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Fabio Rizzo received his PhD in 2009 in structural design, wind engineering. Results of his PhD thesis were added in the CNR 207 DT documentation in 2019. He has more than 50 scientific publications in journals and conference proceedings and 27 of them indexed by SCOPUS database. He received a Post-Doc fellowship in the field of Wind Engineering in 2009, a scholarship in the field of computational fluid dynamics in 2014 and a research grant in the field of wind-structure interaction in 2016. Finally, he works as researcher at the Department of Engineering, University G. D’Annunzio, Chieti-Pescara, Italy
This paper describes the results of a numerical and experimental study on the wind-induced effects relevant to the design of specialized nonstructural elements in an unconventionally shaped high-rise building. The purpose was to estimate the wind-induced floor acceleration and to examine the lateral drift ratio for the design of nonstructural elements and the occupants' comfort. Nonstructural elements consist of “smart” screen walls, anchored through stiff, steel connection details to the floor. Wind tunnel measurements of floor accelerations were derived from an aeroelastic model of the high-rise building, replicating the fundamental mode response characteristics of the prototype structure. The model's dynamical properties were inferred from a pilot experiment conducted on a shaking table; estimated natural frequencies and modal damping ratios were used to re-scale accelerations measured in wind tunnel. The model's dynamic properties, influenced by wind loads, were later reconstructed through the Random Decrement Technique (RDT). Ranges of acceptability for accelerations and lateral inter-story drift are provided and examined in the context of nonstructural element design.
Fabio Rizzo; Luca Caracoglia; Giuseppe Piccardo. Examining wind-induced floor accelerations in an unconventionally shaped, high-rise building for the design of “smart” screen walls. Journal of Building Engineering 2021, 43, 103115 .
AMA StyleFabio Rizzo, Luca Caracoglia, Giuseppe Piccardo. Examining wind-induced floor accelerations in an unconventionally shaped, high-rise building for the design of “smart” screen walls. Journal of Building Engineering. 2021; 43 ():103115.
Chicago/Turabian StyleFabio Rizzo; Luca Caracoglia; Giuseppe Piccardo. 2021. "Examining wind-induced floor accelerations in an unconventionally shaped, high-rise building for the design of “smart” screen walls." Journal of Building Engineering 43, no. : 103115.
Video walls, made of closely spaced video screen systems, are currently very used in architecture and interior design applications. To have a continuous image, the gaps between the screens must be limited as much as possible and the vibration of the supporting structure must be reduced to avoid ponding and consequent screens damage. The problem is particularly important when video walls are in rooms inside high-rise buildings that, due to their high deformability, experience significant wind-induced drifts and accelerations. In this case, it is convenient to mount video screens on a three-dimensional lightweight frame substructure (video wall room), supported by the building’s floor. To ensure the limitation of the relative displacements between the screens in case of strong winds, the substructure can be equipped with base isolators capable of mitigating the global response when the buildings’ induced accelerations overcome specific thresholds. This paper is aimed at investigating the wind-induced response of video screen rooms located inside wind-excited high-rise buildings and at providing guidance for the design of the base isolation devices. The floors’ accelerations measured during aeroelastic wind tunnel tests on a high-rise building are applied as base accelerations to a finite element method model of the video room. The parameters of the constitutive behavior of the base isolation system are optimally calibrated as a function of the wind speed and position over the building height.
Fabio Rizzo; Laura Ierimonti; Ilaria Venanzi; Stefano Sacconi. Wind-induced vibration mitigation of video screen rooms in high-rise buildings. Structures 2021, 33, 2388 -2401.
AMA StyleFabio Rizzo, Laura Ierimonti, Ilaria Venanzi, Stefano Sacconi. Wind-induced vibration mitigation of video screen rooms in high-rise buildings. Structures. 2021; 33 ():2388-2401.
Chicago/Turabian StyleFabio Rizzo; Laura Ierimonti; Ilaria Venanzi; Stefano Sacconi. 2021. "Wind-induced vibration mitigation of video screen rooms in high-rise buildings." Structures 33, no. : 2388-2401.
Experimental wind tunnel test results are affected by acquisition times because extreme pressure peak statistics depend on the length of acquisition records. This is also true for dynamic tests on aeroelastic models where the structural response of the scale model is affected by aerodynamic damping and by random vortex shedding. This paper investigates the acquisition time dependence of linear transformation through singular value decomposition (SVD) and its correlation with floor accelerometric signals acquired during wind tunnel aeroelastic testing of a scale model high-rise building. Particular attention was given to the variability of eigenvectors, singular values and the correlation coefficient for two wind angles and thirteen different wind velocities. The cumulative distribution function of empirical magnitudes was fitted with numerical cumulative density function (CDF). Kolmogorov–Smirnov test results are also discussed.
Fabio Rizzo. Investigation of the Time Dependence of Wind-Induced Aeroelastic Response on a Scale Model of a High-Rise Building. Applied Sciences 2021, 11, 3315 .
AMA StyleFabio Rizzo. Investigation of the Time Dependence of Wind-Induced Aeroelastic Response on a Scale Model of a High-Rise Building. Applied Sciences. 2021; 11 (8):3315.
Chicago/Turabian StyleFabio Rizzo. 2021. "Investigation of the Time Dependence of Wind-Induced Aeroelastic Response on a Scale Model of a High-Rise Building." Applied Sciences 11, no. 8: 3315.
This paper discusses the uncertainty when estimating extreme values of wind-induced lateral accelerations in a high-rise building based on wind-tunnel measurements. The acceleration signals for an aeroelastic scale model under ten different velocities and three different wind angles were processed to evaluate the extreme acceleration values. The empirical cumulative distribution function (CDF) and probability density function (PDF) trends of the peaks were estimated and compared with the analytical models, which showed satisfactory fits. An effort was made for the best fit for the empirical CDF through the numerical expansion of the peak set using Polynomial Chaos Expansion (PCE). It was confirmed that in this case, the lack of a reliable fit was not due to the number of peaks. In addition, analytical models of the Gaussian and non-Gaussian processes were applied to estimate the extreme values using the entire process and the sub-processes, and this paper compares and discusses the results. Finally, the variability of the extreme acceleration values estimated using a total of ten different methods is discussed.
Fabio Rizzo; Mingfeng Huang. Peak value estimation for wind-induced lateral accelerations in a high-rise building. Structure and Infrastructure Engineering 2021, 1 -17.
AMA StyleFabio Rizzo, Mingfeng Huang. Peak value estimation for wind-induced lateral accelerations in a high-rise building. Structure and Infrastructure Engineering. 2021; ():1-17.
Chicago/Turabian StyleFabio Rizzo; Mingfeng Huang. 2021. "Peak value estimation for wind-induced lateral accelerations in a high-rise building." Structure and Infrastructure Engineering , no. : 1-17.
The scaling of large structures to investigate their aerodynamics in wind tunnels is a common and robust procedure to estimate important magnitudes, including pressure coefficients. Different aspects can affect the estimation of pressure coefficients; four examples are the non-dimensionalization, blockage, non-stationarity, and non-Gaussianity of the wind tunnel velocity. This paper shows the variability of pressure coefficients due to these four aspects for the case study of a closed box section of a suspended bridge. It was estimated that the pressure coefficients of similar pressure taps vary significantly due to different sets of wind velocity time history used to non-dimensionalize the wind tunnel pressures. In addition, the stationarity of the wind velocity process was not confirmed for all wind velocity sets and the non-Gaussianity of the wind velocity time history was confirmed.
Fabio Rizzo. Sensitivity Investigation on the Pressure Coefficients Non-Dimensionalization. Infrastructures 2021, 6, 53 .
AMA StyleFabio Rizzo. Sensitivity Investigation on the Pressure Coefficients Non-Dimensionalization. Infrastructures. 2021; 6 (4):53.
Chicago/Turabian StyleFabio Rizzo. 2021. "Sensitivity Investigation on the Pressure Coefficients Non-Dimensionalization." Infrastructures 6, no. 4: 53.
This paper examines the results of experiments conducted in a boundary layer wind tunnel on rigid and flexible models of a tensile structure with a hyperbolic paraboloid roof. Pressure tests on the aerodynamic model were used to calculate a numerical finite element model that was used to design the aeroelastic model. The response of the aeroelastic model was then used to calibrate the numerical model. Dynamic identification of the aeroelastic model with and without wind is discussed in terms of natural frequencies and damping ratios. The focus of the experiments was the description of a continuous chain of measurements made of aerodynamic, numerical and aeroelastic models for a structure with several close natural frequencies. The random decrement technique was used to calculate aerodynamic damping of the flexible model. The results indicate that the wind load significantly modifies the natural frequencies of vibration and damping ratios of the structure when compared with the unloaded structure.
Fabio Rizzo; Gregory A. Kopp; Gian Felice Giaccu. Investigation of wind-induced dynamics of a cable net roof with aeroelastic wind tunnel tests. Engineering Structures 2020, 229, 111569 .
AMA StyleFabio Rizzo, Gregory A. Kopp, Gian Felice Giaccu. Investigation of wind-induced dynamics of a cable net roof with aeroelastic wind tunnel tests. Engineering Structures. 2020; 229 ():111569.
Chicago/Turabian StyleFabio Rizzo; Gregory A. Kopp; Gian Felice Giaccu. 2020. "Investigation of wind-induced dynamics of a cable net roof with aeroelastic wind tunnel tests." Engineering Structures 229, no. : 111569.
The behaviour of reinforced concrete frames with masonry wall infills is influenced a lot by the stiffness and strength difference between the frame and the infill, causing early detrimental damage to the infill or to the critical concrete columns. The paper reports the results from shake table seismic tests on a full-scale reinforced concrete (RC) frame building with modified hollow clay block (orthoblock brick) infill walls, within INMASPOL SERA Horizon 2020 project. The building received innovative resilient protection using Polyurethane Flexible Joints (PUFJs) made of polyurethane resin (PU), applied at the frame-infill interface in different schemes. Further, PUs were used for bonding of glass fibre grids to the weak masonry substrate to form Fibre Reinforced Polyurethanes (FRPUs) as an emergency repair intervention. The test results showed enhancement in the in-plane and out-of-plane infill performance under seismic excitations. The results confirmed remarkable delay of significant infill damages at very high RC frame inter-story drifts as a consequence of the use of PUFJs. Further, the PUFJ protection enabled the resilient repair of the infill even after very high inter-story drift of the structure up to 3.7%. The applied glass FRPU system efficiently protected the damaged infills against collapse under out-of-plane excitation while they restored large part of their in-plane stiffness.
Theodoros Rousakis; Alper Ilki; Arkadiusz Kwiecien; Alberto Viskovic; Matija Gams; Petra Triller; Bahman Ghiassi; Andrea Benedetti; Zoran Rakicevic; Camilla Colla; Omer Faruk Halici; Bogusław Zając; Łukasz Hojdys; Piotr Krajewski; Fabio Rizzo; Vachan Vanian; Anastasios Sapalidis; Efthimia Papadouli; Aleksandra Bogdanovic. Deformable Polyurethane Joints and Fibre Grids for Resilient Seismic Performance of Reinforced Concrete Frames with Orthoblock Brick Infills. Polymers 2020, 12, 2869 .
AMA StyleTheodoros Rousakis, Alper Ilki, Arkadiusz Kwiecien, Alberto Viskovic, Matija Gams, Petra Triller, Bahman Ghiassi, Andrea Benedetti, Zoran Rakicevic, Camilla Colla, Omer Faruk Halici, Bogusław Zając, Łukasz Hojdys, Piotr Krajewski, Fabio Rizzo, Vachan Vanian, Anastasios Sapalidis, Efthimia Papadouli, Aleksandra Bogdanovic. Deformable Polyurethane Joints and Fibre Grids for Resilient Seismic Performance of Reinforced Concrete Frames with Orthoblock Brick Infills. Polymers. 2020; 12 (12):2869.
Chicago/Turabian StyleTheodoros Rousakis; Alper Ilki; Arkadiusz Kwiecien; Alberto Viskovic; Matija Gams; Petra Triller; Bahman Ghiassi; Andrea Benedetti; Zoran Rakicevic; Camilla Colla; Omer Faruk Halici; Bogusław Zając; Łukasz Hojdys; Piotr Krajewski; Fabio Rizzo; Vachan Vanian; Anastasios Sapalidis; Efthimia Papadouli; Aleksandra Bogdanovic. 2020. "Deformable Polyurethane Joints and Fibre Grids for Resilient Seismic Performance of Reinforced Concrete Frames with Orthoblock Brick Infills." Polymers 12, no. 12: 2869.
This paper investigates pressure coefficient and peak factor statistics for a hyperbolic paraboloid canopy roof used as a tensile structure to cover a soccer arena. The non-Gaussian properties of the pressure coefficient processes are measured at different roof locations for different wind angles of attack. Peak factor statistics, estimated using pressure coefficient time histories experimentally measured in wind tunnel tests and measured on the bottom and on the top of the roof, are compared with corresponding peak factor statistics estimated through use of four analytical models available in the literature, namely the Davenport, classical Hermite, revised Hermite, and translated-peak-process (TPP) models. It was found that: (1) all analytical models underestimate the mean and standard deviations of the experimental peak factors; (2) the non-Gaussianity region is significantly affected by the position on the roof, i.e., up and down, whereas it is less affected by the wind angle; (3) the two Hermite models provide accurate estimates of peak factor mean and standard deviations.
Fabio Rizzo. Wind Tunnel Pressure Series Statistics for the Case of a Large Span Canopy Roof. Iranian Journal of Science and Technology, Transactions of Civil Engineering 2020, 1 -30.
AMA StyleFabio Rizzo. Wind Tunnel Pressure Series Statistics for the Case of a Large Span Canopy Roof. Iranian Journal of Science and Technology, Transactions of Civil Engineering. 2020; ():1-30.
Chicago/Turabian StyleFabio Rizzo. 2020. "Wind Tunnel Pressure Series Statistics for the Case of a Large Span Canopy Roof." Iranian Journal of Science and Technology, Transactions of Civil Engineering , no. : 1-30.
This paper analyses structural and acoustic performance interactions of a building covered with a cable net and membrane roof following a multiphysics approach. The problem has three different variables: the roof time-depending deformed shape under wind action (duration 1800 s), the extremely variable position of a singer on the stage (30 s speaker recorded movements were expanded through a 6th order Hermite chaos polynomials to cover all the potential acoustic source positions) and finally, the listeners’ location (assumed according to Beranek for a listener located in the middle of the aisle between two stalls). The Initial Time Delay Gap was assumed as a measure of speech or song diffusion. In addition, reverberation time, clarity and early decay time were estimated for both undeformed and deformed roof shapes to evaluate acoustic performance variations. Roof deformation was calculated using time-history nonlinear structural analyses done by applying wind action measured in wind tunnel.
Fabio Rizzo; Paolo Zazzini; Sergio Montelpare; Alessandro Ricciutelli. Investigation of wind induced vibration and acoustic performance interactions for a flexible roof through multiphysics approach. Journal of Building Performance Simulation 2020, 13, 555 -582.
AMA StyleFabio Rizzo, Paolo Zazzini, Sergio Montelpare, Alessandro Ricciutelli. Investigation of wind induced vibration and acoustic performance interactions for a flexible roof through multiphysics approach. Journal of Building Performance Simulation. 2020; 13 (5):555-582.
Chicago/Turabian StyleFabio Rizzo; Paolo Zazzini; Sergio Montelpare; Alessandro Ricciutelli. 2020. "Investigation of wind induced vibration and acoustic performance interactions for a flexible roof through multiphysics approach." Journal of Building Performance Simulation 13, no. 5: 555-582.
The work described in this paper investigated, by calculating critical flutter speed, the aeroelastic response of suspended pedestrian bridges made of a laminated wood structure and hemp cables and compared them to bridges with a steel structure and harmonic steel cables. Critical flutter speed was estimated using a numerical two degree of freedom (2-DOF) generalized deck model based on finite-element modal analysis. The critical flutter speeds of two sets of 25 different structural configurations, obtained by varying the deck chord and the permanent deck loads, made of steel and of laminated wood respectively, were estimated using experimental flutter derivatives obtained from 30 wind tunnel experiments. One of the most significant results was that pedestrian bridges made of laminated wood and hemp have a higher torsional frequency than those made of steel and that this affects critical flutter speed. A case study was performed and discussed by analyzing the structural and aeroelastic response of a 250 m pedestrian bridge with a 12 m deck chord and two approximately 32 m tall towers.
Fabio Rizzo. Aeroelastic Response of Suspended Pedestrian Bridges Made of Laminated Wood and Hemp. Infrastructures 2020, 5, 60 .
AMA StyleFabio Rizzo. Aeroelastic Response of Suspended Pedestrian Bridges Made of Laminated Wood and Hemp. Infrastructures. 2020; 5 (7):60.
Chicago/Turabian StyleFabio Rizzo. 2020. "Aeroelastic Response of Suspended Pedestrian Bridges Made of Laminated Wood and Hemp." Infrastructures 5, no. 7: 60.
The aerodynamics of roofs with a hyperbolic paraboloid shape is almost neglected by codes. However, this shape is commonly used to cover large spans through tensile structures or light shells. Due to their lightness and size, these structures are very sensitive to wind, that may produce very complex pressure distributions. The correlation structure of wind-induced pressure fields plays therefore a relevant role, because it affects the resultant forces to be included in the design of structural elements, at different scales, and this aspect has not yet been fully explored in the scientific literature for this shape. Based on experimental tests performed in the CRIACIV boundary-layer wind-tunnel in Prato (Italy) on in-scale models, this paper investigates, as a part of a wider research, the correlation structure of the pressure field on buildings with a hyperbolic paraboloid roof. Namely, the loss of correlation of the experimental pressure distribution on a sample model is described by evaluating the effective pressure coefficients on regions of increasing size around significant points of the roof, for different angles of incidence of the wind.
Fabio Rizzo; Vincenzo Sepe. Pressure Field Correlation for Buildings with Hyperbolic Paraboloid Roofs: Results of Wind-Tunnel Tests. Recent Advances in Computational Mechanics and Simulations 2020, 977 -988.
AMA StyleFabio Rizzo, Vincenzo Sepe. Pressure Field Correlation for Buildings with Hyperbolic Paraboloid Roofs: Results of Wind-Tunnel Tests. Recent Advances in Computational Mechanics and Simulations. 2020; ():977-988.
Chicago/Turabian StyleFabio Rizzo; Vincenzo Sepe. 2020. "Pressure Field Correlation for Buildings with Hyperbolic Paraboloid Roofs: Results of Wind-Tunnel Tests." Recent Advances in Computational Mechanics and Simulations , no. : 977-988.
This paper discusses the implementation of an artificial neural network (ANN) for predicting the critical flutter velocity of suspension bridges with closed box deck sections. Deck chord length, bridge weight and structural damping were varied. The ANN model was derived and trained using a dataset of critical flutter velocities, calculated using flutter derivatives (FDs) from experiments and by varying geometrical and mechanical parameters. The ANN model was derived by training and comparing two different, preliminary ANNs. The first one was based on thirty sets of experimental FDs. This first set was subsequently used to calibrate the second model, based on surrogate FDs obtained by curve fitting of the experimental data. The surrogate FD dataset was subsequently expanded by Nataf-model Monte Carlo (MC) and Polynomial Chaos Expansion (PCE)-model MC simulation. Finally, the ANN was employed to synthetically generate a larger dataset of critical flutter velocities and estimate the corresponding probability distribution.
Fabio Rizzo; Luca Caracoglia. Artificial Neural Network model to predict the flutter velocity of suspension bridges. Computers & Structures 2020, 233, 106236 .
AMA StyleFabio Rizzo, Luca Caracoglia. Artificial Neural Network model to predict the flutter velocity of suspension bridges. Computers & Structures. 2020; 233 ():106236.
Chicago/Turabian StyleFabio Rizzo; Luca Caracoglia. 2020. "Artificial Neural Network model to predict the flutter velocity of suspension bridges." Computers & Structures 233, no. : 106236.
The paper discusses the computational fluid dynamics simulation results of a bluff body. A literature case regarding a closed box section of a suspended bridge was selected since it is of practical relevance. An OpenFOAM implementation of a Spalart–Allmaras local correlation based transition model for Reynolds Averaged Navier–Stokes (RANS) equations was used as flow model. Locally-formulated RANS transition models were coupled with the Spalart–Allmaras (SA) model to reduce the computational cost with respect to the SST k − ω model. This model, named γ−Rθ,t˜-SA, was successfully applied on airfoil sections and results are given by literature. In this paper, we present a set of computations of the flow field around a bluff body in order to stress the need to take into account transition effects in these kind of applications. The measure of the proposed model reliability was attested comparing experimental pressure coefficients and aerodynamic forces on the bridge section; besides, the effects of the model predictions on the critical flutter velocity, estimated by FEM and 2DOF Scanlan model of a pedestrian bridge structure, was examined as case of study.
F. Rizzo; V. D'Alessandro; Sergio Montelpare; L. Giammichele. Computational study of a bluff body aerodynamics: Impact of the laminar-to-turbulent transition modelling. International Journal of Mechanical Sciences 2020, 178, 105620 .
AMA StyleF. Rizzo, V. D'Alessandro, Sergio Montelpare, L. Giammichele. Computational study of a bluff body aerodynamics: Impact of the laminar-to-turbulent transition modelling. International Journal of Mechanical Sciences. 2020; 178 ():105620.
Chicago/Turabian StyleF. Rizzo; V. D'Alessandro; Sergio Montelpare; L. Giammichele. 2020. "Computational study of a bluff body aerodynamics: Impact of the laminar-to-turbulent transition modelling." International Journal of Mechanical Sciences 178, no. : 105620.
This paper presents a method to predict the uncertainty associated with dynamic identification of a reduced-scale model of a building structure from laboratory experiments. Systematic repetitions of dynamic identification experiments and their results were expanded through Hermite Polynomial chaos. The study describes the degree of uncertainty related to structural engineering properties of the model due to laboratory errors. Uncertainties in the physical experimental system should be adequately modelled to obtain an accurate estimate of structural safety. This is crucial to reduce prediction errors of full-scale structural performance. The method works using reliability-based optimization. Applicability of the framework is illustrated using a reduced-scale model of a high-rise building, constructed for multi-hazard dynamic experiments on a shaking table and in a wind tunnel. The still-air dynamic identification of model parameters closely affects the wind tunnel results. The method accounts for system variability and experimental error propagation, enabling evaluation of structural reliability for the corresponding full-scale structure. Results reveal that the variability introduced by laboratory errors propagates onto the estimation of structural frequencies and damping, leading to non-negligible variation of full-scale structural parameters. The corresponding probability density function of some relevant-mode full-scale vibration magnitudes is discussed as a compelling example for structural safety. The study demonstrates that experimental variability must be taken into account, particularly in the case of aeroelastic wind tunnel models, because structural response measurements are affected by this uncertainty.
F. Rizzo; F. Ricciardelli; G. Maddaloni; Antonio Bonati; A. Occhiuzzi. Experimental error analysis of dynamic properties for a reduced-scale high-rise building model and implications on full-scale behaviour. Journal of Building Engineering 2019, 28, 101067 .
AMA StyleF. Rizzo, F. Ricciardelli, G. Maddaloni, Antonio Bonati, A. Occhiuzzi. Experimental error analysis of dynamic properties for a reduced-scale high-rise building model and implications on full-scale behaviour. Journal of Building Engineering. 2019; 28 ():101067.
Chicago/Turabian StyleF. Rizzo; F. Ricciardelli; G. Maddaloni; Antonio Bonati; A. Occhiuzzi. 2019. "Experimental error analysis of dynamic properties for a reduced-scale high-rise building model and implications on full-scale behaviour." Journal of Building Engineering 28, no. : 101067.
The paper investigates experimental error propagation and its effects on critical flutter speeds of pedestrian suspension bridges using three different experimental data sets: pressure coefficients, aerodynamic static forces and flutter derivatives. The three data sets are obtained from section model measurements in three distinct laboratories. Data sets are used to study three different geometries of pedestrian suspension bridges. Critical flutter speed is estimated using finite-element nonlinear analysis, numerical 2-DOF generalized deck model and 3-DOF full-bridge model. Flutter probability, contaminated by various experimental error sources, is examined. Experimental data sets are synthetically expanded to obtain two population sets of deck wind loads with 30 and 5 · 105 realizations, respectively. The first set is obtained using Monte-Carlo simulation approach, whereas the second one is determined using Polynomial chaos expansion theory and a basis of Hermite polynomials. The numerically-determined probability density functions are compared against empirical probability histograms (pdfs) by Kolmogorov-Smirnov tests.
Fabio Rizzo; Luca Caracoglia; Sergio Montelpare. Predicting the flutter speed of a pedestrian suspension bridge through examination of laboratory experimental errors. Engineering Structures 2018, 172, 589 -613.
AMA StyleFabio Rizzo, Luca Caracoglia, Sergio Montelpare. Predicting the flutter speed of a pedestrian suspension bridge through examination of laboratory experimental errors. Engineering Structures. 2018; 172 ():589-613.
Chicago/Turabian StyleFabio Rizzo; Luca Caracoglia; Sergio Montelpare. 2018. "Predicting the flutter speed of a pedestrian suspension bridge through examination of laboratory experimental errors." Engineering Structures 172, no. : 589-613.
This paper investigates the statistics of the pressure coefficients and their peak factors in hyperbolic paraboloid roofs that are commonly used in tensile structures. The experimental peak factor statistics, estimated using pressure coefficient time histories experimentally measured in wind tunnel tests, were compared with the corresponding peak factor statistics estimated through the use of six analytical models available in the literature, namely the Davenport, classical Hermite, revised Hermite, modified Hermite, Translated-Peak-Process (TPP), and Liu’s models. The basic assumption of the TPP model, i.e., that the pressure coefficient local peaks follow a Weibull distribution, was validated and was used to estimate analytically the peak factors’ quantiles. Different time history durations and different error measures were also considered. The non-Gaussian properties of the pressure coefficient processes were characterized at different roof locations for different wind angles of attack. It was found that: (1) the region of non-Gaussianity is significantly affected by the wind angle; (2) as expected, the Davenport model underestimates the peak factor mean and standard deviation in regions of high non-Gaussianity; (3) the modified Hermite model provides the best estimates overall of the peak factor mean; and (4) the TPP model provides the best estimates overall of the peak factor standard deviation. In addition, the modified root mean squared error was found to provide the most reliable assessment of the analytical models’ accuracy among the different error measures considered in this study.
Fabio Rizzo; Michele Barbato; Vincenzo Sepe. Peak factor statistics of wind effects for hyperbolic paraboloid roofs. Engineering Structures 2018, 173, 313 -330.
AMA StyleFabio Rizzo, Michele Barbato, Vincenzo Sepe. Peak factor statistics of wind effects for hyperbolic paraboloid roofs. Engineering Structures. 2018; 173 ():313-330.
Chicago/Turabian StyleFabio Rizzo; Michele Barbato; Vincenzo Sepe. 2018. "Peak factor statistics of wind effects for hyperbolic paraboloid roofs." Engineering Structures 173, no. : 313-330.
In the original article, the reference Rizzo and Ricciardelli (2017) was incorrectly published. The invalid reference and the corrected reference are given.
Fabio Rizzo; Paolo Zazzini. Correction to: Shape Dependence of Acoustic Performances of Buildings with a Hyperbolic Paraboloid Cable Net Membrane Roof. Acoustics Australia 2017, 45, 539 -539.
AMA StyleFabio Rizzo, Paolo Zazzini. Correction to: Shape Dependence of Acoustic Performances of Buildings with a Hyperbolic Paraboloid Cable Net Membrane Roof. Acoustics Australia. 2017; 45 (3):539-539.
Chicago/Turabian StyleFabio Rizzo; Paolo Zazzini. 2017. "Correction to: Shape Dependence of Acoustic Performances of Buildings with a Hyperbolic Paraboloid Cable Net Membrane Roof." Acoustics Australia 45, no. 3: 539-539.
The paper investigates the shape dependence of the acoustic performances of space with different plans covered by a hyperbolic paraboloid cables net and membrane roof. In addition, the paper study the differences of acoustic performances between four different configurations: sport arena and empty, partially occupied and full concert hall. The aim is to compare the shape dependence of the acoustic response for each configuration. The study is focused on different geometries: four different plan shapes (i.e., square, circular, rectangular and elliptical) and two different curvatures. The differences of acoustic efficiency are compared using some representative parameters like the reverberation time, (\(T_{30}\)), the clarity (\(C_{80}\)), the definition (\(D_{50}\)) and the initial time delay gap. In addition, the paper compares the acoustic response for all concert hall configurations and all geometries with permanent and temporary improvements.
Fabio Rizzo; Paolo Zazzini. Shape Dependence of Acoustic Performances of Buildings with a Hyperbolic Paraboloid Cable Net Membrane Roof. Acoustics Australia 2017, 45, 421 -443.
AMA StyleFabio Rizzo, Paolo Zazzini. Shape Dependence of Acoustic Performances of Buildings with a Hyperbolic Paraboloid Cable Net Membrane Roof. Acoustics Australia. 2017; 45 (2):421-443.
Chicago/Turabian StyleFabio Rizzo; Paolo Zazzini. 2017. "Shape Dependence of Acoustic Performances of Buildings with a Hyperbolic Paraboloid Cable Net Membrane Roof." Acoustics Australia 45, no. 2: 421-443.
Fabio Rizzo; Vincenzo Sepe. Static loads to simulate dynamic effects of wind on hyperbolic paraboloid roofs with square plan. Journal of Wind Engineering and Industrial Aerodynamics 2015, 137, 46 -57.
AMA StyleFabio Rizzo, Vincenzo Sepe. Static loads to simulate dynamic effects of wind on hyperbolic paraboloid roofs with square plan. Journal of Wind Engineering and Industrial Aerodynamics. 2015; 137 ():46-57.
Chicago/Turabian StyleFabio Rizzo; Vincenzo Sepe. 2015. "Static loads to simulate dynamic effects of wind on hyperbolic paraboloid roofs with square plan." Journal of Wind Engineering and Industrial Aerodynamics 137, no. : 46-57.