Seismic Fragility Analysis of Steel Frames Considering Irregularly-Shaped Panel Zone Shear Deformation

SUI Weining; YANG Haitao; MA Yong; WANG Xueli; DONG Zheng

doi:10.3724/j.gyjzG22110203

Volume 55 Issue 9

Sep. 2025

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2025 > 55(9): 159-167

SUI Weining, YANG Haitao, MA Yong, WANG Xueli, DONG Zheng. Seismic Fragility Analysis of Steel Frames Considering Irregularly-Shaped Panel Zone Shear Deformation[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(9): 159-167. doi: 10.3724/j.gyjzG22110203

Citation:

SUI Weining, YANG Haitao, MA Yong, WANG Xueli, DONG Zheng. Seismic Fragility Analysis of Steel Frames Considering Irregularly-Shaped Panel Zone Shear Deformation[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(9): 159-167. doi: 10.3724/j.gyjzG22110203

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Seismic Fragility Analysis of Steel Frames Considering Irregularly-Shaped Panel Zone Shear Deformation

doi: 10.3724/j.gyjzG22110203

1. School of Civil Engineering, Shenyang Jianzhu University, Shenyang 110168, China;
2. China Northeast Architecture Design and Research Institute, Shenyang 110055, China

Received Date: 2022-11-02
Available Online: 2025-11-05

Abstract

Abstract

Due to the different spatial layout of the building， there are irregular-shaped panel zones in the steel frame for unequal height of the left and right beams. In order to study the effect of shear deformation in these irregular-shaped panel zones on the seismic fragility of steel frames， a mathematical model for evaluating the shear deformation performance of such irregular-shaped panel zones was developed. This model was based on numerical simulations of 40 sets of irregular-shaped panel zones， combined with existing test data. Afterwards， OpenSEES was used to analyze the seismic fragility of the steel frame mode， considering the shear deformation in panel zones. This study examined the influence of several key parameters on seismic performance： the beam depth ratio， span ratio， column-beam strength ratio， and beam-column's linear stiffness ratio. The results showed that varying the depth ratio of beams had a significant effect on the seismic fragility of the steel frame under ground motions of the same intensity. With the depth ratio of the beams ranging from 0.571 to 1.000， a smaller ratio resulted in better seismic performance of the structure.When reaching the four limit states， the failure probability of the steel frame was the lowest at a beam depth ratio of 0.571， indicating the optimal seismic performance of the structure. Variations in span ratios within the range of 0.871 to 1.086 had a relatively limited effect on the vulnerability of the structure， suggesting that this range can be considered a stable safety interval.
- irregular-shaped panel zone,
- shear deformation,
- seismic fragility,
- beam depth ratio,
- span ratio

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References(23)

References

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