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.     

Building survey forms for heterogeneous urban areas in seismically hazardous zones. Application to the historical center of Valparaíso,Chile

ABSTRACT

Building survey is an essential data-collection procedure to feed large-scale seismic vulnerability assessment. The available strategies usually consider survey forms to gather information about the urban buildings. The application of the available survey forms poses important challenges for the case of the heterogeneous urban centers including different structural typologies. This work proposes four specific survey forms for traditional structural typologies constructed with masonry, reinforced concrete, mixed steel-reinforced concrete, and timber. The proposed forms request essential information on the parameters necessary for seismic vulnerability assessment, by evaluating the lateral-load resistant system, regularity, condition of conservation, and existing damages. The survey forms were applied to the study of 111 buildings of the historical center of Valparaíso, Chile. The proposed methodology was complemented with the use of Geographic Information Systems to obtain a complete database with the structural characterization of the most representative typologies for future works of large-scale seismic vulnerability assessment.     

Envisioning Future Landscapes in the Environmentally Sensitive Areas of Scotland

Environmentally Sensitive Areas (ESAs) designated under EC Structure Regulation 797/85 now cover 1.4 million ha of the Scottish countryside and are likely to make a substantial contribution to the regulation of landscape change. Visual changes to landscapes with (policy on) and without (policy off) the ESA programme in two Scottish ESA areas, Breadalbane and the Machair, are predicted through impact-assessment procedures and computer manipulation of photographic images. The methodological requirements for such predictions are outlined and substantial differences in landscape characteristics under policy on/off scenarios are revealed. Such approaches to landscape change are an essential foundation for the development of environmental cost-benefit analyses and will contribute to public consultation processes.     

Maps and the assessment of parish rates in nineteenth‐century England and Wales

Abstract

This paper reviews the role of maps in the assessment of rates levied for the relief of poverty in nineteenth‐century England and Wales and examines the relationships between tithe maps and parochial assessment maps both in general terms and with specific reference to Poor Law unions in the county of Kent. An appendix lists 207 parochial assessment maps made in connection with the levy of poor rates which are extant in the public archives and libraries of England and Wales. Other ‘lost’ examples of this genre awaiting discovery in parish churches and vestries will undoubtedly add to this small but important constituent of the corpus of English and Welsh cadastral maps.     

Talking about bodies online: Viagra,YouTube, and the politics of public(ized) sexualities

The development of Viagra in the late 1990s ushered in a new age of conversation about sex and sexuality, as men's bodily abilities were put on display for all to discuss. In 2005, the video-sharing technology YouTube was launched. Taken together, these technological innovations – both biomedical and representational – have produced debate around sex, sexualized and gendered bodies, and sexual health. This article interrogates Viagra-related representations posted on YouTube and analyzes sexuopharmaceuticals as a set of intertextualities that create space for both normative discourses and social critiques. Three analytic themes illustrate how Viagra-related YouTube videos (1) reinforce a regime of self-care within a wider context of individualized responsibility for one's sexual health, (2) highlight the values attached to the pharmasexed gendered body for men and women in the age of Viagra, and (3) provide disruptions, in the form of criticism, to the assumption that healthy bodies and relationships need pharmasexual enhancement. The article concludes by suggesting that social networking sites such as YouTube are managed public spaces through which one can interrogate the intertextualities that link discourses related to bodies and sexual health to the virtual and material spaces of everyday life.     

Guidelines for On-Site Assessment of Historic Timber Structures

In the scope of European Cooperation in Science and Technology–Wood Science for Conservation of Cultural Heritage (COST IE0601–WoodCultHer) (available at http://www.woodculther.org) it was agreed to produce Guidelines for the Assessment of Historic Timber Structures, covering the principles and possible approaches for the safety assessment of old timber structures of historical relevance that could be used as the basis for possible European Standards, as discussed with CEN/TC346 (Conservation of Cultural Heritage).

This approach was targeted at all those concerned with the conservation of heritage buildings. These guidelines should also help decision-making regarding the need for immediate safety measures. The aim is to guarantee that inspection and assessment measures provide the necessary data for historical analysis, structural safety assessment, and planning of intervention works, while having minimal impact on the building fabric (the original materials, structural systems, and techniques).This article provides information on the criteria to be used in the assessment of load-bearing timber structures in heritage buildings. It covers the preliminary assessment (desk survey, preliminary visual survey, measured survey, structural analysis, and preliminary report), as well as the detailed survey of timbers (with a special emphasis on visual strength grading on site) and carpentry joints. The subsequent diagnostic report and the detailed design of repairs are outside its scope.     

Shear Vulnerability of Historical Reinforced-Concrete Structures

Modern buildings have been characterized by the rapid spread of reinforced concrete as a novel and versatile building material. Within the assessment of existing buildings, the most sensitive structures are those designed in the first half of the 20th century, when the theory of reinforced concrete and the detailing rules were not yet well established. This study considers the issues related to the gradual understanding of the vulnerability at a territorial scale of structural typologies designed only for vertical loads. In particular, the shear behavior of the buildings in the period between 1920 and 1960 is investigated. The shear strength control of the structural elements of an open-air stadium in Southern Italy is carried on according to Eurocode 2, the American Concrete Institute Code, ACI 318R–2008, and a method based on Arslan’s equation. The results are compared with those included in the original calculus report according to the 1930 Royal Decree-Law (RDL 18/7/1930).     

Analysis of the Out-Of-Plane Seismic Behavior of Unreinforced Masonry: A Literature Review

Although the issue of the out-of-plane response of unreinforced masonry structures under earthquake excitation is well known with consensus among the research community, this issue is simultaneously one of the more complex and most neglected areas on the seismic assessment of existing buildings. Nonetheless, its characterization should be found on the solid knowledge of the phenomenon and on the complete understanding of methodologies currently used to describe it. Based on this assumption, this article presents a general framework on the issue of the out-of-plane performance of unreinforced masonry structures, beginning with a brief introduction to the topic, followed by a compact state of art in which the principal methodologies proposed to assess the out-of-plane behavior of unreinforced masonry structures are presented. Different analytical approaches are presented, namely force and displacement-based, complemented with the presentation of existing numerical tools for the purpose presented above. Moreover, the most relevant experimental campaigns carried out in order to reproduce the phenomenon are reviewed and briefly discussed.     

The ‘Evidence’ of sex,the ‘Truth’ of gender: Shaping children's bodies

This paper is about the body, specifically a child's body, as a site where identity becomes contested. It is also about a surface or space where we lay claim—a site of vested interest. In April 2004, the Australian Family Court ruled that a 13-year-old child (Alex) had gender identity dysphoria and decided to allow reversible hormonal treatment. The Court ruling produced considerable legal, medical and public reflection over whether these decisions were in Alex's best interests, whether Alex was able to make such a decision at his age, and to assess Alex's competency. These debates also aimed to fix sex and gender through the deployment of a nature and nurture framework. The purpose of this paper, using the example of Alex, is to illustrate the various ways that these claims over a child's body, undermine the possibility for rethinking sex and gender.     

Asymmetry and activity-related change in the male humerus

Some previous studies of activity-related change in the human skeleton have been of doubtful validity because specific changes have been related to particular tasks. Claims to establish such relationships have often concentrated on the development of entheses. Such work is marred by the incorrect assumption that muscles work in isolation in the performance of a single activity. In addition, normal skeletal asymmetry is often ignored, as is age and sex. In the present work, paired humeri of males from two medieval British sites, Norwich and Henry VIII's flagship, the Mary Rose, were compared using a series of measurements. Comparison of left and right sides demonstrated that humeral asymmetry decreases with age. Comparison of the sites showed that the Norwich males were more asymmetric than those from the Mary Rose. All asymmetries exhibited a right-sided dominance. The majority of the species is right-handed: the Norwich males followed this trend. The general lack of asymmetry in the Mary Rose males suggests that they were using their arms more equally. When left and right sides were compared directly, a new measurement of the greater tubercle (where three muscles insert) and measurement of the diameter of the head demonstrated that the Mary Rose males had significantly larger dimensions of the left shoulder than the Norwich males. These results extend earlier work, which had suggested a correlation between the use of heavy medieval longbows and os acromiale. Statistical comparison of the sites demonstrated that such work can indicate patterns of activity but not individual occupations.