Search results for "Wind load"

showing 2 items of 2 documents

Reliability-based design optimization of trusses under dynamic shakedown constraints

2019

A reliability-based design optimization problem under dynamic shakedown constraints for elastic perfectly plastic truss structures subjected to stochastic wind actions is presented. The simultaneous presence of quasi-static (cyclic) thermal loads is also considered. As usual in the shakedown theory, the quasi-statical loads will be defined as variable within a deterministic domain, while the dynamic problem will be treated considering an extended Ceradini-Gavarini approach. Some sources of uncertainties are introduced in the structural system and in the load definition. The reliability-optimization problem is formulated as the minimization of the volume of the structure subjected to determi…

Mathematical optimizationControl and OptimizationOptimization problemComputer scienceMonte Carlo methodStructural system0211 other engineering and technologiesTruss02 engineering and technology0203 mechanical engineeringDynamic problemReliability-based designDynamic shakedownReliability (statistics)021106 design practice & managementElastic plastic trusseProbabilistic logicComputer Science Applications1707 Computer Vision and Pattern RecognitionComputer Graphics and Computer-Aided DesignComputer Science ApplicationsShakedown020303 mechanical engineering & transportsControl and Systems EngineeringSettore ICAR/08 - Scienza Delle CostruzioniSoftwareStochastic wind loadStructural and Multidisciplinary Optimization
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An efficient framework for the elasto-plastic reliability assessment of uncertain wind excited systems

2016

Abstract In this paper a method to efficiently evaluate the reliability of elastic-perfectly plastic structures is proposed. The method is based on combining dynamic shakedown theory with Subset Simulation. In particular, focus is on describing the shakedown behavior of uncertain elasto-plastic systems driven by stochastic wind loads. The ability of the structure to shakedown is assumed as a limit state separating plastic collapse from a safe, if not elastic, state of the structure. The limit state is therefore evaluated in terms of a probabilistic load multiplier estimated through solving a series of linear programming problems posed in terms of the responses of the underlying linear elast…

Subset Simulation.Mathematical optimizationLinear programmingLinear elasticityProbabilistic logicDynamic wind effect020101 civil engineering02 engineering and technologyBuilding and ConstructionWind loadReliability analysi0201 civil engineeringShakedown020303 mechanical engineering & transportsElasto-plastic structure0203 mechanical engineeringExcited stateSubset simulationMultiplier (economics)Limit state designSettore ICAR/08 - Scienza Delle CostruzioniSafety Risk Reliability and QualityDynamic shakedownCivil and Structural EngineeringMathematicsStructural Safety
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