Jet-Pacs Project: Dynamic Experimental Tests and Numerical Results Obtained for a Steel Frame Equipped with Hysteretic Damped Chevron Braces

The experimental and numerical results obtained by Research Units of the University of Basilicata and University of Calabria for a steel frame, bare or equipped with metallic yielding hysteretic dampers (HYDs), are compared. The shaking table tests were performed at the Structural Laboratory of the University of Basilicata within a wide research program, named JETPACS (“Joint Experimental Testing on Passive and semiActive Control Systems”), which involved many Research Units working for the Research Line 7 of the ReLUIS (Italian Network of University Laboratories of Earthquake Engineering) 2005–2008 project. The project was entirely founded by the Italian Department of Civil Protection. The test structure is a 1/1.5 scaled two-story, single-bay, three-dimensional steel frame. Four HYDs, two for each story, are inserted at the top of chevron braces installed within the bays of two parallel plane frames along the test direction. The HYDs, constituted of a low-carbon U-shaped steel plate, were designed with the performance objective of limiting the inter-story drifts so that the frame yielding is prevented. Two design solutions are considered, assuming the same stiffness of the chevron braces with HYDs, but different values of both ductility demand and yield strength of the HYDs. Seven recorded accelerograms matching on average the response spectrum of Eurocode 8 for a high-risk seismic region and a medium subsoil class are considered as seismic input. The experimental results are compared with the numerical ones obtained considering an elastic-linear law for the chevron braces (in tension and compression), providing that the buckling be prevented, and the Bouc-Wen model to simulate the response of HYDs.     

The emerald and gold necklace from Oplontis,Vesuvian Area,Naples, Italy

The present study refers to the characterization of an emerald and gold necklace, dating from the first century AD, found in Oplontis (Torre Annunziata, Naples, Italy), using non-destructive methodologies such as EPMA and microFTIR. Reference samples, from mines known to be active in the Roman Imperial period, were collected and analyzed using the same techniques. Experimental data were also statistically treated in order to classify the emeralds' mines. The comparison of archaeological and reference data allowed to hypothesize, with high probability, an Egyptian origin for the Oplontis emeralds – even if the Habachtal mine cannot be definitively excluded.     

We Branded Ourselves Long Ago: Intangible Cultural Property and Commodification of Fijian Firewalking

ABSTRACT The Fijian firewalking ceremony (vilavilairevo), traditionally performed only by members of the Sawau people on the island of Beqa, is a prime example of a propitiation ritual that has become commodified to suit the requirements of tourism. The Sawau ‘gift’ of walking on white‐hot stones introduces another dimension of the gift practice. Although gifts and commodities are often treated as ideal‐type opposites, and a tradition of Melanesian scholarship has focused attention on the inalienability of gifts, I argue that the self‐consciously traditional firewalking practice of Beqa Island, Fiji, is an inalienable sui generis commodity that becomes effective by ‘branding’ Fijian concepts of different places' distinct custodianships. Over the last two centuries, the gift of firewalking has transmuted itself into a sociocultural tool that has consistently indigenized the power of the foreign. The gift of firewalking has allowed its custodians to locally sustain their community, to gain a reach and respect across the nation and beyond, and to intensify the group's social sentiment and social capital.     

Identification of a chrysocolla amulet in an Early Dynastic child mummy

Two pyriform formations were identified within a bundle of linen bandages wrapping a 15–18 months old Early Dynastic mummy. The upper one was taken out of the bandages and examined to ascertain its nature.     

Report on the first research campaign on the Napoleonic brick, Mercure, wrecked off Lignano, Udine, Italy in 1812

During 2001, the NAUSICAA office organized a research campaign on the site where two carronades had been retrieved by a fishing boat. Side-scan sonar research led to the discovery of a mound and six more carronades. The mound was composed of iron ingots, cannon balls, and tools reused as ballast. After the cleaning of a carronade, it was possible to read the name of the foundry, Du Creusot , and the date, 1806. This evidence was sufficient to identify this as the wreck of the Napoleonic brick, Mercure , lost during the Battle of Grado, fought between an English and French fleet in February 1812.     

The Rigging and the 'Hydraulic System' of the Roman Wreck at Grado, Gorizia, Italy

The hull of the Roman wreck at Grado has been preserved under the cargo of amphoras. On the site, a lot of wooden elements of the rigging are preserved, including deadeyes, blocks, and toggles. Three possible bitts were identified, one of them sculpted; two were nailed to the hull while one was loose. Near the keel a lead tube, protected by a wooden box, has been interpreted as a bilge-pump but more probably it was a suction-pump. The tube would have been connected to a piston pump which has not survived. Possible explanations for its use are presented.
© 2005 The Nautical Archaeology Society     

Interdisciplinary approach for reconstructing an alder-based historical agricultural practice of the Eastern Ligurian Apennines (NW Italy)

Data from four soil profiles studied through pollen and macroscopic charcoal analyses were used to identify specific palynological assemblages associated with a traditional land-use system documented in the Eastern Ligurian Apennines (NW Italy) between the 18th and early 20th century, concerning a cyclical use of grey alder plots for temporary cultivations involving to the use of controlled fire. This is the first attempt to verify on palynological evidence some hypotheses raised by previous historical ecology studies about the consequences of this agricultural practice (recently named alnocoltura) on past and present vegetation. Our investigations underline (1) high percentages of anthropogenic pollen indicators, (2) increase of Ericaceae percentages, (3) low pollen percentages of Alnus, (4) high macrocharcoal concentrations and (5) high values of palynological richness during periods affected by the alnocoltura cycle according to the historical sources. Similar patterns are also detectable in pollen diagrams from two adjacent peat bogs. The paper shows the strength of an interdisciplinary methodology (field observations, cartographical and archival historical data, palynological and archaeological investigations) for studies of past land-use systems. By demonstrating the necessity of a long-term prospective in environmental reconstructions for the preservation of the cultural landscape, one of the important elements of this research is its potential contribution to issues of habitat management and nature-conservation policy. Further analyses are needed to test the replicability and reliability of the hypotheses derived from this study.     

Masonry Italian Code-Conforming Buildings. Part 1: Case Studies and Design Methods

ABSTRACT

Several architectural configurations of unreinforced masonry residential buildings are designed according to the different methods proposed in the Italian code: rules for the so-called simple masonry buildings, linear and nonlinear static analyses. Always complying with code requirements, for each building-site combination, the design was made, as much as possible, without an excessive margin of safety. The different design methods provided buildings with very different levels of safety, being linear static analysis largely overconservative with respect to the nonlinear static approach. These buildings were then analyzed in the companion paper.