Search results for "Peak ground acceleration"

showing 4 items of 4 documents

Vibration control strategy for large-scale structures with incomplete multi-actuator system and neighbouring state information

2016

The synthesis of optimal controllers for vibrational protection of large-scale structures with multiple actuation devices and partial state information is a challenging problem. In this study, the authors present a design strategy that allows computing this kind of controllers by using standard linear matrix inequality optimisation tools. To illustrate the main elements of the new approach, a five-story structure equipped with two interstory actuation devices and subjected to a seismic disturbance is considered. For this control setup, three different controllers are designed: an ideal state-feedback H 8 controller with full access to the complete state information and two static output-fee…

0209 industrial biotechnologyPeak ground accelerationEngineeringLarge-scale controlControl and OptimizationScale (ratio):Informàtica::Automàtica i control [Àrees temàtiques de la UPC]Vibration controlFull scaleEdificis -- Vibració020101 civil engineering:Enginyeria civil::Materials i estructures [Àrees temàtiques de la UPC]02 engineering and technologyDesign strategyFeedback control systems0201 civil engineeringStructural vibration controlControl d'estructures (Enginyeria)020901 industrial engineering & automationControl theoryLMI optimizationBuildings -- VibrationElectrical and Electronic Engineeringbusiness.industryPartial state informationLinear matrix inequalityControl engineeringComputer Science Applications1707 Computer Vision and Pattern RecognitionComputer Science ApplicationsHuman-Computer InteractionControl and Systems Engineering; Electrical and Electronic Engineering; Human-Computer Interaction; Computer Science Applications1707 Computer Vision and Pattern Recognition; Control and OptimizationControl and Systems EngineeringSistemes de control per retroaccióBuildings--VibrationStructural control (Engineering)ActuatorbusinessStatic output-feedback control
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A new hybrid procedure for the definition of seismic vulnerability in Mediterranean cross-border urban areas

2016

Assessment of seismic vulnerability of urban areas provides fundamental information for activities of planning and management of emergencies. The main difficulty encountered when extending vulnerability evaluations to urban contexts is the definition of a framework of assessment appropriate for the specific characteristics of the site and providing reliable results with a reasonable duration of surveys and post-processing of data. The paper proposes a new procedure merging different typologies of information recognized on the territories investigated and for this reason called “hybrid.” Knowledge of historical events influencing urban evolution and analysis of recurrent building technologie…

Atmospheric SciencePeak ground accelerationIndex (economics)Vulnerability indexVulnerability index0211 other engineering and technologiesVulnerability020101 civil engineering02 engineering and technology0201 civil engineeringSeismic riskNatural hazardVulnerability curveEarth and Planetary Sciences (miscellaneous)Seismic riskDuration (project management)MasonryWater Science and TechnologyEstimation021110 strategic defence & security studiesPushoverbusiness.industryPGAEnvironmental resource managementVulnerability curvesSettore ICAR/09 - Tecnica Delle CostruzioniMasonry; PGA; Pushover; Seismic risk; Vulnerability curves; Vulnerability index;businessCartographyNatural Hazards
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Incremental dynamic based fragility assessment of reinforced concrete structures: Stationary vs. non-stationary artificial ground motions

2017

Abstract Artificial and natural records are commonly employed by researches and practitioners to perform refined seismic assessments of structures. The techniques for the generation of artificial records and their effectiveness in producing signals which are significantly representative of real earthquakes are still debated as well as results of the consequent seismic assessment to expect from their application. The paper presents an in-depth comparative study highlighting the effect of employing different typologies of artificial ground motion records on seismic assessment results, especially addressing seismic fragility curves. Three sets of 50 stationary, nonstationary evenly modulated a…

EngineeringPeak ground accelerationIncremental dynamic analysi0211 other engineering and technologiesSoil Science020101 civil engineering02 engineering and technologyIncremental dynamic analysisSpectral accelerationIncremental Dynamic Analysis0201 civil engineeringFragilitySeismic assessmentReinforced concrete structuresNonlinear dynamic analysiNon-stationary random processeNonlinear dynamic analysisCivil and Structural EngineeringReinforced concrete structureFragility curves021110 strategic defence & security studiesbusiness.industryArtificial accelerogramsNon-stationary random processesStructural engineeringArtificial accelerograms; Fragility curves; Incremental dynamic analysis; Non-stationary random processes; Nonlinear dynamic analysis; Reinforced concrete structures; Civil and Structural Engineering; Geotechnical Engineering and Engineering Geology; Soil ScienceGeotechnical Engineering and Engineering GeologyReinforced concreteArtificial accelerograms Non-stationary random processes Nonlinear dynamic analysis Incremental dynamic analysis Fragility curves Reinforced concrete structuresNonlinear systemTime historyArtificial accelerogramFragility curvebusiness
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Fractional Tajimi–Kanai model for simulating earthquake ground motion

2014

The ground acceleration is usually modeled as a filtered Gaussian process. The most common model is a Tajimi–Kanai (TK) filter that is a viscoelastic Kelvin–Voigt unit (a spring in parallel with a dashpot) carrying a mass excited by a white noise (acceleration at the bedrock). Based upon the observation that every real material exhibits a power law trend in the creep test, in this paper it is proposed the substitution of the purely viscous element in the Kelvin Voigt element with the so called springpot that is an element having an intermediate behavior between purely elastic (spring) and purely viscous (dashpot) behavior ruled by fractional operator. With this choice two main goals are rea…

PhysicsPeak ground accelerationGround motionBuilding and ConstructionWhite noiseMechanicsGeotechnical Engineering and Engineering GeologyFree fieldViscoelasticityDashpotsymbols.namesakeAccelerationGeophysicsSpring (device)Fractional viscoelasticitysymbolsTajimi–Kanai filterGaussian processCivil and Structural Engineering
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