A concrete cylinder 12 inches high is subjected to a compression test. At 5600 psi, the...
A concrete cylinder 12 inches high is subjected to a compression test. At 5600 psi, the strain is 0.0013 in/in. Determine (a) the change in length of the cylinder at 5600 psi and (b) the modulus of elasticity of the concrete cylinder.
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A concrete cylinder 12 inches high is subjected to a compression
test. At 5600 psi, the...
A 6*12-in. concrete cylinder was tested under compression, and the ultimate load was calculated as 141,371.7...
A 6*12-in. concrete cylinder was tested under compression, and the ultimate load was calculated as 141,371.7 lb. Calculate the ultimate compressive strength of the cylinder in psi. A similar specimen with the same strength was initially loaded to 50 psi and strain was measured as 0.00050. After that, the specimen was loaded to 40% of its ultimate strength and the measured strain was 0.00078. Calculate the modulus of elasticity of concrete. c. Under the same loading conditions stated in part...
Q. No.5: A concrete cylinder having a dimeter of 4 in. was tested in compression at...
Q. No.5: A concrete cylinder having a dimeter of 4 in. was tested in compression at concrete age of 28 days to find the compressive strength of concrete. The cylinder failed at a peak load of 91,280 lb. For this concrete determine: o Compressive strength of concrete e) o Modulus of elasticity (Ee o Modulus of rupture
A 6 x 12-in. concrete cylinder was tested to failure. The following loads and strains were...
A 6 x 12-in. concrete cylinder was tested to failure. The following loads and strains were recorded: Load, kips Strain 10-4 Load, kips Strain×10-4 0.0 12 24 36 48 60 0.0 1.2 2.0 3.2 5.2 7.2 72 84 96 108 95 82 10.0 13.6 18.0 30.0 39.0 42.0 a. Draw the stress-strain diagram of concrete and determine the maximum stress and corresponding strain b. Determine the initial modulus and secant modulus. c. Calculate the modulus of elasticity of concrete using...
Stress-strain curve represents the result of 6" x 12" concrete cylinders tested in compression. From the...
Stress-strain curve represents the result of 6" x 12" concrete cylinders tested in compression. From the results determine, • The approximate load causing the specified strength of the concrete • The tensile strength of the concrete per ACI 318-14 • The modulus of elasticity of concrete, based on: a. The appropriate ACI 318-14 expression b. the ACI 318-14's Secant approach 6 5 4 Stress, ksi 3 1 O 0.001 0.003 0.004 0.002 Strain
1. Reinforced Rectangular Concrete Beam The reinforced concrete beam shown is subjected to a bending moment...
1. Reinforced Rectangular Concrete Beam The reinforced concrete beam shown is subjected to a bending moment of 200 kip ft. Knowing that the modulus of elasticity for the concrete and the steel are respectively Ec= 3.75 X 10 psi and Es = 30 x 10 psi, determine the tensile stress in [ksh] that develops in the steel bars. 20 in 1 in diameter 72.5 in 12 in-
. Describe the response of concrete subjected to cyclic loading with the help of a graph. (Note: ...
. Describe the response of concrete subjected to cyclic loading with the help of a graph. (Note: Please plot a graph and then describe the effect of cyclic loading on strength and modulus of elasticity of concrete. You will not get credit if you cut and paste the graph from class notes). 2. Discuss why testing of concrete for direct tensile strength is difficult to achieve. What indirect test methods have been developed to assess the tensile strength of concrete?...
A concrete test cylinder made from a known design mix is loaded with P-200 kips and compresses by...
A concrete test cylinder made from a known design mix is loaded with P-200 kips and compresses by o.018 inch. a) Determine the strain developed in concrete b) Determine the axial compressive stress c) A contractor wants to use the same concrete design mix in a new construction project where the required compressive strength of concrete is 4000 psi. Would you approve the concrete mix? P= 200 kips S-0.018 st TEST
A concrete test cylinder made from a known design...
Class Activity Consider an unreinforced concrete beam cross section with the dimensions (in inches) shown in...
Class Activity Consider an unreinforced concrete beam cross section with the dimensions (in inches) shown in the figure. The comcrete is sormal-weight with 6000 psi145Ib/f The section is subjected to a positive beading moment of 500 kip-ft about its horizontal axis causing compression and tension on the faces as shown. Assume the section remains elastic under this moment 15 Tension 20 Determine centroid of the section from the compression face. Answer: c-7.622 in (A) Determine moment of inertia of the...
A rectangular concrete beam measures 12 inches wide and has a depth of 26 inches. The...
A rectangular concrete beam measures 12 inches wide and has a depth of 26 inches. The centroid of the tension rebars is located 4 inches from the tension surface of the beam. Use fy = 60 ksi f’c = 3 ksi, compressive failure strain of concrete = 0.003. (A) Find the required tension rebars As to carry Mu = 5,700 kips-in. Show that the steel ratio does not meet the ACI requirements. (B) What can you do to meet ACI...
A 7.7 cm section of spine is subjected to a compression force of 560 N. Find...
A 7.7 cm section of spine is subjected to a compression force of 560 N. Find the magnitude of its change in length, taking the Young's modulus to be 2.4×108 N/m² and approximating the spine as a cylinder 3.9 cm in diameter.
Q. No.5: A concrete cylinder having a dimeter of 4 in. was tested in compression at concrete age of 28 days to find the compressive strength of concrete. The cylinder failed at a peak load of 91,280 lb. For this concrete determine: o Compressive strength of concrete e) o Modulus of elasticity (Ee o Modulus of rupture
A 6 x 12-in. concrete cylinder was tested to failure. The following loads and strains were recorded: Load, kips Strain 10-4 Load, kips Strain×10-4 0.0 12 24 36 48 60 0.0 1.2 2.0 3.2 5.2 7.2 72 84 96 108 95 82 10.0 13.6 18.0 30.0 39.0 42.0 a. Draw the stress-strain diagram of concrete and determine the maximum stress and corresponding strain b. Determine the initial modulus and secant modulus. c. Calculate the modulus of elasticity of concrete using...
Stress-strain curve represents the result of 6" x 12" concrete cylinders tested in compression. From the results determine, • The approximate load causing the specified strength of the concrete • The tensile strength of the concrete per ACI 318-14 • The modulus of elasticity of concrete, based on: a. The appropriate ACI 318-14 expression b. the ACI 318-14's Secant approach 6 5 4 Stress, ksi 3 1 O 0.001 0.003 0.004 0.002 Strain
1. Reinforced Rectangular Concrete Beam The reinforced concrete beam shown is subjected to a bending moment of 200 kip ft. Knowing that the modulus of elasticity for the concrete and the steel are respectively Ec= 3.75 X 10 psi and Es = 30 x 10 psi, determine the tensile stress in [ksh] that develops in the steel bars. 20 in 1 in diameter 72.5 in 12 in-
. Describe the response of concrete subjected to cyclic loading with the help of a graph. (Note: Please plot a graph and then describe the effect of cyclic loading on strength and modulus of elasticity of concrete. You will not get credit if you cut and paste the graph from class notes). 2. Discuss why testing of concrete for direct tensile strength is difficult to achieve. What indirect test methods have been developed to assess the tensile strength of concrete?...
A concrete test cylinder made from a known design mix is loaded with P-200 kips and compresses by o.018 inch. a) Determine the strain developed in concrete b) Determine the axial compressive stress c) A contractor wants to use the same concrete design mix in a new construction project where the required compressive strength of concrete is 4000 psi. Would you approve the concrete mix? P= 200 kips S-0.018 st TEST
A concrete test cylinder made from a known design...
Class Activity Consider an unreinforced concrete beam cross section with the dimensions (in inches) shown in the figure. The comcrete is sormal-weight with 6000 psi145Ib/f The section is subjected to a positive beading moment of 500 kip-ft about its horizontal axis causing compression and tension on the faces as shown. Assume the section remains elastic under this moment 15 Tension 20 Determine centroid of the section from the compression face. Answer: c-7.622 in (A) Determine moment of inertia of the...
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