Question

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 the ACI formula for normal-weight concrete and compare results. 4730Vf MPa

Answer 1

Ans Civen thet ood, ki 0.O 12. 2L 36 Load,kips 0.O 12 3나 96 108 95 82. 10-о 13.6 13.0 3.2 30.C 5-2 6o 39.0 42-0 100 a. 9.95 (336) 10 6D 50 2-25 (32.3) o. 30 40 50 (x10,-) . known as shoot kenm ngent moduluS ig ala6

오. fck iS not ven we take, M2s 500o 25 c: 25000 Nln? c) E100 Cade