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Parameter sensitivity analysis and structural optimization of PLC construction method pile cofferdam based on RSM

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Publicado en:PLoS One vol. 20, no. 12 (Dec 2025), p. e0339267
Autor principal: Tian, Zhongchu
Otros Autores: Dai, Ye, Wang, Shiyao, Zhang, Wei
Publicado:
Public Library of Science
Materias:
Mechanical properties
Construction accidents & safety
Structural engineering
Sealing
Investigations
Sensitivity analysis
Parameter sensitivity
Cofferdams
Optimization
Bridge construction
Response surface methodology
Entropy
Safety engineering
Structural design
Metal sheets
Multiple objective analysis
Decision making
Pareto optimum
Economic impact
Pipe piles
Parameter identification
Highway construction
Steel pipes
Steel piles
Construction methods
Variables
Pareto optimization
Cost analysis
Sheet piles
Methods
Deformation
Design optimization
Health care
Environmental
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Resumen:To explore the influence patterns of various structural parameters of the PLC construction method pile cofferdam on its mechanical properties, and to optimize the structural design for enhancing engineering safety and economy, this study relied on the PLC construction method pile cofferdam of the Luoxizhou Super Bridge. Multiple sensitivity analysis methods were employed to identify sensitive parameters. Subsequently, a multi-objective optimization study was conducted based on the identified sensitive parameters. Additionally, the entropy weight TOPSIS decision-making approach was introduced to quantify the advantages and disadvantages of each optimized scheme and the initial design scheme. The results indicate that: (1) Sensitivity rankings derived from the single parameter method and the response surface methodology are consistent across parameters, but the response surface methodology provides more accurate sensitivity quantification. (2) The thicknesses of the steel sheet pile wall, steel pipe pile wall, and bottom-sealing concrete significantly affect the maximum displacement and maximum stress of the cofferdam. (3) The entropy-weighted TOPSIS decision-making can effectively evaluate the advantages and disadvantages of the Pareto solution set optimized by the NSGA-II algorithm. (4) Economic cost and structural performance exhibit a nonlinear synergy: As cost increases, the maximum displacement of the cofferdam decreases markedly, whereas the maximum stress of the bottom-sealing concrete decreases at a slower rate.
ISSN:1932-6203
DOI:10.1371/journal.pone.0339267
Fuente:Health & Medical Collection