Search results for "Snap back"
showing 2 items of 2 documents
Strategies of Identification of a Base-Isolated Hospital Building by Coupled Quasi-Static and Snap-Back Tests
2020
In this paper, the description of a series of quasi-static pushing tests and dynamic snap-back tests is proposed, involving the base-isolated emergency building of the Palermo university hospital. The base isolation system is characterized by a set of double-curved friction pendulum isolators placed on the top of the columns of the underground level, characteristics that cannot be found in the experimental studies available in the literature. The aim of the work was to investigate the static and dynamic properties of the building in question and comparing the in-situ results with the characteristics assigned during the design process and to assess the level of agreement. Static lateral push…
“If you compress the spring, it will snap back hard”: The Ukrainian crisis and the balance of threat theory
2014
The narrative of an aggressive and neo-imperialist Russia that has dominated analyses of the 2014 Ukrainian crisis lacks theoretical rigour. We argue that a sustainable transformation of the Ukrainian crisis requires an accurate analysis of the context of the conflict, which should include an understanding of Moscow’s perception of the threats to its interests. This policy brief develops a theoretical understanding of the Ukrainian crisis through the lens of Stephen M. Walt’s balance of threat theory. We conclude that a realist analysis will help to explain Russian actions.