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Seismic structural control using semi-active tuned mass dampers
Yang Runlin1* (杨润林) ，Zhou Xiyuan 1，2# (周锡元) and Liu Xihui3 (刘锡荟)
- Institution of Earthquake Engineering, China Academy of Building Research,
Beijing 100013, China
- School of Architecture and Civil Engineering, Beijing Polytechnic
University, Beijing 100022, China
- Electronic Information Center, Ministry of Information Industry, Beijing
100846, China
Abstract: This paper focuses on how to determine the instantaneous
damping of the semi-active tuned mass damper (SATMD) with continuously variable
damping. An off-and-towards-equilibrium (OTE) algorithm is employed to examine
the control performance of the structure/SATMD system by considering the damping
as an assumptive control action. The damping modification of the SATMD is
carried out according to the proposed OTE algorithm, which is formulated based
on analysis of the structural movement under external excitations, and the
measured responses of the structure at every time instant. As examples two
numerical simulations of a five-storey and a ten-storey shear structures with a
SATMD on the roof are conducted. The effectiveness on vibration reduction of
MDOF systems subjected to seismic excitations is discussed. Analysis results
show that the behavior of the structure with a SATMD is significantly improved
and the feasibility of applying the OTE algorithm to the structural control
design of SATMD is also verified.
Keywords: semi-active TMD; seismic structural control; MDOF;
off-and-towards-equilibrium algorithm
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