المؤلفون: Minafò, G.^Aff10, Camarda, G.^Aff10, Papia, M.^Aff10, La Mendola, L.^Aff10

المساهمون: di Prisco, Marco, Series Editor^{Aff1, Aff8}, Chen, Sheng-Hong, Series Editor^Aff2, Vayas, Ioannis, Series Editor^Aff3, Kumar Shukla, Sanjay, Series Editor^Aff4, Sharma, Anuj, Series Editor^Aff5, Kumar, Nagesh, Series Editor^Aff6, Wang, Chien Ming, Series Editor^Aff7, Menegotto, Marco, editor^Aff9

المصدر: Proceedings of Italian Concrete Conference 2020/21. 351:697-708

المؤلفون: Aiello, M.A., Bencardino, F., Cascardi, A., D'Antino, T., Fagone, M., Frana, I., La Mendola, L., Lignola, G.P., Mazzotti, C., Micelli, F., Minafò, G., Napoli, A., Ombres, L., Oddo, M.C., Poggi, C., Prota, A., Ramaglia, G., Ranocchiai, G., Realfonzo, R., Verre, S.

المصدر: In Construction and Building Materials 6 September 2021 298

المؤلفون: Monaco A., Pagnotta S., Colajanni P., La Mendola L.

المساهمون: Monaco A., Pagnotta S., Colajanni P., La Mendola L.

المصدر: Procedia Structural Integrity. 44:1925-1932

مصطلحات موضوعية: Settore ICAR/09 - Tecnica Delle Costruzioni, Friction dampers, Hybrid steel-trussed-concrete beams, RC joints, Finite element models, Earthquake design, Earth-Surface Processes

الوصف: The most recent design strategies welcome the adoption of innovative techniques for seismic energy input mitigation, aiming to achieve high dissipation capacity, prevent the structure from collapse and ensure the serviceability of the construction. Friction damper devices have been widely adopted in framed steel structures for decades, while their introduction in different structural types is still under investigation. This paper presents the outcomes of innovative research supported by the industry and conducted on beam-to-column connections of RC structures in which the beams are Hybrid Steel-Trussed Concrete Beams (HSTCBs) and the columns are classical RC pillars. An innovative solution, recently patented, has been found for the mitigation of the effects of seismic cyclic actions on small-sized beam-column joints, typically characterised by a large amount of longitudinal reinforcement due to the small effective depth of the beam. This paper collects the main featuring steps of the innovative research, which has led to the patented solution. The calculation procedure for designing the proposed connection is shown, and the validation through 3D finite element modelling is described. For the structural analysis of the joint, several monotonic and cyclic simulations have been carried out with the scope of investigating different design moment values. The finite element results proved that the patented solution is effective in preventing beam, column and joint from damage and it is suitable for exhibiting adequate dissipative capacity ensured by a flexural behaviour dominated by wide and stable hysteresis loops.

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::67780d8c1ad3e62d24cfca9d2e165557
https://doi.org/10.1016/j.prostr.2023.01.246

المؤلفون: Oddo M. C., Minafo' G., La Mendola L.

المساهمون: Oddo M.C., Minafo' G., La Mendola L.

المصدر: Procedia Structural Integrity. 44:2294-2301

مصطلحات موضوعية: Tensile behaviour, Shear bond behaviour, FRCM, Masonry, Basalt, Earth-Surface Processes

الوصف: The use of Fabric Reinforced Cementitious Matrix (FRCM) composites for structural retrofit has seen an increased interest among the scientific community, during the last decade. Various studies have revealed their effectiveness as external retrofitting technique of masonry elements, offering numerous advantages respect to the well know Fibre Reinforced Polymer (FRP) in terms of compatibility with masonry support, reversibility of intervention and sustainability. Despite the growing use, the characterization of FRCM mechanical behaviour is still an open issue, due to numerous uncertainties involved in test set-up adopted and fibre-mortar combination. The proposed experimental study aims to investigate the tensile and shear bond behaviour of Basalt-FRCM for strengthening calcarenite masonry elements. Calcarenite is a natural stone with sedimentary origin and it is widely present in existing buildings of the Mediterranean areas. Direct tensile tests are performed on two types of Basalt-FRCM coupons, with cement-based and lime-based mortar, adopting two different test-set-up based on clamping and clevis grip methods. Moreover, double shear bond tests are carried out to evaluate the adhesion properties of the two types of Basalt-FRCM with calcarenite support. Experimental outcomes are compared in terms of stress-strain curves, evaluating the influence of mortar grade and test set-up on the mechanical performances of Basalt-FRCM composites. The comparisons provide information about the mechanical stress transfer phenomena that occur at the fibre-to-matrix and FRCM-to-substrate interface level and the failure modes.

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a25e5caad6a9886e26fb176469788d4
https://doi.org/10.1016/j.prostr.2023.01.293

المؤلفون: Pagnotta S., Monaco A., Colajanni P., La Mendola L.

المساهمون: Pagnotta S., Monaco A., Colajanni P., La Mendola L.

المصدر: Procedia Structural Integrity. 44:1909-1916

مصطلحات موضوعية: Settore ICAR/09 - Tecnica Delle Costruzioni, Earthquake design, Experimental test, Friction dampers, Hybrid steel-trussed concrete beams, RC joints, Friction dampers, Hybrid steel-trussed concrete beams, RC joints, Experimental test, Earthquake design, Earth-Surface Processes

الوصف: Low-damage design of structures in seismic-prone areas is becoming an efficient strategy to obtain "earthquake-proof" buildings, i.e. buildings that, even in the case of severe seismic actions, experience a low or negligible amount of damage. Besides the safeguard of human lives, this design strategy aims also to limit the downtime of buildings, which represents a significant source of economic loss, and to ensure an immediate occupancy in the aftermath of an earthquake. In this context, focusing on moment-resisting frames (MRFs), several solutions have been developed for the beam-to-column connections (BCCs) of steel and precast/prestressed concrete structures, but very few for cast-in-situ reinforced concrete (RC) structures. This paper focuses on a recently-proposed friction-based BCC for MRFs made with hybrid steel-trussed concrete beams (HSTCBs). The latter are made by a spatial lattice built using V-shaped rebars and a steel bottom plate, which eases the introduction of a friction dissipative device. HSTCBs are usually characterized by a small effective depth, which leads to a large amount of longitudinal rebars. The latter, together with a small-sized beam-column joint, make it potentially subjected to severe damage, which reduces its dissipative capacity. The shear force acting on the joint can be reduced by endowing the BCC with a friction device, with the aim of increasing the lever arm of the bending moment transferred between beam and joint, preventing the latter from damage. To evaluate the mechanical performance of the above connection, two experimental programs have been carried out at the Structures Laboratory of the University of Palermo. The first one focused on the characterization of the friction properties of two different materials (thermal sprayed aluminum and brass), by means of a linear dissipative device subjected to cyclic load. The second one tested a beam-to-column subassembly endowed with the recently-proposed connection in which the dissipative device was made with the best performing friction material tested before. The results of the cyclic tests are presented and commented, showing the promising performance of such connection in providing a low-damage behavior and a satisfactory dissipative capacity.

URL الوصول: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b327a198dcc56f6b5df718636428a87e
https://doi.org/10.1016/j.prostr.2023.01.244

المؤلفون: Campione, G.^Aff7, Cannella, F.^Aff7, Cavaleri, L.^Aff7, La Mendola, L.^Aff7, Monaco, A.^Aff7

المساهمون: di Prisco, Marco, Series Editor^{Aff1, Aff5}, Chen, Sheng-Hong, Series Editor^Aff2, Solari, Giovanni, Series Editor^Aff3, Vayas, Ioannis, Series Editor^Aff4, Menegotto, Marco, editor^Aff6

المصدر: Proceedings of Italian Concrete Days 2016. 10:425-439

المؤلفون: MINAFO' G, RUSTICANO G, LA MENDOLA L, PENNISI S

المساهمون: MINAFO' G, RUSTICANO G, LA MENDOLA L, PENNISI S

مصطلحات موضوعية: structural model, pushover analysis, Settore ICAR/09 - Tecnica Delle Costruzioni, macro-element, masonry, assessment, historical building, building knowledge, Settore ICAR/11 - Produzione Edilizia, reinforced concrete

الوصف: The structural assessment of existing historical structures is a complex task due to the inner main difficulty in making up reliable models for structural analysis, able to include mechanical and geometrical nonlinearities, existing damage, complex configurations and arrangements of materials. This task becomes more difficult in mixed RC-masonry structures, which structural modelling can be particularly tough due to the different connections and interactions between structural members and materials. This paper presents the case study of a multi-storey mixed Reinforced Concrete (RC)- masonry historical structure, namely the former mill “Molino-Pastificio Soresi” building, located in Partinico (Sicily—Italy). It is shown as it is possible to obtain an accurate and detailed representation of the building, as well as a reliable structural model. The assessment of the seismic vulnerability from the global point of view of the considered case study is carried out through a multidisciplinary approach based on four stages: (1) historic analysis and study of the relevance of the building; (2) geometrical survey and photographic documentation; (3) structural identification and materials; (4) BIM implementation and structural modelling.

URL الوصول: https://explore.openaire.eu/search/publication?articleId=od______3658::38a85851e27a63978c0fac0c8fa76680
http://hdl.handle.net/10447/570646

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المؤلفون: Monaco A., D'Anna J., Minafo' G., LA MENDOLA L.

المساهمون: Monaco A., D'Anna J., Minafo' G., LA MENDOLA L.

مصطلحات موضوعية: Analytical modelling, Masonry columns, Parametric analysis, FRCM, Confinement, FRP

الوصف: This paper presents a critical review of the most established analytical models for the prediction of the compressive strength of FRP and FRCM-confined masonry columns. In particular, two types of fibres are analysed, i.e. glass and basalt. A wide dataset available in the literature is used for the application of the analytical models and for the development of parametric analyses useful for the critical comparison of FRP vs. FRCM confinement technique and glass vs. basalt fibres to be adopted as reinforcement of masonry substrate. The effects of stiffness and strength of the reinforcement, the number of reinforcing layers, the compressive strength of masonry and the cross-section shape are investigated.

URL الوصول: https://explore.openaire.eu/search/publication?articleId=od______3658::726c1b22f542336f5d2ad7d4df196226
https://hdl.handle.net/10447/586640

المؤلفون: Minafo' G., La Mendola L., Oddo M. C.

المساهمون: Minafo' G., La Mendola L., Oddo M.C.

مصطلحات موضوعية: Cracking, Settore ICAR/09 - Tecnica Delle Costruzioni, Tensile Behaviour, Bond Behaviour, Interface, FRCM

الوصف: Fabric Reinforced Cementitious Matrix (FRCM) materials are increasingly common for strengthening existing masonry structures. Their popularity is due to their many advantages with respect to resin-based composites, especially when applied to stone supports. The constitutive behaviour of FRCM materials is defined by the combination of their tensile response and the bond behaviour with the masonry support, both depending on complex stress transfer mechanisms between matrix and fabric, especially in the post-cracking stage. This paper presents a numerical study which aims to predict the mechanical behaviour of FRCM systems through simple 2D models of truss elements and non-linear springs to simulate the fabric-to-matrix and composite-to-substrate interaction. The comparisons between results of numerical approach and experimental responses showing that the proposed methodology is an effective and easy tool to predict the mechanical behaviour of FRCM composites.

URL الوصول: https://explore.openaire.eu/search/publication?articleId=od______3658::e2998e29bda90a944d5977de2903a984
https://hdl.handle.net/10447/586641