Which one of the following formulas is correct to express the bond stress Bs? Assume shear force at the section = Q. Lever arm = Jd and sum of the perimeter of bars = S.

Which one of the following formulas is correct to express the bond str

1.	Which one of the following formulas is correct to express the bond stress Bs? Assume shear force at the section = Q. Lever arm = Jd and sum of the perimeter of bars = S.
A.	Bs = Q/(Jd+S)
B.	Bs = Jd/(Q*S)
C.	Bs = Q/(Jd*S)
D.	Bs = S/(Jd*S)
Answer» D. Bs = S/(Jd*S)