Robustness of SDOF elastoplastic structure subjected to double-impulse input under simultaneous uncertainties of yield deformation and stiffness |
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| Affiliation: | 1. Laboratory for Future Interdisciplinary Research of Science and Technology, Institute of Innovative Research, Tokyo Institute of Technology, Nagatsuta 4259, Yokohama 226-8503, Japan;2. Department of Architecture and Architectural Engineering, Graduate School of Engineering, Kyoto University, Kyotodaigaku-Katsura, Nishikyo, Kyoto 615-8540, Japan;1. Radiation Application Research School, Nuclear Science and Technology Research Institute, 31465-1498 Karaj, Iran;2. Department of Physics, Faculty of Science, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia;3. Department of Material Science & Engineering, National University of Singapore, 119077 Singapore, Singapore;4. Department of Chemistry, Faculty of Science, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia;5. Institute of Advanced Technology, University Putra Malaysia, 43400 Serdang, Selangor, Malaysia;1. Dipartimento di Scienze della Terra, Università degli Studi di Milano, Via Botticelli 23, 20133, Milano, Italy;2. CNR − Istituto di Cristallografia, Sede di Bari, Via G. Amendola 122/O, Bari, Italy;3. Dipartimento di Scienze della Terra, Università di Pisa, Via Santa Maria, 53, 56126, Pisa, Italy;4. Dipartimento di Scienze della Terra e Geoambientali - Università degli Studi di Bari “Aldo Moro”, via E. Orabona 4, I-70125, Bari, Italy;5. ESRF − European Synchrotron Radiation Facility, 71 Avenue des Martyrs, CS40220, 38043, Grenoble Cedex, France |
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| Abstract: | A series of impulse-type inputs has been extensively used to evaluate the critical response of an elastoplastic structure subjected to diverse types of pulse-type inputs, including a near-fault ground motion. In this paper, we consider the critical double-impulse input for a single-degree-of-freedom elastic–perfectly plastic structure, and study effects of structural uncertainties. When the natural frequency (or, equivalently, the stiffness) is fixed, the critical response of the structure does not necessarily decrease as the yield deformation (or, equivalently, the yield force) increases. As the first contribution, we give through investigation of this non-monotonicity property. Moreover, we present a systematic method for finding the worst-case scenario when the yield deformation and the stiffness of a structure assumed to be uncertain simultaneously. Numerical examples are presented to illustrate that the robustness of a structure does not necessarily improve when the yield deformation and/or the yield force is increased. |
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| Keywords: | Double impulse Elastoplastic response Critical response Info-gap model Robustness Uncertainty |
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