Aldo Milone’s research while affiliated with University of Naples Federico II and other places

... Studies demonstrated the potential of steel exoskeletons to improve the seismic performance of RC buildings while also meeting structural, thermal and architectural requirements [11]. RC structures retrofitted with steel exoskeletons, at times in combination with local interventions, showed significant improvements in the global structural behavior, while also reducing the number of RC elements affected by brittle failure [12,13]. Cold-formed lightweight steel systems offer an effective structural solution, as they combine the advantages of lightweight construction with strong performance during seismic events. ...

Reference:

Seismic Design and Analysis of a Cold-Formed Steel Exoskeleton for the Retrofit of an RC Multi-Story Residential Building

... Bolt connections are extensively utilized in bridges, large industrial facilities, and prefabricated concrete frame structures within civil engineering due to their structural stability, adaptability, and ease of construction [1][2][3][4]. When subjected to vibrational loads, fatigue failure and loosening can occur in bolt structures, with fatigue failure often emanating from localized loosening [5]. ...

Reference:

Study on bolt loosening mechanism under transverse load considering slip and adhesion status of contact surfaces

... The first methodology, shown in Fig. 15a, has been proposed by Milone et al [95], and consists in evaluating the averaged SED curve vs the number of cycles for different values of the stress ratio R; the calibrated value of the control volume radius R 0 is the one that minimize the scatter index of the fatigue curve in terms of SED, T ΔW . The fatigue dataset collected in the present paper resulted in a control volume radius of R 0 = 2.32 mm considering the fatigue data having failure between 10 4 and 2x10 6 cycles. ...

Reference:

An innovative and sustainable methodology for fatigue characterization and design

... This condition-in conjunction with (i) structural shortages deriving from the lack of adequate provisions at the time of erection, (ii) peculiar constructional imperfections deriving from the hot-driving process (HDP), and (iii) the diffuse increase of traffic loads in recent times-leaves riveted details exposed to severe fatigue damage. This further proves to be a critical issue if one considers the limited redundancy of truss bridge structures [9][10][11][12]. ...

Reference:

Advanced Fatigue Assessment of Riveted Railway Bridges on Existing Masonry Abutments: An Italian Case Study

... It is noteworthy that, in a context in which sustainability aspects in the construction sector have received great attention from the scientific and professional community [23][24][25][26], this solution has the potential to align with the Life Cycle Thinking principles [27,28]. Furthermore, as demonstrated by several real-world application case studies [29,30], the design of a holistic intervention with exoskeletons is often practicable [31,32], addressing the structural safety [33] while simultaneously enhancing the energetic performance [34,35], and aesthetic value [36][37][38] through the creation of a second façade of the building [39,40]. ...

Reference:

Performance-based optimization of steel exoskeletons: An alternative approach to standard regulations

... Local failures pertaining to chord-to-column connections or diagonal connections were not within the scope of this study. The influence of these local components on comprehensive seismic assessments was already discussed by the authors in a prior publication [30]. Figure 7 illustrates the pushover curves derived for the six industrial buildings investigated in the longitudinal direction, accompanied by the capacity point, as defined by the aforementioned performance criteria. ...

Reference:

Influence of Column–Base Connections on Seismic Behavior of Single-Story Steel Buildings

... Corrosion stands out as a primary structural degradation process that significantly impacts structural integrity, a reduction in the effective cross-sectional area, moment of inertia, torsional and warping constants [48,49]. The interaction between corrosion and cyclic loading, commonly recognised as corrosion fatigue, affects the mechanical properties of steel, resulting in the initiation of cracks from the corrosion-induced surface and a substantial decrease in fatigue strength [50][51][52][53]. This degradation is evident in a typical S-N curve of a material exposed to an air environment influenced by the corrosion process, as depicted in Fig. 1. ...

Reference:

High-cycle fatigue design curves of mild- and high-strength steels for offshore applications

... For instance, the fatigue problem of stay cables was analyzed for in-service cable-stayed bridges under combined actions of traffic and wind [14], employing the bilinear S-N curve for bridge cables provided by Eurocode 3 [15]. Furthermore, considering the susceptibility of bridge cables to corrosion damage in harsh environments, many researchers [16][17][18] estimated the fatigue life of intact and corroded bridge cables with different section forms using S-N curves and Miner cumulative damage criterion. However, these studies primarily revolved around the fatigue life assessment problem only for bridge cables under axial cyclic loading. ...

Reference:

Tension-bending coupled fatigue life study of semi-parallel steel wire cables using a developed LEFM method

... When designing the reinforced concrete column steel beam frame, refer to the standards listed in the relevant codes GB50010-2010 and GB50011-2010 [14] and design the reinforced concrete column steel beam frame model for experimental analysis. The height of each floor of the model is designed as 1.5 m, and the number of spans is designed as 3 × 2. Compared with the actual building, the model is reduced by 1/3. ...

Reference:

Analysis of monolithic collapse resistance of reinforced concrete column-steel beam frame structures

... Indeed, as stated in Section 2, the same deep profile is adopted for main beams at each storey (i.e., IPN 320), while columns become thinner along the height of the building. It is worth reporting that this result complies with outcomes previously derived by the Authors [9,10], which investigated the local response of non-conforming MR joints extracted from the case study by means of refined local FE analyses. Indeed, as reported in [9], asbuilt MR joints collapsed due to premature failure of connections on the columns' side at each floor, while beams always behaved elastically up to failure. ...

Reference:

Seismic Assessment and Strengthening of an Existing Non‐Conforming Multi‐Storey Steel Building