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Problem # 3: A column shown is reinforced with 8-32mm dia. bars, with a clear concrete cover of 40mm for the 12 mm dia. ties. Due to reversal of lateral forces, the design axial load due to reversal effect of DL, LL and WL changes as follows. Use =1.0 for normal weight concrete. fc'=28 MPa, fy=415MPa. Along the positive x-direction: Mu = -420 kN. m Vu = 370 kN Nu = 1320 kN Along the negative x-direction: d-532 My = +420 kN. m Ty Vu = 370 kN Nu = 450 kN 8. Determine the concrete shear strength for 400 X positive x-direction using simplified mm calculations. (3 points) a. 217.06 kN b. 266.63 kN c. 271.14 kN d. 296.63 kN 600, mm 9. Determine the concrete shear strength for negative x-direction using simplified calculations. (3 points) a. 217.06 kN b. 266.63 kN c. 271.14 kN d. 296.63 kN 10. Determine the spacing of 12 mm dia. ties. N. (3 points) 400 mm a. 240 mm b. 250 mm 600 mm c. 260 mm d. 270 mm