Passive Control Techniques for Retrofitting of Existing Structures

Palmeri, Alessandro

doi:10.1007/978-3-642-35344-4_212

Cited by 2 publications

(1 citation statement)

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“…In this respect, 2 major strategies may be considered: (1) strengthening, ie, increasing the capacity of the structural members and/or (2) reducing the seismic demand, eg, with the installation of seismic protective devices, such as dampers and isolators (see, for instance, previous studies [2][3][4][5][6][7][8] ). In certain cases, the former strategy could be more convenient for relatively small-sized buildings, whereas the latter tends to be more advantageous for large structures, including key infrastructural facilities (eg, schools, university buildings, and hospitals), so to keep to a minimum any service interruption (although seismic dampers can be effective and cost-efficient also for retrofitting low-rise buildings, see, eg, Benavent-Climent et al 9 ).…”

Section: Introductionmentioning

confidence: 99%

Seismic performance of buildings retrofitted with nonlinear viscous dampers and adjacent reaction towers

Impollonia

Palmeri

2018

Earthq Engng Struct Dyn

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Summary An effective strategy of seismic retrofitting consists of installing nonlinear viscous dampers between the existing building, with insufficient lateral resistance, and some auxiliary towers, specially designed and erected as reaction structures. This allows improving the seismic performance of the existing building without any major alteration to its structural and nonstructural elements, which makes this approach particularly appealing for buildings with heritage value. In this paper, the nonlinear governing equations of the coupled lateral‐torsional seismic motion are derived from first principles for the general case of a multistory building connected at various locations in plan and in elevation to an arbitrary number of multistory towers. This formulation is then used to assess the performance of the proposed retrofitting strategy for a real case study, namely, a 5‐story student hall of residence in the city of Messina, Italy. The results of extensive time‐history analyses highlight the key design considerations associated with the stiffness of the reaction towers and the mechanical parameters of the nonlinear viscous dampers, confirming the validity of this approach.

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