An Overview of Optimal Damper Placement Methods in Structures

Stiffening effects-controlling sizing procedure of ADAS dampers in seismic retrofit of frame structures

“…Based on these total numbers of plates, the final design of the protective system is carried out by: 1) selecting the vertical alignments where the dissipative braces are to be inserted, and 2) distributing the plates in elevation along the storeys. In order to minimize the architectural impact of the intervention on the interiors of the building (Martinez-Romero, 1993;Mazza, 2014), as well as to increase the torsional stiffness of the building in plan (Terenzi et al, 2020;Kookalani et al, 2022), the following 16 (8 in X and 8 in Y) alignments are chosen, as highlighted in Figure 7: 1/A-2/ A, 2/A-3/A, 4/A-5/A, 5/A-6/A, 1/D-2/D, 2/D-3/D, 4/D-5/D, 5/D-6/ D, in X; and 1/A-1/B, 1/C-1/D, 3/A-3/B, 3/C-3/D, 4/A-4/B, 4/C-4/ D, 6/A-6/B, 6/C-6/D, in Y. Among these alignments, 12 are situated on the building perimeter, two on the stairwell perimeter and two in the interiors (3/A-3/B, 4/A-4/B).…”

Dynamics of Structures, Frames, and Plates with Viscoelastic Dampers or Layers: A Literature Review

“…Usually, the chosen combination of parameters and location for VE dampers is considered optimal when the effectiveness in mitigating earthquake-or wind-induced vibrations is best. However, the parameters that define this effectiveness can vary and, depending on the type of structure, one can use displacement values, inter-story drifts, internal force values or accelerations [369]. Consequently, different optimization strategies and different objective functions are adopted [370]: maximum inter-story drifts, the sum of inter-story drifts [371][372][373], absolute acceleration [374], displacement [374,375], base shear [374], an energy-based damage index [376], and base moments [377], as well as the combinations of some structural performance functions; see Figure 8.…”

“…The following examples of methods belonging to the second group of analytical approaches [369] can be considered: gradient-based algorithm (GBA) [370,382], inverse problem approach (IPA) [372], steepest direction search algorithm (SDSA) [383], and fully stressed design algorithm (FSDA) [384].…”

“…The performance indicator of FSDA is the inter-story drift, which is the main limitation of this method. The advantage is that it takes into account the variability of earthquake data [369].…”