Parametric Analysis of Prestressed Precast Concrete Frames with Buckling-Restrained Braces

QING Yuan; GONG Zhaohui; WANG Chunlin; ZENG Bin

doi:10.3724/j.gyjzG24091802

Volume 54 Issue 10

Oct. 2024

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2024 > 54(10): 31-37

QING Yuan, GONG Zhaohui, WANG Chunlin, ZENG Bin. Parametric Analysis of Prestressed Precast Concrete Frames with Buckling-Restrained Braces[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(10): 31-37. doi: 10.3724/j.gyjzG24091802

Citation:

QING Yuan, GONG Zhaohui, WANG Chunlin, ZENG Bin. Parametric Analysis of Prestressed Precast Concrete Frames with Buckling-Restrained Braces[J]. INDUSTRIAL CONSTRUCTION, 2024, 54(10): 31-37. doi: 10.3724/j.gyjzG24091802

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Parametric Analysis of Prestressed Precast Concrete Frames with Buckling-Restrained Braces

doi: 10.3724/j.gyjzG24091802

1. Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education, Southeast University, Nanjing 210096, China;
2. Central Research Institute of Building and Construction Co., Ltd., MCC Group, Beijing 100088, China

Received Date: 2024-09-18
Available Online: 2024-11-06

Abstract

Abstract

To promote the application of precast concrete frames in earthquake hazard areas, a new prestressed precast concrete frame with buckling-restrained braces (BRB-PPCF) was proposed, and the nonlinear dynamic time-history analysis of 6-story, 9-story and 12-story BRB-PPCF cases under 20 earthquake waves were carried out. The results showed that the average maximum inter-story drift ratios θ_max of BRB-PPCFs were less than 2.0% and the maximum residual inter-story drift ratios θ_r were less than 0.5% under both rare and extremely rare seismic intensity. The θ_max and θ_r values of BRB-PPCFs gradually decreased with the decrease of the initial stiffness ratio α_c between the moment-resistant sub-frame (MSF) and the truss sub-system (TSS). Reducing the α_c value of BRB-PPCF effectively improved its seismic performance and post-earthquake recoverability. The θ_max and θ_r values of BRB-PPCFs decreased first and then increased with the increase of the ratio ψ of the MSF inter-story shear force at linear limit state and the TSS shear force at yield state, and the influence of the ψ was relatively small. The effects of the ratio σ_pi/σ_plbetween the initial tensile stress and the proportional ultimate strength on the θ_max and θ_r values of the BRB-PPCF could be ignored.
- precast concrete,
- buckling-restrained brace,
- post-tensioned prestressing,
- seismic performance,
- parameter analysis

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References

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