A novel structural wall with hinge support and buckling restrained braces (BRBs) set in the base (HWBB) is studied. HWBB can be applied to precast manufacturing due to its considerable ductility and the separate loading mechanism in HWBB–frame structure. In elastic stage, BRBs play a brace role to make the hinged wall resist horizontal forces like a shear wall. BRBs dissipate seismic energy through plastic and hysteresis effects after yielding and the damage is only concentrated in BRBs. The performance of an HWBB is equivalent to a shear wall structure with excellent ductility and stable energy dissipation capacity. Numerical analysis indicates that the hinged wall body in the HWBB well controls the deformation mode of the structure, avoiding the concentration of story drifts, thereby protecting the remaining parts of the structure. It is revealed that the moments of the wall body will generate significant increments after BRBs yielding, and the Seismic Intensity Superposition Method is proposed to calculate the moments. In this method, nonlinear response of an HWBB can be regarded as the sum of the responses of two elastic corresponding structures excited with two parts of the seismic intensity, respectively. Modes and moments equations of the hinged wall with uniform distribution of stiffness and mass are derived, and calculation results coincide with that of the nonlinear time history analysis (NHA). For a more general case, the white noise scan method is proposed to solve the structure’s natural characteristics and to further calculate the response. Finally, the post-yielding moment calculation method and the process based on design response spectrum are proposed. It is proved that the moments from proposed Seismic Intensity Superposition Method can envelop most of the moments from NHA, and it is a good estimate of the response of HWBB in nonlinear stage.

中文翻译：

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基部带屈曲约束支撑的铰支墙后屈服行为

研究了一种在底座（HWBB）中设置铰链支撑和屈曲约束支撑（BRB）的新型结构墙。由于 HWBB 具有相当大的延展性和 HWBB-框架结构中的单独加载机制，HWBB 可应用于预制制造。在弹性阶段，BRBs起到支撑作用，使铰链墙像剪力墙一样抵抗水平力。BRBs在屈服后通过塑性和滞后效应耗散地震能量，并且破坏仅集中在BRBs中。HWBB的性能相当于剪力墙结构，具有优良的延展性和稳定的耗能能力。数值分析表明，HWBB中的铰链墙体很好地控制了结构的变形方式，避免了层间漂移的集中，从而保护了结构的其余部分。研究表明，BRBs屈服后墙体弯矩会产生显着的增量，提出了地震烈度叠加法计算弯矩。在该方法中，HWBB的非线性响应可以看作是两个弹性对应结构分别被两部分地震烈度激发的响应之和。推导了刚度和质量均匀分布的铰链壁的模态和力矩方程，计算结果与非线性时程分析（NHA）的计算结果一致。对于更一般的情况，提出了白噪声扫描方法来求解结构的自然特征并进一步计算响应。最后，提出了基于设计响应谱的屈服后弯矩计算方法和流程。