TY - JOUR
T1 - Isolator level in height of seismic isolation system with semi-active control
AU - Amamura, Takao Y.
AU - Kohiyama, Masayuki
PY - 2008/1/1
Y1 - 2008/1/1
N2 - Recently, buildings with an isolation device installed in middle story have been constructed. However, an adequate isolation layer level in height of a mid-story isolated building has not been established, and this causes a restriction on design of a plan of a mid-story isolated building. To reduce this restriction, semi-active controlled systems are compared to observe response characteristics. Regarding a control law, velocity feedback based on bilinear optimal control is used. Based on time history analysis with a 30-DOF system, response differences with respect to a position of an isolation layer is studied. It is observed that semi-active control scheme can be used to reduce the absolute acceleration of a roof and the deformation of an isolation layer. On the other hand, much attention must be paid to behavior of a lower structure under seismic excitation in design.
AB - Recently, buildings with an isolation device installed in middle story have been constructed. However, an adequate isolation layer level in height of a mid-story isolated building has not been established, and this causes a restriction on design of a plan of a mid-story isolated building. To reduce this restriction, semi-active controlled systems are compared to observe response characteristics. Regarding a control law, velocity feedback based on bilinear optimal control is used. Based on time history analysis with a 30-DOF system, response differences with respect to a position of an isolation layer is studied. It is observed that semi-active control scheme can be used to reduce the absolute acceleration of a roof and the deformation of an isolation layer. On the other hand, much attention must be paid to behavior of a lower structure under seismic excitation in design.
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U2 - 10.11345/nctam.56.153
DO - 10.11345/nctam.56.153
M3 - Article
AN - SCOPUS:84904266014
VL - 56
SP - 153
EP - 163
JO - Theoretical and Applied Mechanics
JF - Theoretical and Applied Mechanics
SN - 1348-0693
ER -