Proceedings of the XVII Conference of the Italian Association for Wind Engineering: IN-VENTO 2022

Preface
Organization
Contents
Wind Load Assessment of Unitized Double Skin Facades
	1 Introduction
	2 Eurocode 1 Specifications
		2.1 ENV 1991–2-4:1995
		2.2 EN 1991–1-4:2005
		2.3 PrEN 1991–1-4:2020
		2.4 Comparison
	3 Static and Dynamic Behaviour of Double Skin Facades
	4 Experimental Tests and Numerical Simulations
		4.1 Experimental Campaign
		4.2 Numerical Simulations and Comparison
		4.3 Loading of Skins
	5 Conclusions
	References
Global Pressure Coefficients for Building Roofs Revisited
	1 Introduction
	2 Methodology
		2.1 Current Global Pressure Coefficients
		2.2 The Aerodynamic Database
		2.3 Definition of Roof Zoning
		2.4 Extreme Value Analysis
	3 Results and Discussion
		3.1 Global Pressure Coefficients for Flat and Gable Roofs
		3.2 Proposal and Comparison with Current Global Pressure Coefficients
	4 Conclusion
	References
Gust Factor of the Alongwind Response of Structures Subjected to Thunderstorm Outflows
	1 Introduction
	2 Analytical Formulation
	3 Gust Factor Sensitivity to the Modulating Function
	4 Gust Factor Sensitivity to the Modulating Function Parameters
	5 Conclusions
	References
An Analysis of Truck-Driver System Response to Crosswind in Tunnel Exit Conditions
	1 Introduction
	2 Methodology
	3 Numerical Models
		3.1 Vehicle Model
		3.2 Aerodynamic Model
		3.3 Scenario
		3.4 Dynamic Driving Simulator
	4 Results
		4.1 Lateral Deviation and Normalized Load Transfer
		4.2 Timeline of Events
	5 Conclusions
	References
Effects of Downsampling on the Prediction of the Italian Extreme Winds
	1 Introduction
	2 Methodology
		2.1 Uncertainty Due to Downsampling
		2.2 Available Data and Data Processing
	3 Results and Discussion
	4 Conclusion
	References
Insights into the Transcritical Reynolds Number Range Based on Field Measurements of a Wind Turbine Tower
	1 Introduction
	2 Field Measurement
	3 Results
		3.1 Vortex Shedding Spectrum Observed from Measurement on D8 Tower
		3.2 Short Introduction of Further Investigation on Vortex Shedding Load Through Wind Pressure Measurement
	4 Conclusions
	References
A Numerical Assessment to Estimate the Dynamic Factor for Wind Excited Façade Elements Having a Natural Frequency Smaller Than 5 Hz
	1 Introduction
	2 The Dynamic Effects in the European Standard
	3 The Proposed Methodology
		3.1 Loading Pressure Power Spectral Density
		3.2 Single Degree of Freedom Frequency Response
		3.3 Displacement Power Spectral Density
	4 Results
		4.1 Sensitivity Analysis on Dynamic Factor
		4.2 Application Example
	5 Conclusions and Future Work
	References
Uncertainty Quantification in the Aeroelastic Response of a Twin-Box Deck Depending on the Inlet Conditions by CFD Studies
	1 Introduction
	2 Formulation
		2.1 Force Coefficients and Aeroelastic Forces
		2.2 Stochastic Collocation
	3 Problem Description and Methodology
	4 2D URANS Modeling
	5 Results
		5.1 Force Coefficients
		5.2 Flutter Derivatives
	6 Conclusions
	References
Calibration of Wind Action Combination Factors from Experimental Data
	1 Introduction
	2 Combination of Time-Variant Loads
		2.1 Limit State Function
		2.2 Simplified Approach
		2.3 Design Value Method
	3 Calibration of Load Combination Factors
		3.1 Load Models
		3.2 Calibration Methods
	4 Results and Discussion
	5 Conclusions
	References
Mitigation of Interference-Induced Vibrations for Towers in Group Arrangements
	1 Introduction
	2 Methods
		2.1 Literature and Code Approach
		2.2 Wind Tunnel Testing
	3 Results and Discussions
		3.1 Spacing a/D = 1.25, Group Arrangement 4x1
		3.2 Spacing a/D = 1.5, Group Arrangement 2x1
		3.3 Spacing a/D = 1.5, Group Arrangements 2x2 and 2+1
		3.4 Spacing a/D = 1.5, Group Arrangement 4x1
		3.5 Spacing a/D = 1.875, Group Arrangement 4x1
		3.6 Spacing a/D = 2.5, Group Arrangement 4x1
	4 Conclusion
	References
Evaluation of Wind Comfort Over the Balconies of an Irregular Tall Building by Using Computational Wind Engineering
	1 Introduction
	2 Numerical Model and Wind Directionality
	3 Numerical Analyses and Results
	4 Conclusions
	References
Effect of the Lateral Mean Recirculation Characteristics on Near-Wake and Bulk Quantities of a 5:1 Rectangular Cylinder
	1 Introduction
	2 Problem Definition and Investigation Methodology
	3 Results and Discussion
	4 Conclusions
	References
Wind Field Simulation and Wind Damage Assessment of Typhoon Rai in the Philippines
	1 Introduction
	2 Methods
	3 Results
	4 Discussions
		4.1 Wind Field Modeling
		4.2 Wind Damage Assessment
	5 Conclusions
	References
Gust Factors, Turbulence Intensities, Roughness Lengths, and Wind Direction Factors of Typhoon Winds in the Philippines
	1 Introduction
	2 Methods
		2.1 Typhoon Wind Field
		2.2 Complex-Terrain Wind Simulation
		2.3 Extraction of Gust Factors, Turbulence Intensities, Roughness Lengths, and Wind Direction Factors
	3 Results and Discussion
		3.1 Validation
		3.2 Effects of Building Density
		3.3 Local Wind Direction
		3.4 Effects of Mid-Rise Buildings on the Boundary Layer
		3.5 Topography
		3.6 Turbulence Intensities
	4 Conclusions
	References
A Multidisciplinary Approach to Optimize the Gust Loading on Groups of Wind Turbine Towers at the Quayside
	1 Introduction
	2 Multidisciplinary Approach
		2.1 Flowchart for the Assessment of Gust Buffeting Response
		2.2 Case Study
	3 Wind Climate
		3.1 Basic Wind Velocity
		3.2 Mean Wind Profile and Peak Velocity Pressure
	4 Aerodynamic Coefficients
		4.1 EN Design Standard
		4.2 Wind Tunnel Tests
	5 Damping
		5.1 Structural Damping
		5.2 Aerodynamic Damping
	6 Conclusions and Perspectives
	References
On the Modeling of Self-damping in Overhead Electrical Line Conductors Subject to Vortex-Induced Vibrations
	1 The Proposed Self-damping Model
	2 The Proposed Self-damping Model
	3 Comparison Between Theoretical and Experimental Results
	4 Conclusions
	References
Influence of Stochastic Load Perturbations on the Performance of a Torsional-Flutter Wind Harvester
	1 Introduction
	2 Methodology
	3 Results
	4 Conclusions
	References
Free-Stream Turbulence Effects on a Square Cylinder with a Forebody Screen at a Small Distance
	1 Introduction
	2 Experimental Set up
	3 Results
	4 Conclusions
	References
Can Wind Lidars Be Used to Calibrate Mean Wind Profiles?
	1 Introduction
	2 Methodology
	3 Numerical Investigation
		3.1 Urban Areas with Mid-Rise Buildings
		3.2 Urban Areas with Low-Rise Buildings
	4 Concluding Remarks
	References
Numerical Investigation of a TLP Wind Turbine Under Wind and Wave Loads
	1 Introduction
	2 Numerical Model
		2.1 TLP Floating Wind Turbine
		2.2 Numerical Modelling Approach
		2.3 Simulation of Wind-Induced and Wave-Induced Loads
	3 Results
	4 Conclusions
	References
Improving Long-Span Bridge Flutter Reliability Through Gyroscopic Stabilizer, Considering Random Aeroelastic Loads
	1 Introduction
	2 Theoretical Background
		2.1 Dynamic Formulation of the Gyroscopic Device
		2.2 Two-Mode Bridge Deck Generalized Formulation for Aeroelastic Instability
	3 Numerical Results
	4 Concluding Remarks
	References
Bridge Flutter Stability in Turbulent Flow
	1 Introduction
	2 Time-Variant Dynamic System
	3 Stability Analyses
		3.1 Broad-Band Variation of the Angle of Attack
		3.2 Narrow-Band Variation of the Angle of Attack
	4 Case Study
		4.1 Hardanger Bridge
		4.2 Aerodynamic Coefficients
	5 Discussion of Results
		5.1 Stability Under Broad-Band Turbulence
		5.2 Stability Under Sinusoidal Gusts
	6 Conclusions
	References
Aerodynamic Loads on Wind Turbine Towers Arranged in Groups with and Without Helical Strakes
	1 Introduction
	2 Case Study
	3 Wind Tunnel Tests
		3.1 Experimental Facility, Set-Up and Models
		3.2 Simulation of the Supercritical Reynolds Number Regime
	4 Discussion of Results
		4.1 Isolated Tower
		4.2 Groups of Towers
	5 Conclusions
	References
Comparison of Wake Oscillator Models to Predict Vortex-Induced Vibration of Tall Chimneys
	1 Introduction
	2 Wake Oscillator Models
		2.1 Structural Oscillator
		2.2 Wake Oscillator
	3 Methodology
		3.1 Analytical Method
		3.2 Numerical Integration Method
	4 Results and Discussion
	5 Conclusions
	References
The Reliability Analysis of Chimneys Due to Random Vortex Shedding
	1 Introduction
	2 Theory
		2.1 Vickery and Basu Model
		2.2 Spectral Analysis
		2.3 Reliability Analysis
	3 Parametric Study
	4 Result and Discussion
		4.1 Turbulence Intensity
		4.2 Structural Damping
		4.3 Correlation Length
	5 Strouhal Number
	6 Conclusions
	References
A Bivariate Statistical Model of Large Pressure Peaks Measured in Wind Tunnel Tests
	1 Introduction
	2 Methods: The Statistical Model
	3 Experimental Setup
	4 Statistical Analysis of Large Negative Pressures
	5 Application of the Statistical Model to Area Averaging of Pressures
	6 Discussion and Conclusions
	References
Drag Coefficient Limitations as Reference Parameter to Estimate Tangential Wind Load Affecting VGS
	1 Introduction
		1.1 Wind Loading on Plants
	2 Materials and Methods
		2.1 Literature Review of Wind-Vegetation Interaction Studies
		2.2 Tangential Action in the Standard
		2.3 Drag Coefficient Classification
		2.4 Clustering of Drag Dataset
	3 Results and Discussion
		3.1 Comparison in Between Glazed and Vegetated Vertical Surfaces
	4 Conclusions
	References
Observation of Flow Downstream of a Bridge Deck Model Using Cobra Probe and Lidars
	1 Introduction
	2 Wind Tunnel Test Setup and Measurement Equipment
	3 Data Analysis and Measurement Results
		3.1 Cobra Probe Data Quality and Orientation
		3.2 Wake Study
		3.3 Comparison of Measurements by Collocated Cobra Probe and Lidars
		3.4 Correlation Study
	4 Discussion and Conclusion
	References
Author Index