Apostolos Koukouselis, Konstantinos Chatziioannou, Euripidis Mistakidis and Vanessa Katsardi
The design of compliant towers in deep waters is greatly affected by their dynamic response to wave loads as well as by the geometrical and material nonlinearities that appear. In…
Abstract
Purpose
The design of compliant towers in deep waters is greatly affected by their dynamic response to wave loads as well as by the geometrical and material nonlinearities that appear. In general, a nonlinear time history dynamic analysis is the most appropriate one to be applied to capture the exact response of the structure under wave loading. However, this type of analysis is complex and time-consuming. This paper aims to develop a simplified methodology, which can adequately approximate the maximum response yielded by a dynamic analysis by means of a static analysis.
Design/methodology/approach
Various types of time history dynamic analysis are first applied on a detailed structural model, ranging from linear to fully nonlinear, that are used as reference solutions. In the sequel, a simplified analysis model is formulated, capable of reproducing the response of the entire structure with significantly reduced computational cost. In the next stage, this model is used to obtain the linear and nonlinear response spectra of the structure. Finally, these spectra are used to formulate a simplified design approach, based on equivalent static loads.
Findings
This simplified design approach produces good results in cases that the response is mainly governed by the first eigenmode, which is the case when compliant towers are considered.
Originality/value
The present paper borrows ideas from the area of earthquake engineering, where simplified methodologies can be used for the design of a certain class of structures. However, the development of a simplified methodology for the approximation of the dynamic behavior of offshore structures under wave loading is a much more complex problem, which, to the authors’ knowledge, has not been addressed till now.
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Evgenia Bitsani and Androniki Kavoura
The present paper is part of a study associated with the migration phenomenon and the formation of intercultural social and economic relations which emerged in Italy in the…
Abstract
Purpose
The present paper is part of a study associated with the migration phenomenon and the formation of intercultural social and economic relations which emerged in Italy in the nineteenth century and its practical and social implications in the twenty‐first century. The city of Trieste, Italy consists of a case study which examines the formation of organizational networks in the Mediterranean and in Europe which consist of the basic body of the so called Greek commercial dispersion.
Design/methodology/approach
This study presents data collected from the analysis of archival documents. It is part of the scientific field of social anthropology and is a case study where participative observation was employed. Interviews with people offered the researchers ground to explain the purposes and reasons for the implementation of decisions related to the creation of the organizational networks.
Findings
The article discusses the relation between the national group with its unique cultural identity and entrepreneurship, emphasizing the cultural characteristics of such relation. The consequences from the existence of these networks in all sectors of the life of the community of these areas are investigated. To a third level of discussion, the mapping and analysis of the cultural interactions which emerged as a result of these networks shaping an integrated cultural identity is examined.
Originality/value
The project succeeds in making a theoretical and practical contribution to the way the development of organizational networks presented for Trieste, Italy can consist of a typical recourse for other areas of the Mediterranean where cultures and identities intermingle nowadays and migration and policy directions need to be implemented.