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Salvatore Noè

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Papers by Salvatore Noè

Role of In-Field Experimental Diagnostic Analysis for the Derivation of Residual Capacity Indexes in Existing Pedestrian Glass Systems

Buildings

The use of simplified tools in support of the mechanical performance assessment of pedestrian str... more The use of simplified tools in support of the mechanical performance assessment of pedestrian structures is strongly attractive for designers due to practical efficiency, as well as for researchers in terms of innovation and the assessment of new proposals. On the side of design, the vibration serviceability requires that specific comfort levels for pedestrians are satisfied by taking into account conventional performance indicators and the class of use, or the structural typology for pedestrian systems’ object of analysis. A major issue, in this context, is represented by long-term performance of systems (especially pedestrian) that are based on innovative or sensitive materials and possibly affected by degradation or even damage, and thus potentially unsafe. Consequently, it is clear that, especially for in-service structures, the availability of standardized non-destructive protocols for a reliable (and possibly rapid) structural assessment can represent an efficient support for ...

Scenari di pericolosità sismica e di danno per la città di Gorizia

Body Motion Sensor Analysis of Human-Induced Dynamic Load Factor (DLF) for Normal Walks on Slender Transparent Floors

Journal of Sensor and Actuator Networks

Modern constructions are often characterized by the presence of slender and aesthetically fascina... more Modern constructions are often characterized by the presence of slender and aesthetically fascinating components and assemblies. For pedestrian systems in particular, such constructions are notoriously associated with possible vibration issues, and thus require special calculations. When these slender systems are made of structural glass, additional effects due to transparency may also affect human behaviours and motions. In this paper, based on a single body motion, a microelectromechanical system (MEMS) sensor in the body’s centre of mass (CoM) is introduced, an extended, original experimental investigation is presented, and human-induced effects on slender transparent floors are discussed. Major attention is given to the well-known dynamic load factor (DLF) induced by a single pedestrian’s normal walk; a fixed walking rate is assigned, and different substructures (with major variations in their structural dynamic parameters) are taken into account. A discussion of experimental re...

Innovative Configurations for Long-Span Suspension Bridges

This paper reports the results of a piece of research about long-span suspension bridges with mul... more This paper reports the results of a piece of research about long-span suspension bridges with multiple-box girder steel deck characterized by low drag coefficient and high aeroelastic stability. For this type of bridges, by increasing the span length, the contribution to the stiffness of the suspension cables becomes dominant with respect to that of the deck, so that the ratio of the frequency of the first torsional mode to the frequency of the first vertical bending mode approaches unity, while they both decrease. As a consequence, if the deck cross-section geometry does not allow single-degree-of-freedom torsional flutter, one would observe the onset of two-degree-of-freedom classical flutter at a relatively low wind speed, depending on the dynamic and aerodynamic properties of the structure. The research presented herein, proposes an innovative approach to the design of long-span suspension bridges by studying deck configurations with frequency ratios of first torsional to vertic...

Theoretical and numerical evaluation of the turbulence effects on the aeroelastic stability of long span bridges

Applicability of DAD methodology for low-rise buildings to European and Italian wind load standards

In the last decade the DAD (Database-Assisted Design) method has been developed as a reliable cal... more In the last decade the DAD (Database-Assisted Design) method has been developed as a reliable calculation procedure to estimate structural wind loads and the design of low-rise, industrial buildings. This approach has been introduced as an alternative to prescriptive design standards. As ASCE7-16 already contemplates the use of DAD (Sec. C31.4.2), application of this method could also be extended to European and Italian standards, resulting in an effective tool for structural design against high wind loads. In this work, maximum bending moments are compared at selected cross sections of steel portal frames of five industrial buildings, calculated using both DAD, European (Eurocode 1, "EC1"), Italian (NTC18 & CNR-DT 207/2008 or "CNR") and American (ASCE 7-16) provisions. The comparisons indicate that the moment magnitudes, estimated through the standards, are similar and conservative compared to DAD results when the building is located into an "open country" exposure scenario. However, the DAD method better reproduces turbulence effects on the variation of the pressure coefficients when a suburban terrain is considered.

Rapid Safety Assement and Experimental Derivation of Damage Indexes for In-Service Glass Slabs

Challenging Glass Conference Proceedings

The mechanical performance of pedestrian structures attracts the attention of several studies, es... more The mechanical performance of pedestrian structures attracts the attention of several studies, especially with respect to unfavourable operational conditions or possible damage scenarios. In terms of vibrations, for example, specific customer comfort levels must be satisfied, depending on the class of use, the structural typology, the involved materials, in addition to basic safety requirements. A special consideration should be given to in-service systems that are possibly affected by degradation or even damage, and thus potentially unsafe for pedestrians. In this regard, the availability of standardized non-destructive protocols for a reliable and rapid structural safety assessment may result in efficient support for diagnostic analyses. In this paper, 3 different laminated glass (LG) modular units belonging to 2 different indoor in-service pedestrian systems located in Italy are investigated. Operational Modal Analysis (OMA) procedures and dynamic identification techniques are us...

Analytical Pushover Curves for X-Concentric Braced Steel Frames

Buildings, Mar 29, 2022

This article is an open access article distributed under the terms and conditions of the Creative... more

Design of X-Concentric Braced Steel Frame Systems Using an Equivalent Stiffness in a Modal Elastic Analysis

Buildings, 2022

In this work, a general method for the design of concentric braced steel frames (CBF) with active... more In this work, a general method for the design of concentric braced steel frames (CBF) with active tension diagonal bracings, applicable to single- and multi-storey structures, is presented. The method is based on the use of an elastic modal analysis with a response spectrum, which is carried out using an appropriate modified elastic stiffness of diagonal bracings. The reliability of the proposed method is validated through the analysis of significant case studies, making a series of numerical comparisons carrying out time-history non-linear dynamic analysis.

Uncoupled Wi-Fi Body CoM Acceleration for the Analysis of Lightweight Glass Slabs under Random Walks

Journal of Sensor and Actuator Networks, 2022

The vibration serviceability assessment of slender and/or lightweight pedestrian systems with hig... more The vibration serviceability assessment of slender and/or lightweight pedestrian systems with high sensitivity to walk-induced effects is rather challenging. In the same way, laminated glass (LG) is used in buildings for structural applications but still represents a not well known and vulnerable material. For pedestrian LG systems, the characterization of dynamic and mechanical parameters may require specific procedures which do not adapt from other constructional typologies. Among others, the mass of pedestrians is generally high compared with LG structural components. Size and restraints in LG may also lead to more pronounced vibration effects. For existing LG systems, moreover, knowledge of residual capacity may be rather difficult. In this paper, an original uncoupled experimental investigation is proposed to numerically address the accuracy and potential of low-cost laboratory body measures for vibration analysis of LG slabs to support (or even replace) field tests or more com...

Experimental analysis of semi-rigid composite frames

PR Composite Joints Under Cyclic and Dynamic Loading Conditions: A Component Modeling Approach

This paper presents a mechanical model suitable for the simulation of partially restrained (PR) c... more This paper presents a mechanical model suitable for the simulation of partially restrained (PR) connections subjected to monotonic and cyclic loads. The model is capable of simulating the behavior of a PR composite joint subjected to a generic load history, taking in account the influence of all the main components, including slip of the bolts, shear deformation of the panel zone and cracking in the slab. The model is also capable of determining the amount of energy dissipated by local plasticification in the various components, and thus allows an evaluation of their relative importance in the post-elastic behavior of the connection. For validation of the model, comparisons to the results of several experiments are discussed. These results show that the model is capable of tracking the main behavioral aspects observed in the tests, and provides very good quantitative fit to the experimental results.

Modellazione in campo non lineare delle strutture composte intelaiate acciaio-calcestruzzo in zona sismica. Parte 1: Il giunto composto

La progettazione in zona sismica di una struttura intelaiata composta risulta molto più com-pless... more La progettazione in zona sismica di una struttura intelaiata composta risulta molto più com-plessa di quella di una struttura in solo acciaio a causa della presenza della soletta, della sua in-terazione nella zona di plasticizzazione della trave e della complessità del nodo. Nel presente lavoro, suddiviso in due parti, si presentano le problematiche relative sia alla modellazione del nodo che del telaio composto qualora si effettui una analisi non lineare di pushover. In questa prima parte, si affronta il problema relativo alla progettazione e modellazione del giunto composto mediante il metodo per componenti, così come recepito dagli Eurocodici 3, 4 ed 8. In particolare, vengono dapprima analizzati e approfonditi i meccanismi resistenti sia per un nodo saldato che flangiato a completo ripristino di resistenza, focalizzando l’attenzione sul-la progettazione della soletta in calcestruzzo e sui meccanismi tirante-puntone in corrisponden-za della zona nodale. Successivamente viene affr...

Experimental Investigation on the Behavior of Spandrels in Ancient Masonry Buildings

The paper presents the main outcomes of experimental tests carried out to analyze the structural ... more The paper presents the main outcomes of experimental tests carried out to analyze the structural behaviour of masonry spandrels. They play a significant role in masonry walls of ancient buildings, as they guarantee an effective coupling between adjacent masonry piers so as to assure high in-plane strength and stiffness for the walls. The main aim of the research is to point out the actual response of such structural components under seismic loads. Two spandrels with different lintels are considered in the study, they have been subjected to a controlled vertical displacement history so as to simulate their response under seismic actions. Moreover the effect of a strengthening intervention for spandrels that consider the coupling between the masonry beams and steel ties has been pointed out. The results achieved make up for the lack of experimental data on the behaviour of these structural elements and constitute a valid reference to calibrate nonlinear numerical models for the assess...

Interpretation of the Experimental Behavior of Two Semi-Rigid Composite Frames by Means of a By-Component Mechanical Model

Composite Construction in Steel and Concrete V, 2006

Possibly, the most complicated and time-consuming task in experimental research is represented by... more Possibly, the most complicated and time-consuming task in experimental research is represented by the phase of data interpretation, especially for what concerns the relationship between the local data and the overall experimental behavior of the structures. One of the advantages in adopting the by-component modeling approach for the analysis and simulation of composite connections in structures is that it is possible to closely simulate the local behavior of a number of connecting members, and to put it directly in a relationship with the overall simulated behavior, thus highlighting patterns and providing explanations, which might not have been immediately discernible just by examining the recorded data separately. The paper discusses an experimental test involving two one-story, two-bay steel-concrete composite frames with partially-restrained connections, subjected to a series of loading/unloading cycles up to failure. The experimental data is interpreted by means of a mechanical model of the connections, specifically developed for the task at hand. The analysis of the structural behavior by means of the proposed modeling approach allows to closely relate the experimentally observed phenomena to the local behavior of single components, such as the connecting elements, the steel-concrete interface, the column web panel, etc, with an accuracy that would not else be possible. The by-component modeling approach demonstrates to be a very useful tool in data interpretation, especially for the case of partially-restrained connections, the behavior of which is generally very difficult to assess.

Component Modeling of Partially Restrained Composite Joints under Cyclic and Dynamic Loading

Journal of Structural Engineering, 2004

... this paper extends the component approach to the prediction of the cyclic nonlinear response ... more

Vortex induced vibration of reinforced concrete chimneys: in situ experimentation and numerical previsions

Journal of Wind Engineering and Industrial Aerodynamics, 1998

The paper presents the main aspects of a numerical model aimed at evaluating the response of cyli... more The paper presents the main aspects of a numerical model aimed at evaluating the response of cylindrical structures subjected to vortex shedding excitation. The model can asses displacement amplitude and stresses for wind velocities lower than/equal to/greater than the critical wind speed. In the lock-in range it can simulate the displacement limitation due both to damping or to aeroelastic force equilibrium.

Commissioning and Initial Operations of FERMI@Elettra

This article describes the design goals of FERMI@Elettra, reports on the goals achieved so far an... more This article describes the design goals of FERMI@Elettra, reports on the goals achieved so far and shows how the facility development has been driven by the new research frontier of ultra-fast, extreme ultra-violet and soft X-ray science. The commissioning phases and first experience with user pilot experiments are presented and discussed.

High Frequency GNSS Measurements for Structural Monitoring Applications

Dynamic deformation monitoring of structures such as long bridges, towers, and tall buildings, fo... more

A Possible Revision of the Current Seismic Design Process

We present a possible Performance Based Seismic Design (PBSD) process grounded in a scenario base... more We present a possible Performance Based Seismic Design (PBSD) process grounded in a scenario based definition of the seismic input. The proposed procedure aims to address the following considerations, arisen from the analysis of seismic phenomena: a) any structure at a given location, regardless of its importance, is subject to the same shaking as a result of a given earthquake, b) it is impossible to determine with precision when a future earthquake of a given intensity/magnitude will occur, c) insufficient data are available to develop reliable statistics for earthquakes. Following these considerations, the seismic input at a given site determined on the basis of the seismic history and the seismogenic zones, nodes and faults is defined using the Neo Deterministic Seismic Hazard Assessment. Two different analyses are carried out at different levels of detail. The first one (Regional Scale Analysis) provides the “Maximum Deterministic Seismic Input” as a response spectrum at the be...

Role of In-Field Experimental Diagnostic Analysis for the Derivation of Residual Capacity Indexes in Existing Pedestrian Glass Systems

Buildings

The use of simplified tools in support of the mechanical performance assessment of pedestrian str... more The use of simplified tools in support of the mechanical performance assessment of pedestrian structures is strongly attractive for designers due to practical efficiency, as well as for researchers in terms of innovation and the assessment of new proposals. On the side of design, the vibration serviceability requires that specific comfort levels for pedestrians are satisfied by taking into account conventional performance indicators and the class of use, or the structural typology for pedestrian systems’ object of analysis. A major issue, in this context, is represented by long-term performance of systems (especially pedestrian) that are based on innovative or sensitive materials and possibly affected by degradation or even damage, and thus potentially unsafe. Consequently, it is clear that, especially for in-service structures, the availability of standardized non-destructive protocols for a reliable (and possibly rapid) structural assessment can represent an efficient support for ...

Scenari di pericolosità sismica e di danno per la città di Gorizia

Body Motion Sensor Analysis of Human-Induced Dynamic Load Factor (DLF) for Normal Walks on Slender Transparent Floors

Journal of Sensor and Actuator Networks

Modern constructions are often characterized by the presence of slender and aesthetically fascina... more Modern constructions are often characterized by the presence of slender and aesthetically fascinating components and assemblies. For pedestrian systems in particular, such constructions are notoriously associated with possible vibration issues, and thus require special calculations. When these slender systems are made of structural glass, additional effects due to transparency may also affect human behaviours and motions. In this paper, based on a single body motion, a microelectromechanical system (MEMS) sensor in the body’s centre of mass (CoM) is introduced, an extended, original experimental investigation is presented, and human-induced effects on slender transparent floors are discussed. Major attention is given to the well-known dynamic load factor (DLF) induced by a single pedestrian’s normal walk; a fixed walking rate is assigned, and different substructures (with major variations in their structural dynamic parameters) are taken into account. A discussion of experimental re...

Innovative Configurations for Long-Span Suspension Bridges

This paper reports the results of a piece of research about long-span suspension bridges with mul... more This paper reports the results of a piece of research about long-span suspension bridges with multiple-box girder steel deck characterized by low drag coefficient and high aeroelastic stability. For this type of bridges, by increasing the span length, the contribution to the stiffness of the suspension cables becomes dominant with respect to that of the deck, so that the ratio of the frequency of the first torsional mode to the frequency of the first vertical bending mode approaches unity, while they both decrease. As a consequence, if the deck cross-section geometry does not allow single-degree-of-freedom torsional flutter, one would observe the onset of two-degree-of-freedom classical flutter at a relatively low wind speed, depending on the dynamic and aerodynamic properties of the structure. The research presented herein, proposes an innovative approach to the design of long-span suspension bridges by studying deck configurations with frequency ratios of first torsional to vertic...

Theoretical and numerical evaluation of the turbulence effects on the aeroelastic stability of long span bridges

Applicability of DAD methodology for low-rise buildings to European and Italian wind load standards

In the last decade the DAD (Database-Assisted Design) method has been developed as a reliable cal... more In the last decade the DAD (Database-Assisted Design) method has been developed as a reliable calculation procedure to estimate structural wind loads and the design of low-rise, industrial buildings. This approach has been introduced as an alternative to prescriptive design standards. As ASCE7-16 already contemplates the use of DAD (Sec. C31.4.2), application of this method could also be extended to European and Italian standards, resulting in an effective tool for structural design against high wind loads. In this work, maximum bending moments are compared at selected cross sections of steel portal frames of five industrial buildings, calculated using both DAD, European (Eurocode 1, "EC1"), Italian (NTC18 & CNR-DT 207/2008 or "CNR") and American (ASCE 7-16) provisions. The comparisons indicate that the moment magnitudes, estimated through the standards, are similar and conservative compared to DAD results when the building is located into an "open country" exposure scenario. However, the DAD method better reproduces turbulence effects on the variation of the pressure coefficients when a suburban terrain is considered.

Rapid Safety Assement and Experimental Derivation of Damage Indexes for In-Service Glass Slabs

Challenging Glass Conference Proceedings

The mechanical performance of pedestrian structures attracts the attention of several studies, es... more The mechanical performance of pedestrian structures attracts the attention of several studies, especially with respect to unfavourable operational conditions or possible damage scenarios. In terms of vibrations, for example, specific customer comfort levels must be satisfied, depending on the class of use, the structural typology, the involved materials, in addition to basic safety requirements. A special consideration should be given to in-service systems that are possibly affected by degradation or even damage, and thus potentially unsafe for pedestrians. In this regard, the availability of standardized non-destructive protocols for a reliable and rapid structural safety assessment may result in efficient support for diagnostic analyses. In this paper, 3 different laminated glass (LG) modular units belonging to 2 different indoor in-service pedestrian systems located in Italy are investigated. Operational Modal Analysis (OMA) procedures and dynamic identification techniques are us...

Analytical Pushover Curves for X-Concentric Braced Steel Frames

Buildings, Mar 29, 2022

This article is an open access article distributed under the terms and conditions of the Creative... more

Design of X-Concentric Braced Steel Frame Systems Using an Equivalent Stiffness in a Modal Elastic Analysis

Buildings, 2022

In this work, a general method for the design of concentric braced steel frames (CBF) with active... more In this work, a general method for the design of concentric braced steel frames (CBF) with active tension diagonal bracings, applicable to single- and multi-storey structures, is presented. The method is based on the use of an elastic modal analysis with a response spectrum, which is carried out using an appropriate modified elastic stiffness of diagonal bracings. The reliability of the proposed method is validated through the analysis of significant case studies, making a series of numerical comparisons carrying out time-history non-linear dynamic analysis.

Uncoupled Wi-Fi Body CoM Acceleration for the Analysis of Lightweight Glass Slabs under Random Walks

Journal of Sensor and Actuator Networks, 2022

The vibration serviceability assessment of slender and/or lightweight pedestrian systems with hig... more The vibration serviceability assessment of slender and/or lightweight pedestrian systems with high sensitivity to walk-induced effects is rather challenging. In the same way, laminated glass (LG) is used in buildings for structural applications but still represents a not well known and vulnerable material. For pedestrian LG systems, the characterization of dynamic and mechanical parameters may require specific procedures which do not adapt from other constructional typologies. Among others, the mass of pedestrians is generally high compared with LG structural components. Size and restraints in LG may also lead to more pronounced vibration effects. For existing LG systems, moreover, knowledge of residual capacity may be rather difficult. In this paper, an original uncoupled experimental investigation is proposed to numerically address the accuracy and potential of low-cost laboratory body measures for vibration analysis of LG slabs to support (or even replace) field tests or more com...

Experimental analysis of semi-rigid composite frames

PR Composite Joints Under Cyclic and Dynamic Loading Conditions: A Component Modeling Approach

This paper presents a mechanical model suitable for the simulation of partially restrained (PR) c... more This paper presents a mechanical model suitable for the simulation of partially restrained (PR) connections subjected to monotonic and cyclic loads. The model is capable of simulating the behavior of a PR composite joint subjected to a generic load history, taking in account the influence of all the main components, including slip of the bolts, shear deformation of the panel zone and cracking in the slab. The model is also capable of determining the amount of energy dissipated by local plasticification in the various components, and thus allows an evaluation of their relative importance in the post-elastic behavior of the connection. For validation of the model, comparisons to the results of several experiments are discussed. These results show that the model is capable of tracking the main behavioral aspects observed in the tests, and provides very good quantitative fit to the experimental results.

Modellazione in campo non lineare delle strutture composte intelaiate acciaio-calcestruzzo in zona sismica. Parte 1: Il giunto composto

La progettazione in zona sismica di una struttura intelaiata composta risulta molto più com-pless... more La progettazione in zona sismica di una struttura intelaiata composta risulta molto più com-plessa di quella di una struttura in solo acciaio a causa della presenza della soletta, della sua in-terazione nella zona di plasticizzazione della trave e della complessità del nodo. Nel presente lavoro, suddiviso in due parti, si presentano le problematiche relative sia alla modellazione del nodo che del telaio composto qualora si effettui una analisi non lineare di pushover. In questa prima parte, si affronta il problema relativo alla progettazione e modellazione del giunto composto mediante il metodo per componenti, così come recepito dagli Eurocodici 3, 4 ed 8. In particolare, vengono dapprima analizzati e approfonditi i meccanismi resistenti sia per un nodo saldato che flangiato a completo ripristino di resistenza, focalizzando l’attenzione sul-la progettazione della soletta in calcestruzzo e sui meccanismi tirante-puntone in corrisponden-za della zona nodale. Successivamente viene affr...

Experimental Investigation on the Behavior of Spandrels in Ancient Masonry Buildings

The paper presents the main outcomes of experimental tests carried out to analyze the structural ... more The paper presents the main outcomes of experimental tests carried out to analyze the structural behaviour of masonry spandrels. They play a significant role in masonry walls of ancient buildings, as they guarantee an effective coupling between adjacent masonry piers so as to assure high in-plane strength and stiffness for the walls. The main aim of the research is to point out the actual response of such structural components under seismic loads. Two spandrels with different lintels are considered in the study, they have been subjected to a controlled vertical displacement history so as to simulate their response under seismic actions. Moreover the effect of a strengthening intervention for spandrels that consider the coupling between the masonry beams and steel ties has been pointed out. The results achieved make up for the lack of experimental data on the behaviour of these structural elements and constitute a valid reference to calibrate nonlinear numerical models for the assess...

Interpretation of the Experimental Behavior of Two Semi-Rigid Composite Frames by Means of a By-Component Mechanical Model

Composite Construction in Steel and Concrete V, 2006

Possibly, the most complicated and time-consuming task in experimental research is represented by... more Possibly, the most complicated and time-consuming task in experimental research is represented by the phase of data interpretation, especially for what concerns the relationship between the local data and the overall experimental behavior of the structures. One of the advantages in adopting the by-component modeling approach for the analysis and simulation of composite connections in structures is that it is possible to closely simulate the local behavior of a number of connecting members, and to put it directly in a relationship with the overall simulated behavior, thus highlighting patterns and providing explanations, which might not have been immediately discernible just by examining the recorded data separately. The paper discusses an experimental test involving two one-story, two-bay steel-concrete composite frames with partially-restrained connections, subjected to a series of loading/unloading cycles up to failure. The experimental data is interpreted by means of a mechanical model of the connections, specifically developed for the task at hand. The analysis of the structural behavior by means of the proposed modeling approach allows to closely relate the experimentally observed phenomena to the local behavior of single components, such as the connecting elements, the steel-concrete interface, the column web panel, etc, with an accuracy that would not else be possible. The by-component modeling approach demonstrates to be a very useful tool in data interpretation, especially for the case of partially-restrained connections, the behavior of which is generally very difficult to assess.

Component Modeling of Partially Restrained Composite Joints under Cyclic and Dynamic Loading

Journal of Structural Engineering, 2004

... this paper extends the component approach to the prediction of the cyclic nonlinear response ... more

Vortex induced vibration of reinforced concrete chimneys: in situ experimentation and numerical previsions

Journal of Wind Engineering and Industrial Aerodynamics, 1998

The paper presents the main aspects of a numerical model aimed at evaluating the response of cyli... more The paper presents the main aspects of a numerical model aimed at evaluating the response of cylindrical structures subjected to vortex shedding excitation. The model can asses displacement amplitude and stresses for wind velocities lower than/equal to/greater than the critical wind speed. In the lock-in range it can simulate the displacement limitation due both to damping or to aeroelastic force equilibrium.

Commissioning and Initial Operations of FERMI@Elettra

This article describes the design goals of FERMI@Elettra, reports on the goals achieved so far an... more This article describes the design goals of FERMI@Elettra, reports on the goals achieved so far and shows how the facility development has been driven by the new research frontier of ultra-fast, extreme ultra-violet and soft X-ray science. The commissioning phases and first experience with user pilot experiments are presented and discussed.

High Frequency GNSS Measurements for Structural Monitoring Applications

Dynamic deformation monitoring of structures such as long bridges, towers, and tall buildings, fo... more

A Possible Revision of the Current Seismic Design Process

We present a possible Performance Based Seismic Design (PBSD) process grounded in a scenario base... more We present a possible Performance Based Seismic Design (PBSD) process grounded in a scenario based definition of the seismic input. The proposed procedure aims to address the following considerations, arisen from the analysis of seismic phenomena: a) any structure at a given location, regardless of its importance, is subject to the same shaking as a result of a given earthquake, b) it is impossible to determine with precision when a future earthquake of a given intensity/magnitude will occur, c) insufficient data are available to develop reliable statistics for earthquakes. Following these considerations, the seismic input at a given site determined on the basis of the seismic history and the seismogenic zones, nodes and faults is defined using the Neo Deterministic Seismic Hazard Assessment. Two different analyses are carried out at different levels of detail. The first one (Regional Scale Analysis) provides the “Maximum Deterministic Seismic Input” as a response spectrum at the be...