CIVL 4135HOMEWORK SET 9

CIVL 4135 Shear191

1. Select the spacing of U--shaped stirrups made of No. 3 bars for the beam shown below. UseEq. 11--5 of ACI 318 to obtain Vc.

fc = 3, 000 psify = 40, 000 psi

4--#8

8 -- #10

3

28

13

4

25-- 6

Wu = 9.0 (k/ft)

CIVL 4135HOMEWORK SET 9

CIVL 4135 Shear192

2. Determine the spacing of vertical U--shaped stirrups made of No. 3 deformed bars at point6.0 ft from the face of the support for the cantilever beam shown below. Use Equation 11--5of ACI 318 to determine Vc. The loads shown are service loads (load factors have not beenapplied). The concentrated load is a dead load. Compare the calculationswith themaximumspacing.

fc = 4, 000 psify = 40 ksi

26.0

12

10--0

4.0

3.0

8 in2

3 in2

A

A

Section A--A

DL = 1.0 k/ftLL = 1.0 k/ft

20 kips