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Structural Engineering and Mechanics
  Volume 15, Number 5, May 2003, pages 513-534
DOI: http://dx.doi.org/10.12989/sem.2003.15.5.513
 


Inelastic seismic response of adjacent buildings linked by fluid dampers
Y. L. Xu, Z. Yang and X. L. Lu

 
Abstract
    Using fluid dampers to connect adjacent buildings for enhancing their seismic resistant performance has been recently investigated but limited to linear elastic adjacent buildings only. This paper presents a study of inelastic seismic response of adjacent buildings linked by fluid dampers. A nonlinear finite element planar model using plastic beam element is first constructed to simulate two steel frames connected by fluid dampers. Computed linear elastic seismic responses of the two steel frames with and without fluid dampers under moderate seismic events are then compared with the experimental results obtained from shaking table tests. Finally, elastic-plastic seismic responses of the two steel frames with and without fluid dampers are extensively computed, and the fluid damper performance on controlling inelastic seismic response of the two steel frames is assessed. The effects of the fundamental frequency ratio and structural damping ratio of the two steel frames on the damper performance are also examined. The results show that not only in linear elastic stage but also in inelastic stage, the seismic resistant performance of the two steel frames of different fundamental frequencies can be significantly enhanced if they are properly linked by fluid dampers of appropriate parameters.
 
Key Words
    adjacent buildings; fluid damper; inelastic seismic response; plastic beam element; numerical simulation; experimental comparison.
 
Address
Department of Civil and Structural Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China
Research Institute of Structural Engineering and Disaster Reduction, Tongji University, Shanghai 200092, China
 

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