SEISMIC ENERGY DEMAND IN STEEL MOMENT FRAMES

The present paper investigates the seismic energy demand in steel moment-resisting frames. The frames, with 3, 6 and 10 storeys, and 4 and 8 spans, are designed according to current seismic code provisions. The energy response (energy quantities and their distributions) in the frames subjected to an ensemble of six earthquake ground motions recorded on different soil conditions, is investigated by nonlinear time history analysis. The study concludes that (1) the results of energy response can be developed into a rational method of seismic evaluation and design for steel moment-resisting frames; (2) the energy concept based on the single-degree-of-freedom has limitations when extended to the realistic structural system for design purposes; and (3) it is necessary to develop the energy-based approach for seismic evaluation and design based on the seismic response of a realistic multi-degree-of-freedom structural system.     

The Effect of Accelerated Alteration on the Discrimination between Baltic and Romanian Amber

Ten geological samples (five from each source—Romanian amber and Baltic amber) in duplicate for five different media (air, water, saline, acid and basic) were subjected to thermal alteration at 80 ± 2°C for 12 weeks, in the dark. The samples were analysed before and after the accelerated alteration experiment by Fourier transform infrared spectroscopy, both in transmittance and reflectance mode, and the acquired spectra were statistically processed by multivariate data analysis, mainly using principal component analysis. The results of the experiment are useful in giving a better picture of how to discriminate between archaeological amber artefacts.     

Environmental Quality and User Satisfaction in Mass Housing Areas: The Case of Istanbul

In a residence environment, housing and housing groups constitute a fundamental life space to meet the needs of the residents, to satisfy them, and to maintain the overall health of individuals and public. Various needs that appear due to the problems caused by housing and residence environment situated in a physical, psychological and socio-cultural environment together with their surroundings affect resident satisfaction and attitude, while directing the overall individual/family and public health, happiness and welfare. Most researchers argue about and try to determine the residents' needs related to their expectations of and satisfaction in housing and residence environment, within the framework of basic needs of human beings. In this study, in order to assess the factors that improve housing and environmental quality satisfaction, the concepts of housing and its environment, and the subject of housing and environmental quality satisfaction have been investigated; the conceptual model of housing and environmental quality satisfaction has been developed, which takes up the subject of user satisfaction in housing and environment quality as a whole; and the factors to increase the level of satisfaction in housing and environmental quality have been specified. A sum of 400 questionnaire inquiries has been made in planned mass housing areas in the Istanbul Metropolitan Area. Applying factor analysis to the data that have been gathered as a result of questionnaire inquiries, the following factors have been determined according to their order of importance to increase the level of user satisfaction in housing and environmental quality. The findings of this study show that, the elements influencing these factor groups include accessibility to various function areas in the inhabited housing area, environmental features of the housing, satisfaction in the various facilities in the inhabited environment, environmental security, neighbour relationships, and the appearance of the housing environment. A logistic regression model has been made to assess whether there are any differences among the factors influencing housing and environmental quality satisfaction for mass housing users on location choice (central districts and peripheral districts) at the metropolitan level.     

Nonlinear Structural Performance of a Historical Brick Masonry Inverted Dome

ABSTRACT

Traditional domes are obtained by double curvature shells, which can be rotationally formed by any curved geometrical plane figure rotating about a central vertical axis. They are self-supported and stabilized by the force of gravity acting on their weight to hold them in compression. However, the behavior of inverted domes is different since the dome is downward and masonry inverted domes and their structural behaviors in the literature received limited attention. This article presents a nonlinear finite element analysis of historical brick masonry inverted domes under static and seismic loads. The brick masonry inverted dome in the tomb of scholar Ahmed-El Cezeri, town of Cizre, Turkey, constructed in 1508 is selected as an application. First, a detailed literature review on the masonry domes is given and the selected inverted dome is described briefly. 3D solid and continuum finite element models of the inverted masonry dome are obtained from the surveys. An isotropic Concrete Damage Plasticity (CDP) material model adjusted to masonry structures with the same tensile strength assumed along the parallel and meridian directions of the inverted dome is considered. The nonlinear static analyses and a parametric study by changing the mechanical properties of the brick unit of the inverted masonry dome are performed under gravity loads. The acceleration records of vertical and horizontal components of May 1, 2003 Bingöl earthquake (Mw = 6.4), Turkey, occurred near the region, are chosen for the nonlinear seismic analyses. Nonlinear step by step seismic analyses of the inverted dome are implemented under the vertical and horizontal components of the earthquake, separately. Static modal and seismic responses of the inverted masonry dome are evaluated using mode shapes, minimum and maximum principal strains and stresses, and damage propagations.     

Towards an encompassing perspective on nationalisms: the case of Jews in Turkey during the Second World War, 1939–45

ABSTRACT. This article focuses on the plight of the Jews in Turkey during the Second World War, with the intention of analysing specific historical events through the lenses of leading theories of nationalism. First we review recent developments in historiography that contribute the framework for understanding both the hermeneutical possibilities and limitations when addressing historical texts. Then we employ three theories of nationalism – the ethno‐symbolist, instrumentalist and social constructivist – as a means of analysing and interpreting the historical events of the Jewish predicament vis‐à‐vis the Republic of Turkey. We conclude by suggesting what impact our findings may have on the narratives from this time period, and the way in which we can understand narratives today.     

THE ONTOLOGY OF CAPITAL: ON THE SHARED METHODOLOGICAL LIMITS OF MODERNIZATION THEORY AND ITS CRITICS

This article argues that critical scholarship in historical studies has not overcome the methodological limits of modernization theory for failing to question the ontological principles that construct its object of analysis. I call these principles the “ontology of capital” and explicate them through Bourdieu's conceptualization of the field and capital. I argue that this ontology is established according to a distribution model in which social entities come into the analysis with the amount and value of the capital they hold. This model grasps all social relations in the form of competition, and actors and actions enter into the analysis only when they are involved in such relations. I then analyze Bernard Lewis's The Emergence of Modern Turkey, which is written explicitly from a modernization perspective, to show how the principles of the “ontology of capital” operate in this text. The analysis focuses on how sociohistorical facts are constructed through selection and articulation of empirical evidence that become meaningful only on the basis of this ontology. The aim of this analysis is to show the ontology of capital that constructs the object of analysis in Lewis's text rather than the Eurocentric, teleological, and elitist character of his analysis of history that critics in recent decades have addressed as problems of the modernization paradigm. Based on this, I argue that for a productive critical approach, relational analysis, which characterizes critical scholarship in contrast to essentialism, also has to consider the ontological principles in a historical work to overcome methodological limits. The failure to interrogate this ontology leads to an analytical separation in critical scholarship between the analysis of historical reality and of alternatives to this reality. This separation not only produces a dehistoricized analysis of the present from a critical perspective, but also turns the alternatives into utopian models.     

An archaeometric study of the Konya basin metallic ware through FTIR and XRD analysis with chemometrics: Central Anatolian Early Bronze Age ceramics

Fourier-transform infrared, X-ray diffraction and chemometrics were used to characterize the mineralogical composition and firing conditions of 59 Early Bronze Age ceramic sherds from the Konya Plain (Turkey). These include the Konya Basin Metallic Ware (KBMW) and a control group of contemporary local products. The analysis indicates significant differences in mineral inclusions and firing temperatures, with KBMW generally being fired above 800°C and characterized by standardized fabric recipes. Assessed together with other published evidence, these results indicate a high degree of specialization in the production of KBMW ceramic assemblages in central Anatolia during the third millennium BCE.