Seismic effectiveness of tuned mass dampers considering soil-structure interaction

✍ Scribed by Wu, Jingning; Chen, Genda; Lou, Menglin

• Publisher: John Wiley and Sons
• Year: 1999
• Tongue: English
• Weight: 182 KB
• Volume: 28
• Category: Article
• ISSN: 0098-8847
• DOI: 10.1002/(sici)1096-9845(199911)28:11<1219::aid-eqe861>3.0.co;2-g

✦ Synopsis

This paper presents how soil}structure interaction a!ects the seismic performance of Tuned Mass Dampers (TMD) when installed on #exibly based structures. Previous studies on this subject have led to inconsistent conclusions since the soil and structure models employed considerably di!er from each other. A generic frequency-independent model is used in this paper to represent a general soil}structure system, whose parameters cover a wide spectrum of soil and structural characteristics. The model structure is subjected to a stationary random excitation and the root-mean-square responses of engineering interest are used to measure the TMD's performance. Extensive parametric studies have shown that strong soil}structure interaction signi"cantly defeats the seismic e!ectiveness of TMD systems. As the soil shear wave velocity decreases, TMD systems become less e!ective in reducing the maximum response of structures. For a structure resting on soft soil, the TMD system can hardly reduce the structural seismic response due to the high damping characteristics of soil}structure systems. The model structure is further subjected to the NS component of the 1940 El Centro, California earthquake to con"rm the TMD's performance in a more realistic environment.