Study on Seismic Performance of Buckling Restrained Brace Steel Frame with Weakened Ductile Casting

YIN Zhanzhong; HUANG Yaobang; XU Deyu

doi:10.3724/j.gyjzG23070305

Volume 55 Issue 9

Sep. 2025

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YIN Zhanzhong, HUANG Yaobang, XU Deyu. Study on Seismic Performance of Buckling Restrained Brace Steel Frame with Weakened Ductile Casting[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(9): 141-151. doi: 10.3724/j.gyjzG23070305

Citation:

YIN Zhanzhong, HUANG Yaobang, XU Deyu. Study on Seismic Performance of Buckling Restrained Brace Steel Frame with Weakened Ductile Casting[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(9): 141-151. doi: 10.3724/j.gyjzG23070305

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Study on Seismic Performance of Buckling Restrained Brace Steel Frame with Weakened Ductile Casting

doi: 10.3724/j.gyjzG23070305

1. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
2. Key Laboratory of Disaster Prevention and Mitigation of Gansu Civil Engineering of Lanzhou University of Technology, Engineering Research Center of the Ministry of Education of Disaster Prevention and Mitigation of Western Civil Engineering, Lanzhou 730050, China

Received Date: 2023-07-03
Available Online: 2025-11-05

Abstract

Abstract

To address the issue of brittle fracture of welding joints in special center-supported steel frame systems and achieve multi-staged energy dissipation， a buckling-resistant bracing system with a weakened ductile casting was introduced into the special center-supported steel frame structure. Twelve structural models with different parameters were established using ABAQUS software for low-cycle reciprocating loading. The results showed that the energy dissipation performance of the structure with the new bracing system was excellent， and the non-elastic deformation of the structure was mainly concentrated in the energy dissipation section of the weakening-type ductile casting， which effectively alleviated the stress concentration problem in the welding joint zone. Under the constraint of the sleeve， the length of the energy dissipation section of the weakening-type ductile casting had no significant effect on the energy dissipation performance， ultimate bearing capacity， and stiffness of the model. Combining the ultimate bearing capacity analysis， the seismic performance of the structural system was optimal when the axial force super-strong coefficient was controlled between 0.92 and 1.10. Based on the finite element analysis results， the elastic stiffness and yield bearing capacity of the structure were derived， and the error between the theoretical results and the numerical simulation results was within 10%， indicating satisfactory predictability.
- weakened ductile casting,
- multi-stage energy consumption,
- buckling-restrained brace,
- overstrength factor of axial force,
- yield bearing capacity

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References(22)

References

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