| Summary: | 碩士 === 國立中興大學 === 土木工程學系所 === 97 === The design and application of linear typed tuned mass damper(TMD) systems are well developed, nonlinear TMD systems are still developing.In this paper, statement about friction typed TMD system, which is one kinds of nonlinear TMD. Friction typed TMD energy dissipating by friction mechanism, there is no need for the installation of extra damping device. But passive friction multiple TMD(PF-MTMD) slip load is fixed and pre-determined value. The PF-MTMD may lose its tuning and energy dissipating ability when the PF-MTMD is in its stick state. In order to overcome this problem, a semi-active friction multiple TMD(SAF-MTMD) in this paper.
SAF-MTMD is composed of a mass and a semi-active friction device (SAFD). The friction forces of the SAFD is controllable. A non-sticking friction (NSF) control law, which is able to keep SAF-MTMD activated throughout an earthquake with arbitrary intensity, was conducted. The performance of PF-MTMD and SAF-MTMD for protection of seismic structures was investigated numerically.
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