Pseudodynamic Testing of Buildings Retrofitted with External Steel Reinforced Concrete Frames to Increase Lateral Strength for Earthquake Damage Prevention
Table 6
Comparison among specimens of response strength, response displacement, and degree of earthquake damage following pseudodynamic testing.
Specimen
Input earthquake intensity (gal)
Maximum response strength and strength ratio (kN)
Response displacement at the maximum point Δmax (mm)
Failure mode
Degree of earthquake damage
PD-RC
250
305
11.9
Shear crack
Heavy damage
300
310
16.7
Shear failure
Collapse
PD-WERCF
300
362 (1.17 = 362/310)
9.0
Shear crack
Slight damage
375
472 (1.52 = 472/310)
21.1
Light damage
450
489 (1.58 = 489/310)
26.1
Moderate damage
PD-BERCF
300
381 (1.22 = 381/310)
9.1
Shear crack
Slight damage
375
435 (1.40 = 435/310)
23.6
Light damage
450
493 (1.59 = 493/310)
23.0
Moderate damage
Strength ratio is the maximum response strength of a specimen strengthened with ESRCF at each earthquake intensity level relative to that of the control specimen at 300 gal. The degree of earthquake damage was estimated based on results reported by JBDPA [23] and Maeda et al. [11].
