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首页> 外文期刊>Bulletin of earthquake engineering >Evaluating the ductility reduction factors of SDOF self-centering earthquake-resisting structural systems
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Evaluating the ductility reduction factors of SDOF self-centering earthquake-resisting structural systems

机译：评估SDOF自定心地震抗震结构系统的延展性降低因子

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In the past two decades, considerable research works have been directed toward the development of self-centering (SC) earthquake resisting structural systems that are able to make structures usable and repairable after strong ground motions. The focus of these research works is on eliminating the residual deformations and on preventing the earthquake damage in the primary structural components. In comparison with conventional structural systems, the hysteretic responses of SC structural systems are characterized by high levels of post gap-opening stiffness and with low levels of energy dissipation. This indicates that self-centering structural systems may have spectral response characteristics different from those of conventional systems. In this study, the ductility reduction factor (R-mu) which is required for the estimation of the strength demands is evaluated for SC single degree of freedom systems. The results obtained indicate that SC systems generally have R-mu levels lower than those of conventional systems. Modification factors that can be used to relate the R-mu levels of SC systems to those of conventional structural systems are introduced in this study and found capable of accurately predicting the R-mu levels of SC systems.
机译：在过去的二十年里，大量研究工作都集中在开发能够使结构在强震后可用和可修复的自定心（SC）抗震结构系统上。这些研究工作的重点是消除主要结构构件的残余变形和防止地震破坏。与传统结构系统相比，SC结构系统的滞回响应具有较高的间隙后开启刚度和较低的耗能水平。这表明自定心结构系统可能具有不同于常规系统的光谱响应特性。在本研究中，针对SC单自由度系统，评估了估算强度需求所需的延性折减系数（R-mu）。所得结果表明，SC系统的R-mu水平通常低于常规系统。本研究中引入了可用于将SC系统的R-mu水平与常规结构系统的R-mu水平联系起来的修正因子，发现它们能够准确预测SC系统的R-mu水平。

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