Quasi-Static Test Study on Eccentrically Braced Steel Frames with Replaceable Links After Earthquake

ZHOU Xin; WANG Xinwu; YU Yongqiang; LI Tong

doi:10.13204/j.gyjzG20101907

Volume 53 Issue 2

Feb. 2023

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2023 > 53(2): 122-128

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Citation:

ZHOU Xin, WANG Xinwu, YU Yongqiang, LI Tong. Quasi-Static Test Study on Eccentrically Braced Steel Frames with Replaceable Links After Earthquake[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(2): 122-128. doi: 10.13204/j.gyjzG20101907

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Quasi-Static Test Study on Eccentrically Braced Steel Frames with Replaceable Links After Earthquake

doi: 10.13204/j.gyjzG20101907

1. School of Civil Engineering, Henan Polytechnic University, Jiaozuo 454000, China;
2. Henan International Joint Laboratory of New Civil Engineering Structure, Luoyang Institute of Science and Technology, Luoyang 471023, China;
3. School of Civil Engineering, Henan University of Science & Technology, Luoyang 471023, China

Received Date: 2020-10-19
Available Online: 2023-05-25
Publish Date: 2023-02-20

Abstract

Abstract

In recent years, the goal of seismic fortification has gradually shifted from protecting life safety to quickly returning to normal after an earthquake. The semi-rigid connection eccentrically braced steel frame system with replaceable links can be quickly restored to use by replacing the new link after an earthquake.In order to study the seismic performance of the eccentrically braced steel frame repaired after earthquake and demonstrate the feasibility of replacing links after earthquake, a 1:2 scaled eccentrically braced steel frame was first subjected to quasi-static load, then it was repaired with a new links after the earthquake, and perform quasi-static loading tests again. The test results showed that compared with the original specimen, the hysteresis performance, bearing capacity, ductility coefficient, lateral stiffness and energy dissipation performance of the repaired and specimen with replaceable link were not as good as the original specimen, but still retained a certain bearing capacity and generally good energy-dissipating capacity. Through the analysis of inter-storey displacement angle and the rotation angle of the link, it was shown that the overall deformation capacity of the repaired model and the rotation capacity of the link were still very good.The failure mode and strain of key parts of the frame were analyzed to verify the feasibility of replacing the link repair method.
- eccentrically braced frame,
- replaceable member,
- seismic performance,
- quasi-static test,
- seismic retrofit

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References

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