Z. Minaei, S. R. H. Vaez, E. Dehghani, Elham Ezzati
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Quantitative Modeling of Pulse-Like Ground Motions Using Imperialist Competitive Optimization Algorithm
Increasing attention in quantitative and qualitative models has been paid to the dominant velocity pulse of the pulse-like ground motions. Manual trial and error approach for fitting of time history and response spectrum of the actual record and simulated pulse has been employed to obtain pulse parameters of these models. In this study, a mathematical model and the imperialist competitive algorithm (ICA) are used to overcome the limitations of the previous studies. For this purpose, an objective function is defined as the norm deviation of the time history and response spectrum of the actual record and simulated pulse. The proposed approach is capable of identifying and extracting the dominant pulse of any pulse-like record, and consists of 91 pulse-like records used in this study. In all of 91 records, the highest accordance with time history and elastic response spectrum of actual records and extracted pulses is achieved. As a case study, the extracted pulses of the 1999 Chi-Chi earthquake are used to generate artificial pulse-like records. The dynamic responses of the 3-story moment frame in SAC project subjected to generated records are investigated. The results show that the proposed approach can be used in parametric studies of pulse-like ground motions.
期刊介绍:
Journal of Earthquake and Tsunami provides a common forum for scientists and engineers working in the areas of earthquakes and tsunamis to communicate and interact with one another and thereby enhance the opportunities for such cross-fertilization of ideas. The Journal publishes original papers pertaining to state-of-the-art research and development in Geological and Seismological Setting; Ground Motion, Site and Building Response; Tsunami Generation, Propagation, Damage and Mitigation, as well as Education and Risk Management following an earthquake or a tsunami.
We welcome papers in the following categories:
Geological and Seismological Aspects
Tectonics: (Geology - earth processes)
Fault processes and earthquake generation: seismology (earthquake processes)
Earthquake wave propagation: geophysics
Remote sensing
Earthquake Engineering
Geotechnical hazards and response
Effects on buildings and structures
Risk analysis and management
Retrofitting and remediation
Education and awareness
Material Behaviour
Soil
Reinforced concrete
Steel
Tsunamis
Tsunamigenic sources
Tsunami propagation: Physical oceanography
Run-up and damage: wave hydraulics.