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Infrastructure plays a key role in society. Recent collapses of bridges have underlined their importance for road functionality, causing disruptions to commuters and emergency vehicles. Major issues arise on rural roads, where the lack of redundancy leads to the isolation of entire communities. Actual approaches to assess the resilience of countryside roads rely on the availability of specific datasets, limiting their practical application; this issue is typically related to traffic data. This research aims to propose innovative algorithms to assess the road network’s vulnerability in rural areas, including a novel traffic data collection process and its calibration. The aggregate metric is called Detour-Impact Index (DII) and compares user costs before and after a disruptive event. The method uses traditional network-impact metrics in combination with a new algorithm that allows us to gather quantitative traffic data starting from qualitative information. User travel time showed good agreement between the proposed procedure and traditional web-based methods. Furthermore, the paper provides user delay costs functions accounting for traffic composition, trip purposes, vehicle operative costs, nonlinear volume–capacity relation, and average daily traffic. A significant aspect is the adaptability of this framework, as it is designed to be coupled with existing approaches. The method is demonstrated on a case study in Tuscany (Italy).
Alessandro Pucci; Mario Lucio Puppio; Hélder Silva Sousa; Linda Giresini; José Campos Matos; Mauro Sassu. Detour-Impact Index Method and Traffic Gathering Algorithm for Assessing Alternative Paths of Disrupted Roads. Transportation Research Record: Journal of the Transportation Research Board 2021, 1 .
AMA StyleAlessandro Pucci, Mario Lucio Puppio, Hélder Silva Sousa, Linda Giresini, José Campos Matos, Mauro Sassu. Detour-Impact Index Method and Traffic Gathering Algorithm for Assessing Alternative Paths of Disrupted Roads. Transportation Research Record: Journal of the Transportation Research Board. 2021; ():1.
Chicago/Turabian StyleAlessandro Pucci; Mario Lucio Puppio; Hélder Silva Sousa; Linda Giresini; José Campos Matos; Mauro Sassu. 2021. "Detour-Impact Index Method and Traffic Gathering Algorithm for Assessing Alternative Paths of Disrupted Roads." Transportation Research Record: Journal of the Transportation Research Board , no. : 1.
In this paper, the use of Fast Falling Weight Deflectometer (Fast-FWD) is analyzed as a non-destructive and quick test procedure to evaluate the efficiency of short-span bridges. The Fast-FWD is an instrument that can produce a broadband dynamic force up to an impact value of 120 KN: The impact is constant and replicable, providing accurate action measures of bridge stiffness in a truly short period (30 ms). In this paper, a single-span reinforced concrete bridge is investigated, using the Fast-FWD. The considered bridge, approximately 12.0 m long and 15.5 m wide, was in critical condition. The bridge is in a suburban principal road near to the City of Cagliari in Sardinia (Italy), with an Annual Average Daily Traffic of 13,500 vehicles/day, and was suddenly closed, creating serious problems for urban mobility. In these conditions, the investigation through other standard techniques is time-consuming and labor intensive. For this reason, it is important to introduce methods that can be rapid, accurate and cost-efficient. In this paper, bridge stiffness values obtained during the in situ experimental campaign were compared with finite element models values. The Fast-FWD has the potential to provide engineering information that can help us to better understand bridge condition, in a rapid and cost-effective procedure.
Mauro Coni; Fausto Mistretta; Flavio Stochino; James Rombi; Mauro Sassu; Mario Puppio. Fast Falling Weight Deflectometer Method for Condition Assessment of RC Bridges. Applied Sciences 2021, 11, 1743 .
AMA StyleMauro Coni, Fausto Mistretta, Flavio Stochino, James Rombi, Mauro Sassu, Mario Puppio. Fast Falling Weight Deflectometer Method for Condition Assessment of RC Bridges. Applied Sciences. 2021; 11 (4):1743.
Chicago/Turabian StyleMauro Coni; Fausto Mistretta; Flavio Stochino; James Rombi; Mauro Sassu; Mario Puppio. 2021. "Fast Falling Weight Deflectometer Method for Condition Assessment of RC Bridges." Applied Sciences 11, no. 4: 1743.
Several relevant collapses of historical urban walls happened in Tuscany in the last ten years, due to rainfalls. The wide extension of the walls, with difficulties of proper monitoring, joined with lack of maintenance, contributed to the failures. This recalled the attention on their vulnerability, in view to ensure a proper safety level and appropriate cultural heritage protection. In this paper, a method of extensive and quick structural survey to identify the mechanical characteristics of an historical urban wall path is proposed. It is based on geographic method of management of the territory (GIS database, satellite data). The data are obtained throughout a discretization of the walls in a wide set of vertical sections. A reduced subset of sections is directly surveyed, while the others are indirectly identified via numerical procedure, with the help of GIS data. A specific form to take note of the most relevant features is edited. The method is tested on the entire perimeter of the Middle Age walls of Volterra (2,6 km), affected by two relevant collapses in 2014. The procedure of survey is conceived to perform structural analysis to evaluate the vulnerability to landslides and earthquake risks, in view to determine restoration strategies and consolidation or monitoring programs.
M.L. Puppio; E. Vagaggini; L. Giresini; M. Sassu. Large-scale survey method for the integrity of historical urban walls: application to the case of Volterra (Italy). Procedia Structural Integrity 2020, 28, 330 -343.
AMA StyleM.L. Puppio, E. Vagaggini, L. Giresini, M. Sassu. Large-scale survey method for the integrity of historical urban walls: application to the case of Volterra (Italy). Procedia Structural Integrity. 2020; 28 ():330-343.
Chicago/Turabian StyleM.L. Puppio; E. Vagaggini; L. Giresini; M. Sassu. 2020. "Large-scale survey method for the integrity of historical urban walls: application to the case of Volterra (Italy)." Procedia Structural Integrity 28, no. : 330-343.
Mario Lucio Puppio; Martina Ferrini. Parametric analysis on external dissipative link system for seismic protection of low rise r.c. buildings. Frattura ed Integrità Strutturale 2019, 13, 706 -739.
AMA StyleMario Lucio Puppio, Martina Ferrini. Parametric analysis on external dissipative link system for seismic protection of low rise r.c. buildings. Frattura ed Integrità Strutturale. 2019; 13 (48):706-739.
Chicago/Turabian StyleMario Lucio Puppio; Martina Ferrini. 2019. "Parametric analysis on external dissipative link system for seismic protection of low rise r.c. buildings." Frattura ed Integrità Strutturale 13, no. 48: 706-739.
Mario Lucio Puppio; Linda Giresini; Fabio Doveri; Mauro Sassu. Structural irregularity: The analysis of two reinforced concrete (r.c.) buildings. Engineering Solid Mechanics 2019, 13 -34.
AMA StyleMario Lucio Puppio, Linda Giresini, Fabio Doveri, Mauro Sassu. Structural irregularity: The analysis of two reinforced concrete (r.c.) buildings. Engineering Solid Mechanics. 2019; ():13-34.
Chicago/Turabian StyleMario Lucio Puppio; Linda Giresini; Fabio Doveri; Mauro Sassu. 2019. "Structural irregularity: The analysis of two reinforced concrete (r.c.) buildings." Engineering Solid Mechanics , no. : 13-34.
Marco Lucio Puppio; Sara Novelli; Mauro Sassu. Failure evidences of reduced span bridges in case of extreme rainfalls The case of Livorno. Frattura ed Integrità Strutturale 2018, 12, 190 -202.
AMA StyleMarco Lucio Puppio, Sara Novelli, Mauro Sassu. Failure evidences of reduced span bridges in case of extreme rainfalls The case of Livorno. Frattura ed Integrità Strutturale. 2018; 12 (46):190-202.
Chicago/Turabian StyleMarco Lucio Puppio; Sara Novelli; Mauro Sassu. 2018. "Failure evidences of reduced span bridges in case of extreme rainfalls The case of Livorno." Frattura ed Integrità Strutturale 12, no. 46: 190-202.
The present paper deals with the influence of material variability on the seismic vulnerability assessment of reinforced concrete buildings. Existing r.c. buildings are affected by a strong dispersion of material strengths of both the base materials. This influences the seismic response in linear and nonlinear static analysis. For this reason, it is useful to define a geometrical parameter called “material eccentricity”. As a reference model, an analysis of a two storey building is presented with a symmetrical plan but asymmetrical material distribution. Furthermore, an analysis of two real buildings with a similar issue is performed. Experimental data generate random material distributions to carry out a probabilistic analysis. By rotating the vector that defines the position of the center of strength it is possible to describe a strength domain that is characterized by equipotential lines in terms of the Risk Index. Material eccentricity is related to the Ultimate Shear of non-linear static analyses. This relevant uncertainty, referred to as the variation of the center of strength, is not considered in the current European and Italian Standards. The “material eccentricity” therefore reveals itself to be a relevant parameter to considering how material variability affects such a variation.
Mario Lucio Puppio; Martina Pellegrino; Linda Giresini; Mauro Sassu. Effect of Material Variability and Mechanical Eccentricity on the Seismic Vulnerability Assessment of Reinforced Concrete Buildings. Buildings 2017, 7, 66 .
AMA StyleMario Lucio Puppio, Martina Pellegrino, Linda Giresini, Mauro Sassu. Effect of Material Variability and Mechanical Eccentricity on the Seismic Vulnerability Assessment of Reinforced Concrete Buildings. Buildings. 2017; 7 (4):66.
Chicago/Turabian StyleMario Lucio Puppio; Martina Pellegrino; Linda Giresini; Mauro Sassu. 2017. "Effect of Material Variability and Mechanical Eccentricity on the Seismic Vulnerability Assessment of Reinforced Concrete Buildings." Buildings 7, no. 4: 66.
The effect of irregularities due to the non-uniform distribution of material properties on structural elements of a significant real case is here investigated. Mechanical tests performed on a typical Italian reinforced concrete (r.c.) school building built in the 1960s showed irregularity in the distribution of compression strength in columns, even though the construction is featured by substantially symmetric distribution of the frames. Extreme scenarios in the distribution of irregularities in compression strength of concrete columns are analyzed, with the hypothesis of rigid or deformable slabs. The seismic analysis showed the influence of the response due to the irregular distributions of concrete strength. A proposal of equivalent “material eccentricity” is shown to account for the mentioned irregularity. Furthermore, the practical solution of reinforcement to mitigate the effects of irregularities is also described. It consists of couple of external r.c. walls stiffened by r.c. buttresses added to the building, connected by transverse slabs. An extensive reduction of material eccentricity is achieved, together with a relevant improvement in seismic capacity.
Mauro Sassu; Mario Lucio Puppio; Eleonora Mannari. Seismic Reinforcement of a R.C. School Structure with Strength Irregularities throughout External Bracing Walls. Buildings 2017, 7, 58 .
AMA StyleMauro Sassu, Mario Lucio Puppio, Eleonora Mannari. Seismic Reinforcement of a R.C. School Structure with Strength Irregularities throughout External Bracing Walls. Buildings. 2017; 7 (4):58.
Chicago/Turabian StyleMauro Sassu; Mario Lucio Puppio; Eleonora Mannari. 2017. "Seismic Reinforcement of a R.C. School Structure with Strength Irregularities throughout External Bracing Walls." Buildings 7, no. 4: 58.
Elisa Bonannini; Marco Cinotti; Mario Lucio Puppio; Mauro Sassu. Seismic response of a stock of social housings in Italy with r.c. and masonry materials. Proceedings of the Second International Conference on Mechanics, Materials and Structural Engineering (ICMMSE 2017) 2017, 1 .
AMA StyleElisa Bonannini, Marco Cinotti, Mario Lucio Puppio, Mauro Sassu. Seismic response of a stock of social housings in Italy with r.c. and masonry materials. Proceedings of the Second International Conference on Mechanics, Materials and Structural Engineering (ICMMSE 2017). 2017; ():1.
Chicago/Turabian StyleElisa Bonannini; Marco Cinotti; Mario Lucio Puppio; Mauro Sassu. 2017. "Seismic response of a stock of social housings in Italy with r.c. and masonry materials." Proceedings of the Second International Conference on Mechanics, Materials and Structural Engineering (ICMMSE 2017) , no. : 1.
L. Giresini; Paulo Lourenco; Mario Lucio Puppio; M. Sassu. Rocking and kinematic analysis of two masonry church façades. Structural Analysis of Historical Constructions: Anamnesis, Diagnosis, Therapy, Controls 2016, 1190 -1196.
AMA StyleL. Giresini, Paulo Lourenco, Mario Lucio Puppio, M. Sassu. Rocking and kinematic analysis of two masonry church façades. Structural Analysis of Historical Constructions: Anamnesis, Diagnosis, Therapy, Controls. 2016; ():1190-1196.
Chicago/Turabian StyleL. Giresini; Paulo Lourenco; Mario Lucio Puppio; M. Sassu. 2016. "Rocking and kinematic analysis of two masonry church façades." Structural Analysis of Historical Constructions: Anamnesis, Diagnosis, Therapy, Controls , no. : 1190-1196.
The paper deals with the use of vibro-compressed units with bio-natural components on construction. The proposed mix design of vibrated blocks consist of cork granules and/or hemp shives, with the aim to substitute polymeric elements or expanded clay, together with the use of natural hydraulic lime (NHL) as binder. An experimental campaign is presented, with mechanical tests to evaluate the influence of each component on flexural and compression behavior. The proposal is also investigated from a productive point of view, considering how it can be harmonized in the productive process of lightweight aggregate concrete units without modifications in the productive process. The tested elements could perform a certain reduction of the carbon impact, maintaining interesting mechanical properties. The application of the proposed units in several contexts, as separating elements joined with structural components, is considered to improve rehabilitation or to obtain higher performances in buildings.
Mauro Sassu; Linda Giresini; Elisa Bonannini; Mario Lucio Puppio. On the Use of Vibro-Compressed Units with Bio-Natural Aggregate. Buildings 2016, 6, 40 .
AMA StyleMauro Sassu, Linda Giresini, Elisa Bonannini, Mario Lucio Puppio. On the Use of Vibro-Compressed Units with Bio-Natural Aggregate. Buildings. 2016; 6 (3):40.
Chicago/Turabian StyleMauro Sassu; Linda Giresini; Elisa Bonannini; Mario Lucio Puppio. 2016. "On the Use of Vibro-Compressed Units with Bio-Natural Aggregate." Buildings 6, no. 3: 40.
Experimental tests and constructive assessments are presented for a simple bamboo framed structure with innovative low-cost and low technology joints, specifically conceived for small buildings in developing countries. Two full scale one-storey bamboo frames have been designed by using the simplest joints solution among three different tested typologies. The entire building process is based on low-technology and natural materials: bamboo canes, wooden cylinders, plywood plates and canapé rods. The first full scale specimen (Unit A) is a one-storey single deck truss structure subjected to monotonic collapse test; the second full scale specimen (Unit B) is a one-storey double deck truss structure used to evaluate the construction time throughout assembling tests. The first full scale specimen showed ductility in collapse and ease in strengthening; the second one showed remarkable ease and speed in assembling structural elements. Finally several constructive solutions are suggested for the design of simple one-storey buildings; they are addressed to four purposes (housing, school, chapel, health center) by the composition of the proposed full scale bamboo frames. Ease of use and maintenance with a low level of technology contribute to application in developing countries although not exclusively.
Mauro Sassu; Anna De Falco; Linda Giresini; Mario Lucio Puppio. Structural Solutions for Low-Cost Bamboo Frames: Experimental Tests and Constructive Assessments. Materials 2016, 9, 346 .
AMA StyleMauro Sassu, Anna De Falco, Linda Giresini, Mario Lucio Puppio. Structural Solutions for Low-Cost Bamboo Frames: Experimental Tests and Constructive Assessments. Materials. 2016; 9 (5):346.
Chicago/Turabian StyleMauro Sassu; Anna De Falco; Linda Giresini; Mario Lucio Puppio. 2016. "Structural Solutions for Low-Cost Bamboo Frames: Experimental Tests and Constructive Assessments." Materials 9, no. 5: 346.
M Sassu; M Andreini; A De Falco; L Giresini; M Puppio. Structural protection after landslide phenomena: A case study in Northern Italy. Civil Engineering and Urban Planning IV 2016, 241 -246.
AMA StyleM Sassu, M Andreini, A De Falco, L Giresini, M Puppio. Structural protection after landslide phenomena: A case study in Northern Italy. Civil Engineering and Urban Planning IV. 2016; ():241-246.
Chicago/Turabian StyleM Sassu; M Andreini; A De Falco; L Giresini; M Puppio. 2016. "Structural protection after landslide phenomena: A case study in Northern Italy." Civil Engineering and Urban Planning IV , no. : 241-246.
A proposal for the seismic consolidation of an existing r. c. social housing complex is presented. The intervention is thought to concern just the external facades in order to minimize costs and discomfort of inhabitants. Two external hybrid steel-glass bracing frameworks have been designed, with the aim to reach both seismic and energetic advantages. The mechanics of the framework system takes advantages from the compressive strength of the glass panels and the tension strength of steel braces and columns. A hypothetical application on a typical r. c. building dating back to the ‘60s in the city of Leghorn (Italy) is illustrated.
Anna DE Falco; Maurizio Froli; Linda Giresini; Mario Lucio Puppio; Mauro Sassu. A Proposal for the Consolidation of a R.C. Social Housing by Means of External Hybrid Steel-Glass Frameworks. Applied Mechanics and Materials 2014, 638-640, 3 -8.
AMA StyleAnna DE Falco, Maurizio Froli, Linda Giresini, Mario Lucio Puppio, Mauro Sassu. A Proposal for the Consolidation of a R.C. Social Housing by Means of External Hybrid Steel-Glass Frameworks. Applied Mechanics and Materials. 2014; 638-640 ():3-8.
Chicago/Turabian StyleAnna DE Falco; Maurizio Froli; Linda Giresini; Mario Lucio Puppio; Mauro Sassu. 2014. "A Proposal for the Consolidation of a R.C. Social Housing by Means of External Hybrid Steel-Glass Frameworks." Applied Mechanics and Materials 638-640, no. : 3-8.