RCD

Question 1

For a SIMPLY SUPPORTED ‘Two-Equal Beam Spans’, what gives the value of Rmax, Vmax, Mmax (–)

Answer 1

Rmax = 1.25w_uL
Vmax = 0.625 w_uL
Mmax (–) = (w_uL²)/8

Question 2

For a SIMPLY SUPPORTED ‘Two-Equal Beam Spans’, what gives the value of R_ext

Answer 2

R_ext = (3/8)w_udlL + (7/16)w_ullL

Question 3

For a FIXED ‘Two-Equal Beam Spans’, what gives the value of:

a.) Maximum Positive Moment
b.) Moment at the exterior support
c.) Moment at the interior support

Answer 3

a.) w_uLn²/9
b.) - w_uLn²/16
c.) - w_uLn²/14

Question 4

What gives the value of the modulus of elasticity ( E ) of concrete?

Answer 4

For values of w_c between 1440 and 2560 kg/m3:
Ec = 0.043w_c^1.5sqrt(f’c)

Ec = 4700 sqrt(f’c)

Question 5

In Allowable Stress Design, what gives the value of rupture stress, f_r

Answer 5

f_r = 0.62 λ sqrt( f’c)

Question 6

What gives the value of clear spacing between longitudinal rebars?

Answer 6

Greatest of:
25mm
d_b
(4/3)d_agg.

Question 7

What gives the clear spacing between longitudinal bars in columns

Answer 7

a.) 40mm
b.) 1.5db
c.) 4/3 dagg