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Earthquakes and Structures Volume 3, Number 3, June-August 2012 , pages 341-363 DOI: https://doi.org/10.12989/eas.2012.3.3.341 |
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Criteria for processing response-spectrum-compatible seismic accelerations simulated via spectral representation |
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A. Zerva, H. Morikawa and S. Sawada
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| Abstract | ||
| The spectral representation method is a quick and versatile tool for the generation of spatially variable, response-spectrum-compatible simulations to be used in the nonlinear seismic response evaluation of extended structures, such as bridges. However, just as recorded data, these simulated accelerations require processing, but, unlike recorded data, the reasons for their processing are purely numerical. Hence, the criteria for the processing of acceleration simulations need to be tied to the effect of processing on the structural response. This paper presents a framework for processing acceleration simulations that is based on seismological approaches for processing recorded data, but establishes the corner frequency of the high-pass filter by minimizing the effect of processing on the response of the structural system, for the response evaluation of which the ground motions were generated. The proposed two-step criterion selects the filter corner frequency by considering both the dynamic and the pseudo-static response of the systems. First, it ensures that the linear/nonlinear dynamic structural response induced by the processed simulations captures the characteristics of the system | ||
| Key Words | ||
| acceleration simulations; velocity and displacement time series; spatial variation; response spectrum; spectral representation; processing; corner frequency; high-pass filter; nonlinear seismic response; bridges | ||
| Address | ||
| A. Zerva: Department of Civil, Architectural and Environmental Engineering, Drexel University, 3141 Chestnut Street, Philadelphia, PA 19104, USA; H. Morikawa: Department of Built Environment, Tokyo Institute of Technology, 4259-G3-7 Nagatsuta, Midori-ku, Yokohama 226-8502, Japan; S. Sawada: Disaster Prevention Research Institute, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan | ||