Journal of Structural and Construction Engineering

Journal of Structural and Construction Engineering

Optimal parameters of rooftop pools as the structural control system

Document Type : Original Article

Authors
Hosein Ghaffarzadeh 1
Alireza Aran 2
Mohsen Hosseinlou 2
1 Professor, Faculty of Civil Engineering, University of Tabriz, Tabriz. Iran
2 Faculty of Civil Engineering, University of Tabriz, Tabriz. Iran
10.22065/jsce.2024.460956.3432
Abstract
Nowadays, due to the increase in requests to build tanks with different usage (such as water storage or amusement) on the rooftops of the structures, it is necessary to study their effect on the behavior of the structures. During the vibration of the structures under the earthquake excitation, the dissipation of the earthquake energy is provided by the movement of liquid waves inside the pools, the friction of the liquid with the walls of the pools, and the viscosity of the fluid. In such cases, control of the structural behavior is done passively. In passive control systems, it is important to set the optimal parameters of energy-damping systems to increase the efficiency of the structure control. In this research, the behavior of the pool was modeled using the Housner model, and according to the dimensions of the pool and the depth of the liquid, the optimal frequency and damping ratio of the control system were calculated using the pattern search optimization algorithm to reduce the acceleration response. The execution method of the pool on the rooftops of the structure is assumed on elastomeric pads. The obtained results illustrated that the optimal frequency ratio is close to 1 in most cases. As the liquid depth was considered larger, the sensitivity of the optimal parameters and the acceleration of the structure increased. By increasing the depth of the liquid and keeping its ratio to the dimension of the pool constant in the direction of vibration, the control performance of the pool was improved. Also, it was observed that in most cases, increasing the number of stories leads to a decrease in the optimal damping ratio of elastomeric pads.
Keywords
Passive Control
Pool. Optimal
Parameters
Elastomeric Pads
Pattern Search Algorithm

Subjects

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  • Receive Date 19 June 2024
  • Revise Date 06 September 2024
  • Accept Date 02 October 2024