Simply supported beams loaded with only gravity loads develop negative bending moments throughout the span.

To limit the width of potential shrinkage cracks parallel to the one-way design strips, shrinkage and temperature reinforcement is placed perpendicular to the primary flexural reinforcement.

A beam has dimensions of b = 14 in., h = 30 in., d’ = 2.5 in., and d = 27.5 in. It is reinforced with 2 No. 5 bars on the compression side and 5 No. 8 bars on the tension side. The concrete strength is 3,400 psi, and the yield strength of the reinforcement is 60,000 psi. If the depth of the neutral axis is c = 6.026 in., determine the strain in the compression reinforcement, ε’s.

How do shearing stresses on horizontal and vertical planes through an element compare?

A compression-controlled section has a tension-reinforcement area such that when the beam reaches its nominal flexural strength, the net tensile strain in the extreme layer of tensile steel is greater than or equal to 0.005.

VOCABULARY B. At College (Talking about Admired People) (3 pts) Paso 1 (2 pts)The daily routine of Rosalía’s friends on campus is very different. Complete each description phrase with the correct verb provided.  

Bars of longitudinal reinforcement must extend the full beam length.

The traditional theory for shear stress assumes homogeneous, plastic, and uncracked beams.

[q15]: Nomino a Josefina Fernández Dávila para el Premio de mejor maestra del año. La señora Fernández es una maestra ejemplar y [q16] este premio y muchos más. [q17] por su atención. Saludos [q18], Rosalía Pérez Guzmán

If a designer wants to increase the moment capacity of a beam, he/she could reduce the amount of tension reinforcement and add compression reinforcement to keep the section compression-controlled.