https://scholars.lib.ntu.edu.tw/handle/123456789/625224
標題: | Parameter optimization for Pivot hysteresis model for reinforced concrete columns with different failure modes | 作者: | Ling Y.-C Mogili S SHYH-JIANN HWANG |
關鍵字: | columns; energy dissipation; flexure; hysteresis; optimization; pivot hysteresis model; reinforced concrete; shear | 公開日期: | 2022 | 來源出版物: | Earthquake Engineering and Structural Dynamics | 摘要: | Reliable hysteretic modeling is essential for the evaluation of existing reinforced concrete (RC) buildings. Also, tall buildings and other structures of high importance require reasonably accurate seismic nonlinear time-domain analysis for design, which includes load–displacement behavior and hysteretic modeling. However, the hysteretic behavior of RC members is very complex and challenging to predict. Currently, the Pivot hysteresis model is used to predict the hysteretic response of members with parameters α and β representing the unloading stiffness and pinching, respectively, determined using the geometric and reinforcement details in column members. However, the hysteretic response is fairly different for flexure and shear failure modes and must be accounted for to derive accurate hysteretic predictions. In this paper, an effort has been made to improve the existing approach for columns by deriving α and β separately for flexure and shear modes of failure. The chosen variables to control α and β are axial load ratio (ALR), longitudinal and transverse reinforcement indices. Equations for α and β were calibrated through optimization of energy dissipation from 113 column specimens subjected to cyclic loading, using an advanced optimization algorithm known as Simulated Annealing. The proposed formulations can improve the accuracy of the Pivot hysteresis model for column members by capturing pinching and stiffness degradation more reasonably under different failure modes. The proposed approach can aid design engineers in performing a more reliable and accurate analysis of complex structures. © 2022 John Wiley & Sons Ltd. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85129433466&doi=10.1002%2feqe.3658&partnerID=40&md5=bcc32a34030ab1fb4f824778537b03a7 https://scholars.lib.ntu.edu.tw/handle/123456789/625224 |
ISSN: | 00988847 | DOI: | 10.1002/eqe.3658 | SDG/關鍵字: | Energy dissipation; Failure (mechanical); Failure modes; Forecasting; Hysteresis loops; Reinforced concrete; Seismic design; Simulated annealing; Stiffness; Tall buildings; Unloading; Existing reinforced concrete; Flexure; Hysteresis models; Hysteretic model; Hysteretic response; Optimisations; Parameter optimization; Pivot hysteresis model; Reinforced concrete column; Shear; Hysteresis |
顯示於: | 土木工程學系 |
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