Title: Building hazard mitigation with piezoelectric friction dampers
Abstract: Semi-active piezoelectric friction dampers have been recently introduced to reduce the peak responses of buildings. They are regulated in real time with applied voltages according to a simple and effective control algorithm that combines the viscous and nonlinear Reid damping mechanisms. This chapter addresses some performance-related issues such as the stick and sliding features of a friction damper, optimum ratio of Reid and viscous damping in the control algorithm, performance comparison with Coulomb dampers, and optimal placement of friction dampers in a multistorey building. Numerical simulations of a single and a twenty-storey building indicate that Coulomb dampers are effective when the external excitation on the building is known a prioror. Semi-active friction dampers, however, are effective in response reduction of a building subjected to excitations of various intensities. They have been applied to effectively mitigate the responses of buildings under both near-fault and far-field ground motions. The optimum ratio of control gain factors for the Reid and viscous damping is equal to 2/π times the excitation frequency. A sequential suboptimal procedure for damper placement is developed for practical applications. Due to their adaptability to external disturbances, semi-active dampers can greatly enhance the multiobjective performance of buildings under multilevel excitations and will play an important role in performance-based engineering.
Publication Year: 2002
Publication Date: 2002-01-01
Language: en
Type: book-chapter
Indexed In: ['crossref']
Access and Citation
Cited By Count: 6
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot