Sebastiano Marasco | Politecnico di Torino (original) (raw)
Papers by Sebastiano Marasco
Geotechnical, Geological and Earthquake Engineering, 2018
Geotechnical, Geological and Earthquake Engineering, 2018
Geotechnical, Geological and Earthquake Engineering, 2018
Geotechnical, Geological and Earthquake Engineering, 2018
Geotechnical, Geological and Earthquake Engineering, 2018
Geotechnical, Geological and Earthquake Engineering, 2018
Geotechnical, Geological and Earthquake Engineering, 2018
International Journal of Disaster Risk Reduction
Introduction to Dynamics of Structures and Earthquake Engineering
This chapters describes the general procedure used to model a 3D frame using SAP2000. A ten-store... more This chapters describes the general procedure used to model a 3D frame using SAP2000. A ten-storey reinforced concrete building is assumed as case study. Four types of methods of analysis are analyzed for the case study building.
Introduction to Dynamics of Structures and Earthquake Engineering
The chapter analyzes different methods of solution of the equation of motion. The equation of mot... more The chapter analyzes different methods of solution of the equation of motion. The equation of motion for a forced SDOF system can be solved in closed form if the external excitation can be expressed as a harmonic function (analytical solution). Moreover, the dynamic response of a system subjected to a generic excitation can be evaluated using other approaches based on the decomposition of the irregular external force (Fourier series or Duhamel integral application). In these cases, the solution is achieved by the superposition property, so that they can be applied for a linear system. Clearly, this represents a limit to of the dynamic response of a real system in which the applied excitation causes irreversible deformation. In order to bypass the intrinsic limit of the previously proposed solution approaches, numerical methods are used. All the following examples and considerations are related to a damped SDOF system subjected to an external excitation.
Introduction to Dynamics of Structures and Earthquake Engineering
This chapter analyzes the seismic modeling of infill walls. the first part of the chapter describ... more This chapter analyzes the seismic modeling of infill walls. the first part of the chapter describes the main parameters of the infill walls which influences the displacement capacity of a frame system. the failure mechanism are also discussed considering the presence of the surrounding frame. a large variety of analytical models which take into account the presence of infill walls are detailed listed and explained. finally, the mechanisms of crisis of masonry panels (both in-plane and out of plane) are summarized.
Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015)
Journal of Computing in Civil Engineering, 2021
AbstractMany classes of engineering problems focus on the process of calibrating mathematical mod... more AbstractMany classes of engineering problems focus on the process of calibrating mathematical models using observed data. The enormous progress of scientific computation and data-mining techniques ...
The chapter analyzes the structural seismic analysis methods. The four common analysis method are... more The chapter analyzes the structural seismic analysis methods. The four common analysis method are illustrated (Linear static, linear dynamic, nonlinear static, and nonlinear dynamic analyses). Additionally, the direct displacement-based seismic design procedure is discussed in detail.
Reinforced concrete structural components are subjected during their service life to different lo... more Reinforced concrete structural components are subjected during their service life to different loading conditions that may affect their durability and efficiency. This can reduce the safety level of the structure over the time until it degrades completely up to its ultimate limit state. In particular, reinforced concrete elements can develop cracking due to seismic loading leading to the exposure of the reinforced concrete elements to the aggression of external agents. Therefore, their post-earthquake structural assessment can be a procedure of great interest to ensure the durability and efficiency of existing reinforced concrete structures, especially when important and strategic buildings and infrastructural systems are considered. Being able to monitor the development and evolution of cracking may be crucial and this research is aimed at this purpose. In particular, laboratory tests are described on reinforced concrete beams equipped with distributed fiber optics sensors to monit...
The chapter analyzes different methods of solution of the equation of motion. The equation of mot... more The chapter analyzes different methods of solution of the equation of motion. The equation of motion for a forced SDOF system can be solved in closed form if the external excitation can be expressed as a harmonic function (analytical solution). Moreover, the dynamic response of a system subjected to a generic excitation can be evaluated using other approaches based on the decomposition of the irregular external force (Fourier series or Duhamel integral application). In these cases, the solution is achieved by the superposition property, so that they can be applied for a linear system. Clearly, this represents a limit to of the dynamic response of a real system in which the applied excitation causes irreversible deformation. In order to bypass the intrinsic limit of the previously proposed solution approaches, numerical methods are used. All the following examples and considerations are related to a damped SDOF system subjected to an external excitation.
Maintenance, Safety, Risk, Management and Life-Cycle Performance of Bridges
To improve the resilience of critical infrastructure systems, their intrinsic properties need to ... more To improve the resilience of critical infrastructure systems, their intrinsic properties need to be understood and their resilience state needs be identified. In the literature, several methods to evaluate networks' reliability and resilience can be found. However, the applicability of these methods is usually restricted to small-size networks. In this paper, the transportation network of a large-scale virtual city is considered as a case study. A random removal of the roads is applied simulating the network's failure. The network reliability is then calculated using the Destruction Spectrum (D-spectrum) method and a Monte Carlo approach has been developed to generate failure permutations that are necessary for the evaluation of the D-spectrum se. In addition, the Birnbaum Importance Measure (BIM) has been adopted in this study to determine the importance of the network's components. The methodology adopted in this study can be also extended to all network-based systems. The paper also introduces resilience indicators as a soft tool to predict the performance and serviceability of transportation networks.
Introduction to Dynamics of Structures and Earthquake Engineering
The chapter introduces the concept of generalized systems. A brief introduction of the Lagrangian... more The chapter introduces the concept of generalized systems. A brief introduction of the Lagrangian approach applied to the mechanical systems is provided. Furthermore, some numerical examples are reported (system with distributed mass and elasticity, system with distributed elasticity and lumped mass, and general systems).
A computer‐based platform based on signal processing has been developed using a modular programmi... more A computer‐based platform based on signal processing has been developed using a modular programming approach, to enable the selection and the processing of earthquake ground motion records. Structural engineers during the design phase use different specific applications to perform simple tasks such as correcting, filtering, displaying and comparing ground motion records, searching for seismic records that satisfy certain criteria such as spectral matching. The proposed computer‐based platform combines in unified environment different features such as: (i) selection of ground motion records using both spectral and waveform matching, (ii) signal processing, (iii) response spectra analysis, (iv) soil response analysis etc. The novelty of the platform is the implementation of a procedure that allows the selection of earthquake records based on spectral matching criteria using different target spectra such as the Conditional Mean Spectra which has been build for the first time on the Ita...
Introduction to Dynamics of Structures and Earthquake Engineering
This chapter introduces the different passive strategies used to protect the structure from seism... more This chapter introduces the different passive strategies used to protect the structure from seismic actions. The types of passive energy dissipation are illustrated. Furthermore, a large variety of passive energy dissipating systems are analyzed in detail.
Geotechnical, Geological and Earthquake Engineering, 2018
Geotechnical, Geological and Earthquake Engineering, 2018
Geotechnical, Geological and Earthquake Engineering, 2018
Geotechnical, Geological and Earthquake Engineering, 2018
Geotechnical, Geological and Earthquake Engineering, 2018
Geotechnical, Geological and Earthquake Engineering, 2018
Geotechnical, Geological and Earthquake Engineering, 2018
International Journal of Disaster Risk Reduction
Introduction to Dynamics of Structures and Earthquake Engineering
This chapters describes the general procedure used to model a 3D frame using SAP2000. A ten-store... more This chapters describes the general procedure used to model a 3D frame using SAP2000. A ten-storey reinforced concrete building is assumed as case study. Four types of methods of analysis are analyzed for the case study building.
Introduction to Dynamics of Structures and Earthquake Engineering
The chapter analyzes different methods of solution of the equation of motion. The equation of mot... more The chapter analyzes different methods of solution of the equation of motion. The equation of motion for a forced SDOF system can be solved in closed form if the external excitation can be expressed as a harmonic function (analytical solution). Moreover, the dynamic response of a system subjected to a generic excitation can be evaluated using other approaches based on the decomposition of the irregular external force (Fourier series or Duhamel integral application). In these cases, the solution is achieved by the superposition property, so that they can be applied for a linear system. Clearly, this represents a limit to of the dynamic response of a real system in which the applied excitation causes irreversible deformation. In order to bypass the intrinsic limit of the previously proposed solution approaches, numerical methods are used. All the following examples and considerations are related to a damped SDOF system subjected to an external excitation.
Introduction to Dynamics of Structures and Earthquake Engineering
This chapter analyzes the seismic modeling of infill walls. the first part of the chapter describ... more This chapter analyzes the seismic modeling of infill walls. the first part of the chapter describes the main parameters of the infill walls which influences the displacement capacity of a frame system. the failure mechanism are also discussed considering the presence of the surrounding frame. a large variety of analytical models which take into account the presence of infill walls are detailed listed and explained. finally, the mechanisms of crisis of masonry panels (both in-plane and out of plane) are summarized.
Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015)
Journal of Computing in Civil Engineering, 2021
AbstractMany classes of engineering problems focus on the process of calibrating mathematical mod... more AbstractMany classes of engineering problems focus on the process of calibrating mathematical models using observed data. The enormous progress of scientific computation and data-mining techniques ...
The chapter analyzes the structural seismic analysis methods. The four common analysis method are... more The chapter analyzes the structural seismic analysis methods. The four common analysis method are illustrated (Linear static, linear dynamic, nonlinear static, and nonlinear dynamic analyses). Additionally, the direct displacement-based seismic design procedure is discussed in detail.
Reinforced concrete structural components are subjected during their service life to different lo... more Reinforced concrete structural components are subjected during their service life to different loading conditions that may affect their durability and efficiency. This can reduce the safety level of the structure over the time until it degrades completely up to its ultimate limit state. In particular, reinforced concrete elements can develop cracking due to seismic loading leading to the exposure of the reinforced concrete elements to the aggression of external agents. Therefore, their post-earthquake structural assessment can be a procedure of great interest to ensure the durability and efficiency of existing reinforced concrete structures, especially when important and strategic buildings and infrastructural systems are considered. Being able to monitor the development and evolution of cracking may be crucial and this research is aimed at this purpose. In particular, laboratory tests are described on reinforced concrete beams equipped with distributed fiber optics sensors to monit...
The chapter analyzes different methods of solution of the equation of motion. The equation of mot... more The chapter analyzes different methods of solution of the equation of motion. The equation of motion for a forced SDOF system can be solved in closed form if the external excitation can be expressed as a harmonic function (analytical solution). Moreover, the dynamic response of a system subjected to a generic excitation can be evaluated using other approaches based on the decomposition of the irregular external force (Fourier series or Duhamel integral application). In these cases, the solution is achieved by the superposition property, so that they can be applied for a linear system. Clearly, this represents a limit to of the dynamic response of a real system in which the applied excitation causes irreversible deformation. In order to bypass the intrinsic limit of the previously proposed solution approaches, numerical methods are used. All the following examples and considerations are related to a damped SDOF system subjected to an external excitation.
Maintenance, Safety, Risk, Management and Life-Cycle Performance of Bridges
To improve the resilience of critical infrastructure systems, their intrinsic properties need to ... more To improve the resilience of critical infrastructure systems, their intrinsic properties need to be understood and their resilience state needs be identified. In the literature, several methods to evaluate networks' reliability and resilience can be found. However, the applicability of these methods is usually restricted to small-size networks. In this paper, the transportation network of a large-scale virtual city is considered as a case study. A random removal of the roads is applied simulating the network's failure. The network reliability is then calculated using the Destruction Spectrum (D-spectrum) method and a Monte Carlo approach has been developed to generate failure permutations that are necessary for the evaluation of the D-spectrum se. In addition, the Birnbaum Importance Measure (BIM) has been adopted in this study to determine the importance of the network's components. The methodology adopted in this study can be also extended to all network-based systems. The paper also introduces resilience indicators as a soft tool to predict the performance and serviceability of transportation networks.
Introduction to Dynamics of Structures and Earthquake Engineering
The chapter introduces the concept of generalized systems. A brief introduction of the Lagrangian... more The chapter introduces the concept of generalized systems. A brief introduction of the Lagrangian approach applied to the mechanical systems is provided. Furthermore, some numerical examples are reported (system with distributed mass and elasticity, system with distributed elasticity and lumped mass, and general systems).
A computer‐based platform based on signal processing has been developed using a modular programmi... more A computer‐based platform based on signal processing has been developed using a modular programming approach, to enable the selection and the processing of earthquake ground motion records. Structural engineers during the design phase use different specific applications to perform simple tasks such as correcting, filtering, displaying and comparing ground motion records, searching for seismic records that satisfy certain criteria such as spectral matching. The proposed computer‐based platform combines in unified environment different features such as: (i) selection of ground motion records using both spectral and waveform matching, (ii) signal processing, (iii) response spectra analysis, (iv) soil response analysis etc. The novelty of the platform is the implementation of a procedure that allows the selection of earthquake records based on spectral matching criteria using different target spectra such as the Conditional Mean Spectra which has been build for the first time on the Ita...
Introduction to Dynamics of Structures and Earthquake Engineering
This chapter introduces the different passive strategies used to protect the structure from seism... more This chapter introduces the different passive strategies used to protect the structure from seismic actions. The types of passive energy dissipation are illustrated. Furthermore, a large variety of passive energy dissipating systems are analyzed in detail.
Introduction to Dynamics of Structures and Earthquake Engineering, 2018
This work is an elementary but comprehensive textbook which provides the latest updates in the fi... more This work is an elementary but comprehensive textbook which provides the latest updates in the fields of Earthquake Engineering, Dynamics of Structures, Seismology and Seismic Design, introducing relevant new topics to the fields such as the Neodeterministic method. Its main purpose is to illustrate the application of energy methods and the analysis in the frequency domain with the corresponding visualization in the Gauss-Argant plan. However, emphasis is also given to the applications of numerical methods for the solution of the equation of motion and to the ground motion selection to be used in time history analysis of structures. As supplementary materials, this book provides “OPENSIGNAL", a rare and unique software for ground motion selection and processing that can be used by professionals to select the correct earthquake records that would run in the nonlinear analysis.
The book contains clear illustrations and figures to describe the subject in an intuitive way. It uses simple language and terminology and the math is limited only to cases where it is essential to understand the physical meaning of the system.
Therefore, it is suitable also for those readers who approach these subjects for the first time and who only have a basic understanding of mathematics (linear algebra) and static analysis of structures.
