Study and Numerical Analysis on Seismic Performance of Concrete U-Shaped Shear Wall
Table 4
Experimental phenomena of URC-Y.
Observed results
kN
No obvious cracking of specimens
kN
Horizontal cracks appear at the bottom of wall limb 1 and wall limb 2, and the shear wall is in the cracking stage
kN
The steel bars arranged in the wall limbs yield first and the yield stage begins
Δ = 10∼30 mm
Horizontal cracks at the bottom of wall limbs and webs develop upward gradually and become oblique cracks
Δ = 30∼50 mm
The original cracks in wall limb 1 and wall limb 2 become longer and wider and more oblique cracks appear in the middle and upper parts, and develop to the lower part, forming cross cracks. There are fewer new cracks, and the horizontal load reaches its peak.
Δ = 50∼70 mm
The oblique crack of the web intersects with the horizontal crack to form the main crack; the web crack penetrates, the steel bar buckles, the bottom concrete falls off, and the wall limb does not judge the longitudinal reinforcement fracture
