What is progressive collapse?

The concrete in the core of a spiral column is subjected to a uniform confining stress σ3 of 750 psi. What will the compressive strength σ1 be? The unconfined uniaxial compressive strength is 4,300 psi.

Given that dead load = 55 psf, live load = 100 psf, roof live load = 40 psf, snow load = 40 psf, and wind load = 25 psf, determine the largest factored load.

At high loading rates, the strength of concrete decreases.

The fatigue threshold (also known as the endurance limit) is the stress level in a material below which fatigue failures will normally not occur.

Serviceability limit states involve disruption of the functional use of the structure, whereas strength limit states involve structural collapse.

Grade 40, 60, and 75 reinforcement have minimum yield strengths of 40 ksi, 60 ksi, and 75 ksi, respectively.

The term “concrete strength” refers to the uniaxial _______ strength.

Load combinations are presented in companion action format.

The long term strength of concrete that is hot cured will be _______ concrete that is cold cured.