Fig.1

Schematic diagram of the stiffness-enhanced damper"

Table 1

Specimen sizes of stiffness enhanced dampers"

Fig.2

Construction and size of specimens （unit：mm）"

Fig.3

Physical view of the specimens"

Table 2

Test results of mechanical properties of materials"

Fig.4

Test setup"

Fig.5

Plane outer limit device"

Fig.6

Time history of loading"

Fig.7

Strain gauge （strain rosette） arrangement"

Fig.8

Displacement meter setting"

Table 3

Relative displacement of the upper and lower connection plates at the point of yielding"

Fig.9

Failure form of specimens"

Table 4

Experimental data of the specimens"

Fig.10

Hysteretic curve"

Fig.11

Skeleton curve"

Fig.12

Equivalent viscous damping ratio"

Fig.13

Finite element model of specimen T1 and T4"

Fig.14

Comparison of hysteresis curves between test and simulation"

Fig.15

Development process of equivalent plastic strain of specimen T1"

Fig.16

Calculation diagram of elastic stage of constrained U-shaped bending plate"

Fig.17

Calculation diagram of rectangular shear plate"

Fig.18

Restoring model"

Fig.19

Comparison between experimental skeleton curve and bilinear restoring force model"

Fig.20

Reinforcement of shear wall and coupling beam"

Table 5

Dimensions for stiffness-enhanced damper"

Fig.21

Elevation and structural model of 12-storey coupling wall"

Fig.22

Maximum inter-storey displacement angle of the structure under frequent earthquakes"

Fig.23

Maximum inter-story displacement angle of the structure under fortification earthquakes"

Fig.24

Maximum inter-story displacement angle of structures under extremely rare earthquakes"

Fig.25

Residual deformation of structure under extremely rare earthquakes"

Table 6

DCF values of the structure"