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Robustness of Performance-Based Plastic Design Method for SMABFs

机译：基于性能的SMABFs塑料设计方法的鲁棒性

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摘要

Shape memory alloys (SMAs) are gaining increasing attentions from earthquake engineering community, due to the superleastic property, which is capable of offering energy dissipation capacity and recentering ability to various structural systems. SMA braced frames (SMABFs) are emerging as promising frames with advanced seismic resilience. Recently, the performance-based plastic design (PBPD) method was developed for such structural system. However, the robustness of this design approach still needs rigorous examinations by addressing the effects of defining different performance targets or using different seismic design spectra in the design procedure. In doing so, examinations were carried out from two perspectives. The first one set various performance targets combining different interstory drift ratio and brace ductility demand in the design procedure based on the design basis earthquake spectrum, and then the resulting SMABFs were subjected to earthquake ground motions corresponding to design basis hazard level. The second one conducted the design procedure at three seismic hazard levels representative of frequently occurred earthquake, design basis earthquake, and maximum considered earthquake, respectively, and then assessed the seismic performance upon earthquakes associated with three seismic intensities. The analytical results show that the designed frames as per the PBPD method always coincide with the performance targets very well, regardless of the prescribed targets and adopted design spectrum. Therefore, this paper provided sound results which successfully demonstrated the high robustness of the previously developed PBPD method for SMABFs.
机译：形状记忆合金（SMA）由于具有超释放特性，因此能够为各种结构系统提供能量消散能力和集中能力，因此越来越受到地震工程界的关注。 SMA支撑框架（SMABF）逐渐成为具有先进抗震性的有前途的框架。最近，针对这种结构系统开发了基于性能的塑料设计（PBPD）方法。但是，这种设计方法的鲁棒性仍然需要通过解决定义不同性能目标或在设计过程中使用不同地震设计谱的影响来进行严格检查。为此，从两个角度进行了检查。第一个基于设计基准地震频谱，在设计过程中结合不同的层间漂移率和支撑延性要求设定了各种性能指标，然后对所得的SMABF进行对应于设计基准危险等级的地震地震动。第二个程序分别在三个地震危险等级（分别代表频繁发生的地震，设计基准地震和最大考虑的地震）下进行设计程序，然后评估与三个地震烈度相关的地震的抗震性能。分析结果表明，根据PBPD方法设计的框架始终与性能目标非常吻合，无论指定的目标和采用的设计范围如何。因此，本文提供了可靠的结果，成功地证明了先前开发的SMABF的PBPD方法具有很高的鲁棒性。

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