|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|303901||512759||2016||5 صفحه PDF||سفارش دهید||دانلود رایگان|
• The energy factor of self-centering systems is quantified and derived.
• The influence of hysteretic features is appreciable.
• The Newmark and Hall spectra might lead to biased estimation.
• The proposed energy factor can be used to establish energy based procedures.
This research focuses on the seismic energy factor of self-centering systems. Based on energy balance concept, the energy factor of self-centering systems is derived. To clarify the influence of hysteretic parameters on the energy factor, nonlinear dynamic analyses of flag-shaped single-degree-of-freedom systems are performed. An ensemble of near-fault earthquake ground motion records is used as excitations. Numerical evaluations considering different combinations of hysteretic nonlinear parameters including the post-yielding stiffness ratio and ductility factor are performed. A comparison with the widely used design spectra is also made. The dispersion of analyses results is also presented. Results indicate that the energy factor of self-centering systems is appreciably influenced by nonlinear parameters (the ductility factor and post-yielding stiffness ratio). Results of this study are instructive for the revelation of the energy balance mode of self-centering systems, and they can be helpful to enhance and improve the current procedures based on energy balance concept.
Journal: Soil Dynamics and Earthquake Engineering - Volume 84, May 2016, Pages 169–173