Optimal Design of Curved Steel Box Girder Composite Decks Based on Response Surface Methodology

BAI Yang; WANG Bo; WANG Yichao; DU Longji; WANG Binxian

doi:10.3724/j.gyjzG23041014

Volume 55 Issue 8

Aug. 2025

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Article Navigation > INDUSTRIAL CONSTRUCTION > 2025 > 55(8): 185-192

BAI Yang, WANG Bo, WANG Yichao, DU Longji, WANG Binxian. Optimal Design of Curved Steel Box Girder Composite Decks Based on Response Surface Methodology[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(8): 185-192. doi: 10.3724/j.gyjzG23041014

Citation:

BAI Yang, WANG Bo, WANG Yichao, DU Longji, WANG Binxian. Optimal Design of Curved Steel Box Girder Composite Decks Based on Response Surface Methodology[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(8): 185-192. doi: 10.3724/j.gyjzG23041014

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Optimal Design of Curved Steel Box Girder Composite Decks Based on Response Surface Methodology

doi: 10.3724/j.gyjzG23041014

1. CCCC Second Highway Engineering Group Co., Ltd., Xi'an 710065, China;
2. CCCC Highway Bridges National Engineering Research Centre Co., Ltd., Beijing 100032, China;
3. School of Highway, Chang'an University, Xi'an 710064, China;
4. CCCC First Highway Consultants Co., Ltd., Xi'an 710075, China

Received Date: 2023-04-10
Available Online: 2025-10-24

Abstract

Abstract

In order to analyze the applicability and reasonable construction details of PBL shear connectors in curved steel box girder steel-concrete composite bridge decks, a local finite element model of the segment considering the influence of global effects was established based on ABAQUS software. The reliability of the finite element model was verified through a comparison with actual bridge loading tests. A comparative analysis was conducted between the new steel-concrete composite bridge deck and the original design. Central Composite Design (CCD) experimental design method was used to conduct finite element analysis at 25 test points. Design Expert software was used to establish an optimized response surface model for the composite bridge deck structure. Three sets of optimized design schemes were obtained through multi-objective optimization. After a comprehensive analysis, the final optimized design results were obtained: the thickness of the steel box girder top plate was set at 18 mm, the thickness of the perforated steel plate for the shear connectors was set at 12 mm, the transverse spacing of the shear connectors was set at 250 mm, and the concrete thickness was set at 120 mm. This resulted in a 23.12% reduction in steel usage and a 17.50% reduction in the number of welds. The cost of the composite bridge deck increased by 10.41% compared to the initial design parameters, yet remained lower than that of the original structure. The mechanical indicators of the bridge deck showed significant improvement, with a particularly notable reduction in the maximum tensile stress of the concrete. These results demonstrated the effectiveness of the optimization.
- curved steel box girder,
- composite bridge deck,
- PBL shear connector,
- response surface methodology,
- optimal design

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References(22)

References

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