A High-Performance Quadrilateral Flat Shell Element for Seismic Collapse Simulation of Tall Buildings and Its Implementation in OpenSees

Shear walls are important lateral force-resistant components of tall buildings. Hence, a reliable numerical model that can accurately represent the mechanical characteristics and large deformations of shear walls is critical for realistic collapse simulation of tall buildings. Based on the theory of generalized conforming element, a high-performance quadrilateral flat shell element, NLDKGQ, accounting for the large deformation using the updated Lagrangian formulation, is proposed herein and implemented in OpenSees. The reliability of NLDKGQ is validated using classical benchmark problems and reinforced concrete specimens. In addition, its capability in simulating the collapse of a tall building is also demonstrated.     

Modelling Resource Values and Climate Change Impacts to Set Preservation and Research Priorities

ABSTRACT

Climate change impacts will increase in their frequency and severity in the coming decades, resulting in compromised integrity or destruction of thousands of heritage resources. Efforts are needed to identify, record, and study resources that will be affected. To set research and preservation priorities, the vulnerability of resources to climate change impacts and their importance to scientific research, preservation, and other resource values needs to be understood. We advocate a modelling approach which predicts the location, timing, and severity of climate change impacts; identifies resources at risk, their resource values, and opportunity costs; and prioritises research and preservation options based on these assessments. The need for this approach is illustrated with examples from two coastal areas subject to different impacts and hosting different types of heritage resources: the Atlantic coast of Georgia in the United States and the Wismar Bight along the Baltic Sea in northern Germany.     

Space,time and history in the Polish People’s Republic: the trilogy Sami swoi,Nie ma mocnych,Kochaj albo rzuć

Abstract

The article discusses the meanings of popular culture, authenticity and history in People’s Republic of Poland. As an example it uses a popular film trilogy. The trilogy Sami swoi, Nie ma mocnych and Kochaj albo rzu? (‘All friends here’, ‘Take it easy’ and ‘Love or leave me’) was shown in Polish cinemas between 1967 and 1977. The reviews were written just after the premières. The article uses the concepts of time and space elaborated by Mikhail Bakhtin and Doreen Massey to analyze the different chronotopes of the films. It analyses both the films and the reviews as strategies of creating authenticity and creating cultural meanings: the meaning of history and the meanings of rurality. I will show how history and present, memory and society are interwoven in the light of popular production. In addition, I will emphasize the diverse interpretation possibilities resulting from this micro-historical view and the transnational critique of modernism highlighting the small and local which emerged throughout Europe in the 1970s.     

Views,use and reception of visualisations of development proposals impacting cultural heritage

Visualisations of land-use projects have become an important part of the planning process. Using a survey of heritage professionals’ attitudes towards visualisations as a starting point, this article addresses tensions between the expressed usefulness of visualisations and critical attitudes towards the lack of ‘objectivity’ of visual representation and the risk of manipulation for strategic purposes. Moving from the survey, the article discusses how visual representations of development proposals became part of a Norwegian public dispute over the expansion of a shopping centre in a historic town. Furthermore, our aim is to introduce a social semiotic approach for analysing visualisations at historic sites. Finally, we discuss some theoretical implications of negotiating visualisations, with emphasis on the recent debate about representational and non-representational theories in heritage studies.     

Clamming Up: An Ethnoarchaeological Study of a Costa Rican Artisanal Clam Fishery

A vibrant artisanal fishery of the brackish water marsh clam (Polymesoda acuta) is located in the lower Río Tempisque, Costa Rica. Fishermen harvest clams from shoals according to tidal and lunar cycles. They take most clams directly to riverside processing stations to be cooked and sold as salted meat, although some cooked clams are dried, and others sold live. Processing activities result in the formation of shellmounds that share significant similarities and some differences with ancient marsh clam shellmounds of coastal Chiapas, Mexico. In this study, procurement and processing activities are described and quantified, revealing the substantial amount of labor and skill involved in the modern fishery. Implications for archaeological preservation and predictions from optimal foraging theory are evaluated.     

The Colour Purple? Reconsidering the Greek Word halourgos (ἁλουργός) and its Relation to Ancient Textiles

The aim of the present article is to reconsider the interpretation of the Greek word halourgos (?λουργ??) and its relation to textiles and purple dye by reinvestigating its recordings in Greek epigraphy and the papyri, as well as comparative examples from Greek literary sources, in the period from the fourth century bc to the seventh century ad — thus combining the source material from ancient Greece and the Greek-speaking part of the Roman world. This will illustrate the wealth of information one can get from the exploration of one single word: not only on the significance and appearance of textiles and garments in the ancient world from Greece to Egypt, but also on the diversity of colours and the subtleties in their use and terminology.     

The church as colonist: the benedictine abbey of Lorsch and planned Waldhufen colonization in the Odenwald

It is still uncertain whether earlier Waldhufen row settlements with single strip farms in the west of Germany served as models for this type of village, so widely diffused in east central Europe from the twelfth to the fourteenth centuries. In the Odenwald hills Waldhufen settlements were introduced as early as the late eighth century when the imperial monastery of Lorsch started to colonize a royal forest donated by Charlemagne. At first the abbey founded a small Waldhufe for dependent peasants of the manorial villicatio system, but later an enlarged version of strip farms incorporating large portions of forest—the classical Waldhufe—was developed by economically more independent farmers. Also a systematic network of central places in the form of villicatio centres and castle settlements was established within the colonization area. From the Lorsch colonies the diffusion of the Waldhufen settlement model can be traced to the neighbouring Spessart and to the distant Black Forest through personal contacts of territorial lords with Lorsch. Similar connections to one of the leading colonists in the Frankenwald may have brought the idea even to the east central European Waldhufen region in the early twelfth century.