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

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Бібліографічні деталі
Опубліковано в::	PLoS One vol. 20, no. 12 (Dec 2025), p. e0339267
Автор:	Tian, Zhongchu
Інші автори:	Dai, Ye, Wang, Shiyao, Zhang, Wei
Опубліковано:	Public Library of Science
Предмети:	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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Короткий огляд:	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
Джерело:	Health & Medical Collection