Seismic performance of buckling‐restrained brace outrigger system in various configurations
Seismic performance of buckling‐restrained brace outrigger system in various configurations
复制标题
不同配置下屈曲约束支腿系统的抗震性能
DOI：
10.1002/2475-8876.12120
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发表时间：
2019
影响因子：
0.9
通讯作者：
Takeuchi Toru
中科院分区：
文献类型：
--
作者：
Lin Pao‐Chun;Takeuchi Toru
支腿系统被认为是减轻高层核心筒式建筑地震反应的有效解决方案。通过在支腿系统（BRB-支腿）中加入屈曲约束支撑（BRB），BRB-支腿不仅通过支腿机构，还通过 BRB 迟滞响应的地震能量耗散来降低地震响应。本研究研究了单层 BRB 支腿结构的抗震性能，并提出了三种类型的 BRB 支腿配置，用于满足不同建筑要求的实际设计目的。使用高度为 64、128、256 和 384 m 以及不同支腿跨度的分析模型，通过谱分析和非线性响应历史分析来研究最佳支腿高度和所需的支腿刚度，以实现最小地震响应。根据分析结果提出设计指标和设计图表进行初步设计。利用所提出的设计图演示了具有不同 BRB 支腿配置的结构的设计示例。
The outrigger system is deemed an effective solution for mitigating the seismic responses of tall core‐tube‐type buildings. By incorporating a buckling‐restrained brace (BRB) in the outrigger system (BRB‐outrigger), the BRB‐outrigger reduces seismic response not only through the outrigger mechanism but also through the seismic energy dissipation from the BRB’s hysteretic response. This study investigates the seismic behavior of structures with a single layer BRB‐outrigger and proposes three types of BRB‐outrigger configurations for practical design purposes that fit different architectural requirements. An analytical model, with heights of 64, 128, 256, and 384 m and different outrigger spans was used to investigate the optimal outrigger elevation and required outrigger stiffness for achieving minimum seismic response using spectral analysis and nonlinear response history analysis. The design indexes and design charts based on the analysis results are proposed for preliminary design. Design examples of structures with different BRB‐outrigger configurations utilizing the proposed design charts are demonstrated.