Shaking Table Tests of a Three-Story Re-Centering Steel Braced Frame with Sliding Slab Connected to Energy Dissipation Devices

IF 5 2区工程技术 Q1 ENGINEERING, CIVIL

Earthquake Engineering & Structural Dynamics Pub Date : 2025-08-28 DOI:10.1002/eqe.70053

Chung-Che Chou, Chi-Jeng Wu, Li-Yu Huang, Alvaro Córdova, Huang-Zuo Lin, Shu-Hsien Chao, Georgios Tsampras, Chia-Ming Uang, Shih-Ho Chao, Hsin-Yang Chung

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引用次数: 0

Abstract

Reducing residual deformation or earthquake loads on the frame structure can enhance its seismic performance during ground motions. This study explores a novel system that uses a self-centering brace (SCB) to provide the re-centering capability of the frame and a sliding slab to reduce the system's acceleration. The floors are allowed to slide with respect to the re-centering steel frame by adding low-friction Teflon sheets, while various horizontal energy dissipating devices are used to enhance the seismic response of the frame. A self-centering disc-spring device is added to re-center the slab after sliding in Phase 1. In addition to the spring device, a friction device in Phase 2 or a steel-only sandwiched buckling-restrained brace in Phase 3 is incorporated. The floor is “rigidly” connected to the frame in Phase 4, simulating a typical frame construction. Four phases, comprising 32 shaking table tests, were conducted on the specimen. A near-fault motion record from the 2022 Guanshan and Chihshang earthquake was used. Phase 1 tests demonstrated that the SCB and horizontal disc-spring device could fully re-center both the frame and sliding slab at the maximum-considered earthquake (MCE) level. In Phases 2 and 3, the addition of horizontal energy dissipating devices to the frame reduced slab movement but resulted in higher floor acceleration compared to Phase 1 tests. Compared to Phase 4, the effect of the sliding slab caused a roof drift reduction of 23% and 18%, and a base shear reduction of 15% and 5%, in Phases 2 and 3, respectively.

Summary

A new steel system is evaluated by using self-centering brace to provide the re-centering capability of the frame and a sliding slab to reduce the system's acceleration.
Evaluate the seismic performance by conducting 32 shaking table tests on the full-scale, three-story steel frame in four different phases.
The sliding slab, equipped with SCSDs in parallel with horizontal energy dissipation devices (i.e., FD or H-SBRB), reduced the seismic force on the frame compared to typical steel frames.
The residual displacement of the frame specimen with the self-centering brace is very small at an earthquake intensity close to two times the MCE level.

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带消能装置滑板的三层重定心钢支撑框架振动台试验

减小框架结构的残余变形或地震荷载，可以提高框架结构在地震动作用下的抗震性能。本研究探索了一种新型系统，该系统使用自定心支撑（SCB）来提供框架的重新定心能力，并使用滑动板来降低系统的加速度。通过添加低摩擦聚四氟乙烯板，允许地板相对于重新定心的钢框架滑动，同时使用各种水平能量耗散装置来增强框架的地震响应。在第一阶段滑动后，增加了自定心圆盘弹簧装置来重新定心。除了弹簧装置外，阶段2中还包括一个摩擦装置，阶段3中还包括一个钢夹式防屈曲支撑。在第4阶段，地板与框架“刚性”连接，模拟典型的框架结构。对试件进行了4期32次振动台试验。利用了2022年关山和池上地震的近断层运动记录。第一阶段试验表明，SCB和水平盘簧装置可以在最大考虑地震（MCE）级别上完全使框架和滑动板重新居中。在第二阶段和第三阶段，在框架上增加水平能量耗散装置减少了楼板的移动，但与第一阶段试验相比，导致楼板加速度更高。与第4阶段相比，在第2阶段和第3阶段，滑动板的作用使顶板漂移减少了23%和18%，基底剪切减少了15%和5%。采用自定心支撑提供框架的重新定心能力，并采用滑动板降低系统的加速度，对一种新型钢结构体系进行了评价。通过在四个不同阶段对全尺寸三层钢框架进行32次振动台试验来评估抗震性能。与典型钢框架相比，滑动板上安装了与水平消能装置（即FD或H-SBRB）平行的scsd，减少了框架上的地震力。当地震烈度接近MCE水平的两倍时，自定心支撑框架试件的残余位移非常小。

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来源期刊

Earthquake Engineering & Structural Dynamics 工程技术-工程：地质

CiteScore

7.20

自引率

13.30%

发文量

180

审稿时长

4.8 months

期刊介绍： Earthquake Engineering and Structural Dynamics provides a forum for the publication of papers on several aspects of engineering related to earthquakes. The problems in this field, and their solutions, are international in character and require knowledge of several traditional disciplines; the Journal will reflect this. Papers that may be relevant but do not emphasize earthquake engineering and related structural dynamics are not suitable for the Journal. Relevant topics include the following: ground motions for analysis and design geotechnical earthquake engineering probabilistic and deterministic methods of dynamic analysis experimental behaviour of structures seismic protective systems system identification risk assessment seismic code requirements methods for earthquake-resistant design and retrofit of structures.