Podcast
Questions and Answers
What is the percentage of f c represented by point C in Fig. 3-12a?
What is the percentage of f c represented by point C in Fig. 3-12a?
- 110 percent
- 105 percent
- 107 percent (correct)
- 112 percent
What type of stress state exists in the webs of beams?
What type of stress state exists in the webs of beams?
- Uniaxial tension
- Biaxial tension–compression (correct)
- Uniaxial compression
- Triaxial compression
Why is the splitting tensile strength less than the flexural tensile strength?
Why is the splitting tensile strength less than the flexural tensile strength?
- Due to the difference in loading conditions
- Due to the difference in specimen geometry
- Due to the difference in material properties
- Due to the difference in biaxial stress state (correct)
What happens to the strength and stiffness of concrete under compression parallel to the cracks in cracked reinforced concrete?
What happens to the strength and stiffness of concrete under compression parallel to the cracks in cracked reinforced concrete?
What is the primary reason why cracking does not represent failure of a reinforced concrete member?
What is the primary reason why cracking does not represent failure of a reinforced concrete member?
What is the primary cause of failure in zones 1 and 2 in Fig. 3-12?
What is the primary cause of failure in zones 1 and 2 in Fig. 3-12?
What is the primary purpose of the relationship shown in Figure 3-8?
What is the primary purpose of the relationship shown in Figure 3-8?
What is the effect of a very slow rate of loading on the axial compressive strength?
What is the effect of a very slow rate of loading on the axial compressive strength?
What is the approximate strain rate experienced during the standard cylinder test?
What is the approximate strain rate experienced during the standard cylinder test?
What is the purpose of capping and testing cores drilled from a structure?
What is the purpose of capping and testing cores drilled from a structure?
What is the approximate percentage of the standard test strength reached at a rate of 30,000 psi/sec?
What is the approximate percentage of the standard test strength reached at a rate of 30,000 psi/sec?
What is the primary advantage of using Figure 3-8 for determining when forms can be removed?
What is the primary advantage of using Figure 3-8 for determining when forms can be removed?
What type of stress distribution occurs across the vertical diameter of a concrete specimen?
What type of stress distribution occurs across the vertical diameter of a concrete specimen?
What is the relationship between the modulus-of-rupture strength and the splitting tensile strength of concrete?
What is the relationship between the modulus-of-rupture strength and the splitting tensile strength of concrete?
What is the approximate relationship between the tensile strength and compressive strength of concrete?
What is the approximate relationship between the tensile strength and compressive strength of concrete?
What is the typical decrease in strength observed when the volume of concrete under high tension is increased?
What is the typical decrease in strength observed when the volume of concrete under high tension is increased?
What is the equation used to compute the splitting tensile strength of concrete from a split-cylinder test?
What is the equation used to compute the splitting tensile strength of concrete from a split-cylinder test?
What is the average ratio of the direct tensile strength to the splitting tensile strength of concrete?
What is the average ratio of the direct tensile strength to the splitting tensile strength of concrete?
