Buckling-restrained steel bar damper for spine frame system
Buckling-restrained steel bar damper for spine frame system
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DOI：
10.1016/j.engstruct.2020.111593
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发表时间：
2021-02
影响因子：
5.5
通讯作者：
Jhon Alexander Segura Mateus;H. Tagawa;Xingchen Chen
中科院分区：
文献类型：
--
作者：
Jhon Alexander Segura Mateus;H. Tagawa;Xingchen Chen
本文介绍了一种用于脊柱框架下部的屈曲约束型钢筋阻尼器的试验研究。阻尼器主要由圆形钢管约束的圆形钢筋芯和称为支撑件的附加部件组成，该支撑件为圆形钢管的弯曲屈曲提供横向支撑。该阻尼器的一个特点是其屈曲长度可以通过使用支撑来控制。对10个缩尺试件进行了循环加载试验，以评估所提出的阻尼器的功能和耗能性能。测试样本的不同主要是关于支持者的数量，收缩余量区的数量，连接到基础梁的类型，和阻尼器的长度。根据不同试件结构的循环特性和不同阻尼器构件的力学性能，对阻尼器的性能进行了广泛的讨论。此外，支架连接通过崩溃机制分析进行评估，以确定强度要求。测试结果显示了所提出的系统的最佳配置、功能和塑性变形能力。
This paper presents an experimental investigation on buckling-restrained steel bar dampers used at the lower sides of a spine frame. The dampers are mainly composed of round steel bar cores restrained by round steel tubes, and additional components called supporters that provide the lateral support against flexural buckling of the round steel tube. One characteristic of the proposed damper is that its buckling length can be controlled by using supporters. Cyclic loading tests were conducted on 10 scaled specimens to assess the functionality and energy dissipation performance of the proposed damper. The test specimens differed mainly with regard to the number of supporters, number of contraction allowance zones, type of connection to the base beam, and damper length. The performance of the damper was extensively discussed base on the cyclic behavior of the different specimen configurations and the mechanical performance of the different damper components. Furthermore, the supporter connection was assessed via collapse mechanism analysis to determine strength requirements. The test results revealed the optimal configurations, the functionality, and the plastic deformation capacity of the proposed system.