Theoretical and experimental research on a new system of semi-active
structural control with variable stiffness and damping
Zhou Fulin (周福霖)1†,
Tan Ping (谭平)1‡,
Yan Weiming (阎维明)2†and
Wei Lushun (魏陆顺)1‡
1. Guangzhou University, Guangzhou 510405, China
2. Beijing polytechnic University, Beijing 100032, China
Abstract: In this paper, a new system of semi active structural
control with active variable stiffness and damping (AVSD) is suggested. This new
system amplifies the structural displacement to dissipate more energy, and in
turn, effectively reduces the structural response in the case of relatively
small story drifts, which occur during earthquakes. A predictive instantaneous
optimal control algorithm is established for a SDOF structure equipped with an
AVSD system Comparative shaking table tests of a 1/4 scale single story
structural model with a full scale control device have been conducted. From the
experimental and analytical results, it is shown that when compared to
structures without control or with the active variable stiffness control alone,
the suggested system exhibits higher efficiency in controlling the structural
response, requires less energy input, operates with higher reliability, and can
be manufactured at a lower cost and used in a wider range of engineering
applications.
Keywords: semi-active structural control; variable stiffness and
damping; control device; control algorithm; shaking table test
