Fvd for no limits 2
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2008) and the Iidabashi First Building (Zhang et al.
![fvd for no limits 2 fvd for no limits 2](https://i.ytimg.com/vi/yYPPCc2o-mI/maxresdefault.jpg)
Some examples of inter-storey isolation are as follows: the Shiodome Sumitomo Building (Tasaka et al. Furthermore, the isolation at the base becomes less effective than that between storeys for tall buildings, due to their low bending stiffness (Ziyaeifar et al. This technique can also be applied to add extra storeys on the top of existing buildings (with appropriate vertical capacity), without increasing the base shear forces, which represent an innovative retrofitting approach (Zhou 2001 Chey et al. For example, installing base isolation in existing buildings is generally complicated and certainly more expensive than applying isolation between storeys (often disruption-free).
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Additionally, in some cases, the base isolation of buildings encounters economic and technical issues that can prevent its application. This represents both an advantage for architectural design and a sustainable solution for densely populated areas (such as China), as it allows significant savings on land use, e.g., by realising residential buildings on top of commercial buildings. First, it allows for greater freedom in the structural conception of skyscrapers and multi-purpose buildings, defining two independent structures, i.e., substructure and superstructure, which may have different forms, materials and uses (Zhang et al. Seismic isolation between building storeys is becoming an increasingly attractive concept. Finally, prediction models of optimal FVD parameters are provided based on the results obtained and are applied to three case studies as an example. This method is applied to a stock of regular structures with various vibration periods of superstructure, isolation and substructure, examining a linear and a non-linear isolation system and a set of natural records, in order to comprehensively assess the effects of FVDs and their non-linearity on the seismic performance of these structures. In particular, the optimal FVD parameters are provided in a dimensionless form, so that they can be predicted by design equations of general validity within the range of the structures analysed. Therefore, this paper proposes a method for the optimal multi-objective design of FVDs, based on the definition of appropriate surrogate response models, which allows for rationally comparing the FVD effects for a wide range of dampers and structures.
![fvd for no limits 2 fvd for no limits 2](https://i.ytimg.com/vi/cL_nuN12-4k/maxresdefault.jpg)
Additionally, the effectiveness of FVDs for inter-storey applications was investigated only recently, and specific approaches for their optimisation and performance evaluation are missing. As shown in some studies, fluid viscous dampers (FVDs) mounted in isolation systems are effective in reducing isolator deflection but can be harmful by amplifying inter-storey drifts and floor accelerations. One of the main related issues is the need to limit the relative displacement between substructure and superstructure, while maintaining a good seismic performance of the superstructure. Inter-storey seismic isolation is increasingly gaining attention.