Estimation of the Displacement of Viscously Damped Pinching Hysteretic Structures Subjected to Near-fault Ground Motions

To fulfill a displacement-based design or response prediction for nonlinear structures, the concept of equivalent linearization is usually applied, and the key issue is to derive the equivalent parameters considering the characteristics of hysteretic model, ductility level, and input ground motions. Pinching hysteretic structures subjected to dynamic loading exhibit hysteresis with degraded stiffness and strength and thus reduced energy dissipation. In case of excitation of near-fault earthquake ground motions, the energy dissipation is further limited due to the short duration of vibration. In order to improve the energy dissipation capability, viscous-type dampers have been advantageously incorporated into these types of structures. Against the viscously damped pinching hysteretic structure under the excitation of near-fault ground motions, this study aims to develop a seismic response estimation method using an equivalent linearization technique. The energy dissipation of various hysteretic cycles, including stationary hysteretic cycle, amplitude expansion cycle, and amplitude reduction cycle, is investigated, and empirical formulas for the equivalent damping ratio is proposed. A damping modification factor that accounts for the near-fault effect is introduced and expanded to ensure its applicability to structures with damping ratios less than 5%. An approach for estimating the maximum displacement of a viscously damped pinching hysteretic structure, in which the pinching hysteretic effect of a structure and the near-fault effect of ground motions are considered, is developed. A time history analysis of an extensive range of structural parameters is performed. The results confirm that the proposed approach can be applied to estimate the maximum displacement of a viscously damped pinching hysteretic structure that is subjected to near-fault ground motions.     

Introduction: film policy in a globalised cultural economy

This special issue on ‘Film Policy in a Globalised Cultural Economy’ is devoted to the changing economic and technological context in which filmmaking occurs, the policy responses that these changes have generated and their consequences for the pursuit of cultural objectives. The issue offers discussions of the general economic, technological and political shifts shaping the global film industry as well as case-studies examining the specific policies adopted by different states. While these indicate how governments have been obliged to respond to the economic and technological changes wrought by globalisation they also highlight the variations in approach to film policy and the continuation of tensions between economic and cultural, and public and private, objectives.     

Analysis of Carbon Fiber Sheet-Retrofitted RC Bridge Columns Under Lateral Cyclic Loading

In recent years, the use of carbon fiber sheet (CFS) to provide lateral confinement for enhanced ductility and strength of reinforced concrete bridge columns has been increasing. While the monotonic behavior of CFS-confined concrete has been studied extensively, its cyclic response has not been fully understood. Most of the available studies are experimental investigations, hence there is a need to develop an analytical model to simulate the experimental results. Analysis of the hysteretic behavior of CFS-retrofitted circular columns is presented in this article using the fiber element that is based on cyclic constitutive models of longitudinal reinforcement and concrete confined by both CFS and tie reinforcement. The analysis was verified based on available cyclic test data and the analysis provides good agreement with the experimental results. Results show that flexural strength and ductility of columns wrapped with CFS increases as CFS ratio increases. However, as tie reinforcement ratio increases, there is no much difference on the hysteretic response for low tie reinforcement ratios. Using the fiber element analysis, the effect of CFS retrofit on the seismic response of a 7.5 m tall prototype pier built in the 1970s to 1980s is also clarified.     

Are the global media and entertainment conglomerates having an impact on cultural diversity? A critical assessment of the argument in the case of the film industry

This paper critically examines the dominant discourse on the global media and its impact on cultural diversity. The term cultural diversity suffers from the lack of good definition and criteria to assess its degree and change over time in specific markets. The paper also argues from an economic perspective that the distinctive economic features of the film business has led to market concentration, which, however, is ‘natural’ and does not trigger the application of competition law to rectify it. A particular problem is the assumed link between the market structure and its performance, which is not definitively supported by theory or empirical research. It is argued that the discussion in the media and entertainment studies literature is sometimes based on flawed reasoning and insufficient evidence. It is suggested that we start with the important discussion on what state of cultural diversity cultural policy should strive to achieve.     

A European political-economic space that embraced Japan: the international context of the conventional-tariff network,ca.1892–1914

This article sheds new light on the economic globalization in Europe and Asia from the late nineteenth to the early twentieth centuries, with a special focus on the role of bilateral commercial treaties and import tariffs. Countries concluded a number of treaties in those days, and they came to form an extensive ‘conventional-tariff network’. This mechanism contributed to the stabilization of international economic-political space by facilitating reciprocal tariff concessions. The extent of this conventional-tariff network was both temporally and geographically larger than has been assumed. First, as the recent scholarship has shown, the network, which emerged in the 1860s, survived the political turbulence of the 1890s and spanned Central European countries such as Germany and Italy by the early 1910s. Second, the network spread outside Europe and reached East Asia by the 1910s, when Japan renegotiated its commercial treaties and became a new member of the network. The network embodied so strong a mechanism of self-maintenance based on the coordination of economic interests that it was resilient to a major political shock such as the First World War. While the tariff systems in Europe and in East Asia around 1900 have been separately discussed in the literature, this paper focuses on the treaty partnership between these two areas to show how the mechanism of the conventional-tariff network enabled the countries to cooperate for mutual concessions on international trade.