PSI - Issue 64

Massimiliano Ferraioli et al. / Procedia Structural Integrity 64 (2024) 1017–1024 Ferraioli et al./ Structural Integrity Procedia 00 (2019) 000–000

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Table 4. Parameters of the bilinear equivalent SDOF system of endoskeleton ( E )

d p [mm]

d p

V p

V y

d y

K e

*

(E)

(E)

(E)

(E)

(E)

 h

Direction

r (E)

 (E)

[mm]

[kN]

[kN]

[mm]

[kN/mm]

[%]

X Y

100 73.53 912 490 9.15 75 56.82 1413 760 6.86

9.12

0.087 10.93 11.1

18.84 0.086 10.93 11.6

Table 5. Distribution of strength and stiffness of dissipative braces over the height X-Direction Y-Direction

Mass [kN ꞏ s 2 /mm]

F i [kN]

F i [kN]

V y,i [kN]

K i,tot [kN/mm]

K i(HBFX1,2) [kN/mm]

K i(HBFX3,4) [kN/mm]

V y,i [kN]

K i,tot [kN/mm]

K i(HBFY) [kN/mm]

Floor

  

 

2 3 4

0.33231 0.33039 0.26539

0.3067 86

490 304.2

69.8 50.9 29.3

82.3 60.0 34.9

0.3684 146 760 360.3 0.7616 299 615 273.0 1.0000 316 316 240.3

90.1 68.3 60.1

0.6542 182 405 221.6 1.0000 223 223 128.3

Table 6. Type, design strength ( N D ), and stiffness ( K D ) of the HBF dampers, stiffness ( K B ), and type of the braces. HBF1X HBF2X HBF3X= HBF4X HBF5Y, HBF6Y, HBF7Y, HBF8Y Floor N D [kN] K D [kN/mm] K B [kN/mm] Type N D [kN] K D [kN/mm] K B [kN/mm] Type N D [kN] K D [kN/mm] K B [kN/mm] Type N D [kN] K D [kN/mm] K B [kN/mm] Type 2 130 168 234  168,3/12 141 203 264  168,3/12 180 256 357  193,7/16 130 168 234  168,3/12 3 107 154 159  168,3/8 117 168 264  168,3/12 148 203 234  168,3/12 107 154 159  168,3/8 4 60 154 156  168,3/8 66 154 175  168,3/8 83 154 156  168,3/8 60 154 156  168,3/8

a) b) Fig. 6. a) Bilinear idealization of the retrofitted Structure (Step 1) ( S ); b) Bilinear idealization of the Endoskeleton ( E ).

a)

b) Fig. 7. a) Layout of the dissipative braces; b) Front view of the Damped Brace ( DB )