Fragility Analysis of Single-Layer Reticulated Shell Structures Subjected to Downbursts

HUO Linsheng; ZHAO Wei; CHEN Chaohao

doi:10.13204/j.gyjzG21071404

Volume 53 Issue 10

Oct. 2023

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HUO Linsheng, ZHAO Wei, CHEN Chaohao. Fragility Analysis of Single-Layer Reticulated Shell Structures Subjected to Downbursts[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(10): 83-87,99. doi: 10.13204/j.gyjzG21071404

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HUO Linsheng, ZHAO Wei, CHEN Chaohao. Fragility Analysis of Single-Layer Reticulated Shell Structures Subjected to Downbursts[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(10): 83-87,99. doi: 10.13204/j.gyjzG21071404

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Fragility Analysis of Single-Layer Reticulated Shell Structures Subjected to Downbursts

doi: 10.13204/j.gyjzG21071404

State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China

Received Date: 2021-07-14
Available Online: 2023-12-18

Abstract

Abstract

Long-span spatial structures are highly sensitive to wind loads, and are vulnerable to downbursts. In view of the lack of performance evaluation method for downburst-resistance of such structures, fragility of the single-layer spherical reticulated shell subjected to downbursts was studied, and a structural fragility analysis method for downburst loads was proposed. Considering the randomness of downburst loads and the uncertainty of structural parameters, the random incremental dynamic analysis (IDA) method was used to solve the structural response under different load intensity. Combined with the fragility analysis theory and quadratic regression analysis, the fragility function of the structure was calculated, and the fragility curves were further drawn to evaluate the downburst-resistance performance of the structure. The results showed that the combination of stochastic IDA method and fragility analysis could effectively evaluate the structural downburst-resistance performance. With the action of downbursts, the single-layer spherical reticulated shell might reach the CP performance point, while the probability of reaching the GI performance point was relatively small.
- downburst,
- single-layer reticulated shell,
- random incremental dynamic analysis,
- fragility

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References

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