At a point subjected to plane stress, the stresses are σx = 30 ksi, σy = –5 ksi, and τxy = –25 ksi. Determine the angle θp corresponding to the orientation of the principal planes at the point.

Adhesion and friction between the concrete and reinforcement are quickly lost when the bar is loaded in tension, because the diameter of the bar _______ due to Poisson’s ratio.

The maximum strain at the extreme concrete compression fiber shall be assumed equal to _______.

Assuming Vs exceeds 4sqrt(f’c)bwd, the maximum spacing for vertical stirrups in the following beam is _____. Let b = 16 in. and d = 35 in. There are four No. 7 longitudinal tension bars and No. 5 stirrups at 12 in. o.c.

A continuous beam’s flexural reinforcement must extend at least _____ from the point where it is no longer needed to resist tension. Assume f’c = 4,000 psi, fyt = 40,000 psi, b1 = 20 in., b2 = 13 in., d = 21 in., h1 = 4 in., h2 = 12 in., h3 = 10 in., and t = 8 in. There are four No. 6 longitudinal tension bars and No. 3 stirrups at 8 in. o.c.

The height of available chairs may control the chosen slab thickness.

Compute φVn for the cross section shown. Assume f’c = 5,000 psi, fyt = 40,000 psi, d = 28 in., w = 22.5 in., t = 4 in., and that there are four No. 7 longitudinal tension bars and No. 3 stirrups at 10 in. o.c.

A 123-mm-long beam supports a load of P = 30 N at midspan. The cross section is rectangular with width b = 27 mm and height h = 60 mm. Determine the magnitude of the horizontal shear stress at the centroid of the cross section.

Mis hermanos van a al fútbol americano.

Is it more important to put transverse reinforcement at the ends of a splice or in the middle?