friction dampers. This paper studies the application of passive and semi-active friction dampers to seismic vibration control of Hefei TV tower. To meet the particularity of dynamical analysis of friction-damped high-rise truss tower, this paper constructs two mechanic models: one is three-dimensional finite element static model and the other is two-dimensional lumped-mass dynamic model for Hefei TV tower's vibration control study. The two mechanic models are comprehensively used in establishing the control force transforming matrix and computing the relative displacement of the two ends of an arbitrarily located friction damper. A semi-active control strategy, which is based upon second-optimal control theory is put forward as the control algorithm of semi-active dampers. The studies of this paper confirm the feasibility of the innovated method in the dynamical response analysis for friction-damped high-rise truss tower and the semi-active control algorithm, as well as the effectiveness of passive and semi-active friction damper in abating the seismic vibration responses.
| Original language | English |
|---|---|
| Pages (from-to) | 101-106 |
| Number of pages | 6 |
| Journal | Journal of Earthquake Engineering and Engineering Vibration |
| Volume | 20 |
| Issue number | 2 |
| Publication status | Published - 5 Oct 2000 |
| Externally published | Yes |
Keywords
- Friction damper
- High-rise truss tower
- Quasi-optimal control algorithm
- Seismic response
- Semi-active control
ASJC Scopus subject areas
- Geotechnical Engineering and Engineering Geology
- Geophysics