Modelling and Seismic Response Analysis of Italian Code-Conforming Base-Isolated Buildings

ABSTRACT

This paper reports on results of nonlinear analyses performed within the RINTC project on an RC building isolated with different systems (High Damping Rubber Bearings, High Damping Rubber Bearings and Flat Sliding Bearings, Friction Pendulum System) and designed according to the Italian design code. The seismic response has been evaluated under different seismic input levels of two sites with different hazard and by considering two Limit States: Global Collapse and Usability-Preventing Damage. The influence of seismic stoppers and modelling uncertainties is also evaluated. Results permit to compute the implicit collapse risk and to identify critical aspects of current design procedures.     

Eavesdropper on the Past: John W. Burrow (1935–2009), Intellectual History and Its Future

Summary

Focused on the much-debated historiographical and academic status of intellectual history, this article addresses for the first time and in detail the methodological views of the British historian John Wyon Burrow (1935–2009). Making use both of his published works and of unpublished material left to the University of Sussex Library (including lectures, letters, academic projects and biographical sketches), its goal is to provide a thorough account of an original and eclectic intellectual historian and, at the same time, cast new light on the role of the discipline in the scholarly context of the last few decades in Europe and the US. More specifically, the following pages will illustrate Burrow's work and career, with particular attention being paid to his insistence on narrative, imagination, irony and style; present his writings as an original instance of the anti-methodological practice of intellectual history; and study his opinions of what it means to carry out the métier d'historien. Finally, by examining Burrow's idea of the intellectual historian as a creative ‘eavesdropper’ on the ‘conversations of the past’ and as a ‘translator’ of past dialogues, this article will both pose some central questions and advance some proposals concerning the future of intellectual history.     

Reinforcement of the 18th Century Buttresses of Maniace Castle: Design and Execution

ABSTRACT

Maniace Castle, built on Ortygia island in Siracusa (Italy) in the first half of the 13th century and hosting a magnificent hypostyle hall (the Salone), a square area covered by 25 cross vaults supported by columns, was severely damaged by the 1693 earthquake and the explosion of the ammunition dump in 1704. The buttresses, built immediately afterward to counteract the thrust of the 10 surviving vaults, did not guarantee adequate seismic safety so that a metal scaffolding was installed in 2001 to prevent an overturning mechanism. This article discusses the design and execution of an external pre-stressing steel system to increase existing buttress strength and the seismic capacity of the Salone, starting with historical and constructional analyses and dealing with both analytical and technical aspects. The monitoring system installed to detect structural response during and after the working execution is shown, along with some of the data acquired so far.     

Power or policy: a comparative study of the cohesion of Italian coalition governments in the First and Second Republics

In the 1990s the Italian political system witnessed momentous changes that have severely impinged upon the country's political parties and party system. What has been the resulting effect on the cohesion of Italian governing coalitions? Has the effect on the nature and workings of governing coalitions been a product of the changing motivations of political parties? This article attempts to tackle the following questions by using the general framework of several formal coalition theories complemented with an analysis of the specific features of the Italian political context.     

Subjectification in Times of Indebtedness and Neoliberal/Austerity Urbanism

How can we analyse the (re)emergence of squatting in relation to the current housing crisis in Italy? Centred on the case of Rome, the paper theorizes this return as resulting from processes of subjectification in the housing sector linked to the raising of indebtedness as a main dispositif of capitalism under neoliberal/austerity urbanism agendas. The political economy‐oriented literature on neoliberal/austerity urbanism is bridged with the post‐Marxist approach of Maurizio Lazzarato. Debt is seen as the archetype of social relations, shaping and controlling subjectivities, making the “work on yourself” essential to the reproduction of (indebted) society. However, given the circular nature of power, indebtedness can be generative of new processes of subjectification aimed at subverting the same power relation. In this sense, the paper operationalizes the conceptualization of Foucauldian subjectification recently proposed by Judith Revel, emphasizing how subjectification always results from (1) an action/gesture and (2) a consequent deconstruction of the identity.     

WHAT TYPE OF HISTORIAN? CONCEPTUAL HISTORY AND THE HISTORY OF CONCEPTS: A COMPLEX LEGACY AND A RECENT CONTRIBUTION

Javier Fernández Sebastián's edited collections of essays, Political Concepts and Time, is both a critical homage to the monumental work of Reinhart Koselleck (1923–2006) and an important contribution to the methodology of history‐writing. Centered on the polysemic nature of concepts, which are read as “‘vehicles for thought’” studied in their pragmatic and communicative applications in society, Political Concepts and Time provides a stimulating analysis of the role, weight, and future of conceptual history. Its thirteen essays offer an account of problems, questions, and debates on the interplay of words and concepts, meaning and historical change, context and discourse. They endeavor to clarify the complicated and perennially unresolved relationship between theory and practice. In order to do so, Fernández Sebastián has assembled a scholarly composite and broadly international group of specialists from a variety of disciplines and research fields. With the intellectual legacy of Koselleck's Begriffsgeschichte looming large, this book rethinks the ways in which not just historians but also social scientists and philosophers study the past as the expression of contingent, ever‐changing, and revocable semantic units shaping the culturally plural worlds we inhabit. Informed by the idea that history is porous, Political Concepts and Time also deals with the perhaps obvious but no less challenging issue of our approach to time as everyday experience and through its representation(s). Together with exploring the volume's specific historical topics, this essay will highlight some of its limitations and, above all, will respond to its criticism of intellectual history. The following pages will thus argue the case for the latter methodological perspective by reflecting on the type of historian it delineates. Claiming that in their investigation of past meanings intellectual historians make use of creative imagination, the essay will suggest that this model of history‐writing leads to a better understanding of multiple sources and that it might ultimately help overcome some of the inconsistencies and often simplistic divisions between various branches of the historiographical tree. In particular, a small proposal to reconcile conceptual and intellectual history will be advanced.     

Post-Tensioned Glulam Beam-Column Joints with Advanced Damping Systems: Testing and Numerical Analysis

This article describes tests investigating a feasible source of passive damping for post-tensioned glue-laminated (glulam) timber structures. This innovative structural system adapts precast concrete PRESSS technology [Priestley et al., 1999] to engineered wood products combining the use of post-tensioned tendons with large timber members. Current testing is aimed at further improvement of the system through additional energy dissipation. Testing has favorably compared glue-laminated timber (not previously implemented in this way) with laminated veneer lumber (LVL) used in New Zealand. After initial benchmark testing with post-tensioning only, a simple, minimally invasive and replaceable type of hysteretic damper was added.     

Transjordan During the Nineteenth Century: Reconsidering the Relation Between Arab Tribes and Christian Religious Communities

The article aims to reconsider the history of Ottoman Transjordan during the second half of the nineteenth century. Istanbul's decision to impose its direct control over this province triggered a process of evolution and change within local political spaces. The traditional balance of power was altered and tribes were forced to accept the authority of the Ottoman Empire. States and tribes were not the only political actors. Christian religious institutions also participated in the dynamics of change. The article reconsiders the history of a Christian village of Transjordan, Madaba, to describe the complex relationship between tribes and Christian religious communities during this period of change and evolution. The section Karak highlights the main aspects that characterized the refoundation of Madaba. In the section The Exodus and the Rebirth of Madaba, the exodus of several Christian tribes from Karak to Madaba is analyzed to explain the overlap and intertwinement between the different cultural horizons and sociopolitical logics of the two actors. The section The Village of Madaba analyzes some episodes of daily life in Madaba to detail the consequences of the interaction between tribes and religious communities. Finally, the functioning of the local sociopolitical space on which the Hashemite emirate was later founded is explained. The religious community‐tribe dyad was, in fact, part of the transition from “the tribe to the state.”     

Seismic History of the Church of San Pietro Di Coppito in L’Aquila

After the terrible 18th-century earthquakes—in L’Aquila in 1703, Lisbon in 1755, and Reggio Calabria in 1783—specific anti-seismic precepts were introduced in the rules of the art of masonry construction. Scrupulously adhered to in the first years after the earthquake, those precepts gradually ceased to be used until they were almost completely forgotten, centuries later, by which time the earthquake had become a distant memory. The church of San Pietro di Coppito, one of the most important churches of L’Aquila, is emblematic of this singular process. Deeply transformed in accordance with new anti-seismic construction techniques after it was particularly badly damaged in the terrible 1703 earthquake, the church was subjected, in the 1970s, to drastic alterations by the Commissioner Mario Moretti, who demolished all the baroque additions and redesigned it in the “medieval Abruzzo” style, eliminating in the process the intelligent anti-seismic provisions introduced in the 18th century. In addition to documentary purposes, this work aims to underline the effectiveness of this early 18th-century example of anti-seismic engineering in the belief that the constructive solutions it employed could still form a valid architectural and structural model in view of the massive restoration task for which, unfortunately, L’Aquila is still waiting today.