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DEVELOPMENT OF TESTING PROCOTOL FOR LINKS INECCENTRICALLY BRACED FRAMES

机译：偏心支撑框架中的链接测试协议的开发

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An analytical study was conducted to develop a new testing loading protocol for short links ineccentrically braced frames (EBFs). The current loading protocol for links in the AISC SeismicProvisions is a modified version of the moment frame protocol, without a rational basis. Three EBFs weredesigned according to current U.S. seismic provisions and non-linear time-history analyses wereperformed using an ensemble of Los Angeles ground motions scaled to match the design spectralacceleration of each frame. Cumulative and maximum rotation demands obtained from the analysesprovided the basis for the new protocol. The analysis results indicate that the link loading sequencecurrently in the AISC Seismic Provisions is too conservative for short shear links. It has 1.5 times thecumulative rotation demand and a much higher percentage of large cycles than the analysis resultsindicate is necessary. The proposed protocol more accurately represents design earthquake demands.
机译：进行了一项分析研究，以开发针对短链接偏心支撑框架（EBF）的新测试加载协议。 AISC SeismicProvisions中链接的当前加载协议是矩框架协议的修改版本，没有合理的依据。根据当前的美国地震规定设计了三个EBF，并使用洛杉矶地震动的整体进行非线性时程分析，并按比例调整以匹配每个框架的设计频谱加速度。从分析中获得的累积和最大旋转需求为新协议提供了基础。分析结果表明，目前AISC地震规定中的链节加载顺序对于短剪力链而言过于保守。它有1.5倍的累积轮换需求，并且大周期的百分比比分析结果所表明的要高得多。提议的协议更准确地表示设计地震需求。

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