Relation Between Input Energy and Equivalent Monotonic Response Curve
Conference proceedings article
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Publication Details
Author list: Leangheng C., Doung P., Leelataviwat S.
Publisher: Springer Science and Business Media Deutschland GmbH
Publication year: 2023
Volume number: 236 LNCE
Start page: 87
End page: 97
Number of pages: 11
ISBN: 9783031365614
ISSN: 23662557
Languages: English-Great Britain (EN-GB)
Abstract
This study investigates the relation between the input energy and the equivalent monotonic response curve. The relationship is represented by a parameter called the energy factor, which is defined as the ratio of the energy required to push the structure under monotonic loading up to the maximum displacement due to ground motion to the elastic input energy. Single-degree-of-freedom systems were analyzed under selected ground motions. The input energy and the maximum inelastic response were used to calculate the energy factor for each case. The results indicated that the obtained energy factor varied mainly according to the ductility level and were fairly constant except in a short period range. An expression was then derived to predict the energy factor as a function of period, strength, and ductility level. By using the energy factor, the ties between the structural strength, the maximum deformation, and input energy are established. The concept can then be used to design a structure, given the input energy, by calculating the required strength to limit the deformation within the selected target. Finally, the application of the energy factor in an energy-based plastic design of a structure is illustrated. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.
Keywords
energy-based plastic design, Energy factor, monotonic response
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