基于鲁棒性和可靠性的钢梁设计优化

IF 1.1 Q3 ENGINEERING, CIVIL

Archives of Civil Engineering Pub Date : 2023-12-21 DOI:10.24425/ace.2023.147651

P. Zabojszcza, U. Radoń, Piotr Tauzowski

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引用次数: 0

摘要

:根据现代设计原则，建筑结构不仅要安全，还要优化。在确定性优化中，结构的不确定性并未明确考虑在内。传统上，结构系统的不确定性（即材料参数、荷载、截面尺寸）是通过设计规范中规定的部分安全系数来考虑的。值得注意的是，最优结构对设计参数的随机性很敏感，而确定性最优解可能会降低可靠性水平。RBDO的适用性很大程度上取决于连接能力密度函数的可用性。在本文中，作者以钢梁为例，阐述了两种优化方法的优缺点。

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Robust and reliability-based design optimization of steel beams

: In line with the principles of modern design a building structure should not only be safe but also optimized. In deterministic optimization, the uncertainties of the structures are not explicitly taken into account. Traditionally, uncertainties of the structural system (i.e. material parameters, loads, dimensions of the cross-sections) are considered by means of partial safety factors speciﬁed in design codes. Worth noticing, that optimal structures are sensitive to randomness design parameters and deterministic optimal solutions may lead to reduced reliability levels. It therefore seems natural to extendtheformulationofdeterministicoptimizationwiththerandomscatterofparametervalues.Suchaformulationisoﬀeredbyrobustoptimizationandreliability-baseddesignoptimization.Theapplicability ofRBDOisstronglydependentontheavailabilityofthejointprobabilitydensityfunction.Aformulationofnon-deterministicoptimizationthatbetteradaptstothedesignrealitiesisrobustoptimization. UnlikeRBDOoptimization,thisformulationdoesnotrequireestimationoffailureprobabilities.Inthepaperusingtheexamplesofsteelbeams,theauthorscomparethestrengthsandweaknessesofboth formulations

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来源期刊

Archives of Civil Engineering ENGINEERING, CIVIL-

CiteScore

1.50

自引率

28.60%

发文量

审稿时长

24 weeks

期刊介绍： ARCHIVES OF CIVIL ENGINEERING publish original papers of the theoretical, experimental, numerical and practical nature in the fields of structural mechanics, soil mechanics and foundations engineering, concrete, metal, timber and composite polymer structures, hydrotechnical structures, roads, railways and bridges, building services, building physics, management in construction, production of construction materials, construction of civil engineering structures, education of civil engineers.