In this paper, concentric braced frames are combined with moment‐resisting frame (MRF) as a dual system subjected to near‐field (NF) pulse‐like and far‐field ground motions. The braced frame in this system configuration consists of steel buckling‐restrained braces (BRB model), braces with shape memory alloy (SMA model), or combination of BRB and SMA braces (COMBINED model). Some prototype structures of the proposed systems are designed according to the code recommendations. Then, the nonlinear models of the considered structures are developed in SeismoStruct software, and nonlinear time history analysis (NLTHA) is implemented. NLTHA is performed subjected to earthquake record sets at maximum considered earthquake (MCE) and design base earthquake (DBE) levels, and responses of the systems are investigated and compared with each other. Among the examined models, the SMA and COMBINED models exceed the CP level subjected to NF‐MCE record set. Therefore, more investigation is needed for using short‐segment SMA braces in the dual‐steel frames in NF area.

中文翻译：

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双钢框架，由抗弯框架和经受近场地震的形状记忆合金支撑组成

在本文中，同心支撑框架与抗力矩框架（MRF）结合在一起，成为经受近场（NF）脉冲状和远场地面运动的双重系统。此系统配置中的支撑框架由钢屈曲约束支撑（BRB模型），带形状记忆合金的支撑（SMA模型）或BRB和SMA支撑的组合（组合模型）组成。所建议系统的一些原型结构是根据代码建议设计的。然后，在SeismoStruct软件中开发了所考虑结构的非线性模型，并实施了非线性时程分析（NLTHA）。NLTHA在最大地震（MCE）和设计基准地震（DBE）级别经历地震记录集的情况下进行，并且调查了系统的响应并进行了比较。在检查的模型中，SMA和COMBINED模型超出了NF-MCE记录集的CP水平。因此，在NF区域的双钢框架中使用短节SMA支撑需要更多的研究。