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Progetti di Ricerca (selezione)
Progetti di Ricerca (selezione)
STEELWAR
STEELWAR
Nome progetto: Advanced structural solutions for automated STEELrack supported WARwhouses
Responsabili Scientifici: Silvia Caprili, Francesco Morelli, Walter Salvatore
Periodo: 2018 – 2021
Descrizione: Automated Rack Supported Warehouses (ARSWs) are huge steel buildings nowadays offering the ultimate storage solution for palletized goods, being the available space fully exploited and the handling of goods totally automated. They constitute the evolution of ordinary steel racks, since in ARSWs racks not only bear the weight of the goods but also constitute the structure of the warehouse. At now, no specific standards are available for the design of such structures with specific requirements. The only available are indeed the standards for ordinary steel racks (EN15512 and EN16618) and those for steel construction (e.g. UNI EN1993 – 1), but they are not suitable for the design of ARSWs. STEELWAR research project aims to define a multilevel design approach for ARSWs, focused on fulfil all the specific requirements connected to all their life stages: construction phase, serviceability limit state and ultimate limit state. UNIPI is the coordinator of the whole project and numerous experimental tests are foreseen in the Laboratorio Ufficiale per le Esperienze dei Materiali da Costruzione. The project if funded by the Research Fund for Coal and Steel – European Commission.
Applicability of high strength steel on the realization of High Bay Warehouse
Applicability of high strength steel on the realization of High Bay Warehouse
Nome progetto: Applicability of high strength steel on the realization of High Bay Warehouse supported by the design and experimental validation of a prototype
Responsabile Scientifico: Francesco Morelli, Walter Salvatore
Periodo: 2019 – 2021
Descrizione: High Bay Warehouses (HBWs) represent one of the most advanced solutions for high density storage of products and goods. In these steel structures, the braced uprights, high up to 35 meters, support multiple horizontal pallet beam levels acting as single/double/multiple depth storage bays. Upright alignments are regularly spaced to create multiple aisles where automatic stacker cranes can move for storing and retrieval of products/goods. HBWs are the core of automatic storage system and shall respect severe displacement limits in service condition to guarantee regular operations. Thus, the performances of the steel structure are defined both by resistance and stiffness criteria, where the former is usually related to Ultimate Limit States, while the latter to Serviceability Limit States. The main goal of this Project is to study the advantages of using high strength steels solutions for High Bay Warehouses (HBWs) to be built in low seismicity areas. Within the project, several tests on elements (compression tests on stub columns and on columns, bending tests on uprights, stiffness assessment of pallet beams) and substructures (compression and shear tests on shelves) have been executed.
LASTEICON
LASTEICON
Nome progetto: LASer TEchnology for Innovative CONnections in steel construction
Responsabili Scientifici: Francesco Morelli, Walter Salvatore
Periodo: 2016 – 2020
Descrizione: Circular Hollow Sections (CHS) represent several advantages, such as uniform behavior in all directions, possibility to obtain composite behavior by concrete infill, hence high strength, stability and good fire resistance. Moreover, their aesthetic appeal is a great potential for decision maker’s (architect, building owner) attention. However, they are not widely adopted in practice due to the complexity and high cost of their joint details. LASTEICON project studied simpler joint solutions with reduced fabrication costs, to be adopted between CHS-columns and I-beams, making use of Laser Cutting Technology (LCT). The performance of the optimized joints were assessed through an extensive experimental campaign on full-scale sub-structures.
NEWREBAR
NEWREBAR
Nome progetto: NEW dual‐phase steel REinforcing BARs for enhancing capacity and durability of antiseismic moment resisting frames
Responsabili Scientifici: Silvia Caprili, Walter Salvatore
Periodo: 2015-2019
Descrizione: NEWREBAR research project had the main aim to develop new enhanced typologies of reinforcing steels characterized by improved performance in terms of both mechanical characteristics and durability. More studies in the current scientific literature highlighted relevant decrease of ductility – both in monotonic and cyclic conditions – of traditional reinforcing steels (mainly TempCore®) in presence of aggressive environmental conditions. The project allowed to select, to produce steel rebars (both in reference and corroded conditions) adopting innovative Dual Phase steel grade and to validate the structural response of reinforced concrete elements against seismic action through advanced non linear numerical analysis and specific tests. UNIPI was the coordinator of the whole project and numerous experimental tests on internal and external beam to column joints and base column joints have been executed at the Laboratorio Ufficiale per le Esperienze dei Materiali da Costruzione.
The project if funded by the Research Fund for Coal and Steel – European Commission.
Pubblicazioni (selezione)
Pubblicazioni (selezione)
2021
2021
Piscini A., Morelli F., Salvatore W., Experimental behavior of laser cut I-beam-to-CHS-column steel-concrete composite joints under vertical loads. J Constr Steel Res (2021) ;181:106629. https://doi.org/10.1016/j.jcsr.2021.106629.
Morelli F., Panzera I., Piscini A., Salvatore W., Chichi F., Marconi G., et al. X-ray measure of tensile force in post-tensioned steel cables. Constr Build Mater (2021); 305:124743. https://doi.org/10.1016/j.conbuildmat.2021.124743.
Caprili S., Salvatore W., Valentini R., Corroded TempCore® vs dual-phase steel reinforcing bars. Constr Build Mater (2021); 277:122301. https://doi.org/10.1016/j.conbuildmat.2021.122301.
2020
2020
Morelli F., Piscini A., Salvatore W., Chellini G., Cavallini S., Di Ruscio M., Donati M., Dataset of the experimental behavior of an asymmetric self-centering dissipative device. Data Br (2020);29. https://doi.org/10.1016/j.dib.2020.105181.
Caprili S., Chellini G., Mattei F., Romis F., Salvatore W., Experimental analysis on cyclic performance of concrete columns with TempCore or Dual-Phase steel reinforcement, Bull Earth Eng (2020);18:6761–6794. https://doi.org/10.1007/s10518-020-00959-0.
Resta C., Chellini G., De Falco A., Dynamic assessment of axial load in tie-rods by means of acoustic measurements (2020); BUILDINGS, vol. 10, 23, ISSN: 2075-5309, https://doi.org/10.3390/buildings10020023.
S. Bennati, D. Aita, R. Barsotti, G. Caroti, G. Chellini, A. Piemonte, F. Barsi, C. Traverso. Survey, experimental tests and mechanical modelling of the dome of Pisa Cathedral: a multidisciplinary study (2020); International Journal of Masonry Research and Innovation, 5 (1): 142 - 165.
Emanuele Lorenzo, Riccardo Mario Azzara, Giuseppe Chellini, Emiliano Cieri, Anna De Falco, Carlo Resta, Giacomo Sevieri (2020). Dynamic monitoring of cultural heritage assets: the bell tower of San Francesco church in Pisa (Italy). In: Proceedings of the 17th World Conference on Earthquake Engineering. vol. 1, p. 1-12, Sendai, Japan, September 13th to 18th 2020.
2019
2019
Morelli F., Piscini A., Salvatore W., Development of an asymmetric re-centering dissipative device ( 2019); J Constr Steel Res ;161. https://doi.org/10.1016/j.jcsr.2019.07.004.
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