TY - GEN
T1 - Optimal stiffness distribution of mid-storeyisolated buildings considering storey drift and floor acceleration response
AU - Kohiyama, M.
AU - Takano, Ken'ichi
PY - 2013/11/22
Y1 - 2013/11/22
N2 - This paper formulates a response prediction formula based on complex modal superposition and frequency response functions of single-degree-of-freedom systems for both storey drift and floor acceleration of a mid-storey-isolated building under the assumption of white noise input. This study verifies that the proposed formula can estimate the seismic response of a building accurately, even if a system includes the overdamped mode, by comparing the same with the results of a time-history analysis. To support the structural design of a midstorey-isolated building, the proposed formula is applied to an optimal design problem, which considers the objective function of acceleration response in a superstructure and constraints on storey drifts. A genetic algorithm is employed to obtain the optimal stiffness distribution and damping coefficient of the isolation layer. This study confirms that the acceleration response of the optimal design is successfully reduced, with other responses remaining within acceptable ranges.
AB - This paper formulates a response prediction formula based on complex modal superposition and frequency response functions of single-degree-of-freedom systems for both storey drift and floor acceleration of a mid-storey-isolated building under the assumption of white noise input. This study verifies that the proposed formula can estimate the seismic response of a building accurately, even if a system includes the overdamped mode, by comparing the same with the results of a time-history analysis. To support the structural design of a midstorey-isolated building, the proposed formula is applied to an optimal design problem, which considers the objective function of acceleration response in a superstructure and constraints on storey drifts. A genetic algorithm is employed to obtain the optimal stiffness distribution and damping coefficient of the isolation layer. This study confirms that the acceleration response of the optimal design is successfully reduced, with other responses remaining within acceptable ranges.
KW - Complex complete quadratic combination method
KW - Floor acceleration response
KW - Mid-storey-isolated buildings
KW - Overdamped vibration
KW - Performance-based design
UR - http://www.scopus.com/inward/record.url?scp=84887835414&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84887835414&partnerID=8YFLogxK
U2 - 10.2495/ERES130161
DO - 10.2495/ERES130161
M3 - Conference contribution
AN - SCOPUS:84887835414
SN - 9781845647360
T3 - WIT Transactions on the Built Environment
SP - 191
EP - 202
BT - Earthquake Resistant Engineering Structures IX
T2 - 9th World Conference on Earthquake Resistant Engineering Structures, ERES 2013
Y2 - 8 July 2013 through 10 July 2013
ER -