| Title |
An Experimental Study on the Mechanical Behavior of Normal Strength Concrete at High Temperature |
| Keywords |
Compressive Strength at High Temperature ; Modulus of Elasticity at High Temperature ; Creep at High Temperature ; Stress-Deformation Curve at High Temperature |
| Abstract |
The purpose of this study is to analyze the mechanical behavior of normal concrete. Experiments were performed with compressive strength, modulus of elasticity, creep, stress-strain curve, with evaluated temperature ranging from 20℃ to 800℃. The following conclusions are drawn from this study. First of all, when concrete was heated, internal temperature of the concrete was temporarily decreased by near 160～175℃ and 550～600℃. This phenomenon may be explained by the hypothesis that internal water of concrete was steamed away at high temperature. Second, concrete met the allowable compressive stress when the internal temperature of concrete reached around 600℃ so that it may be estimated that load bearing capacity of concrete can be reached at 600℃. Third, the stress-strain curves at evaluated temperature showed elastic deformation at 400℃. However, over 600℃, plastic deformation appeared at the curves. Finally, in the creep test at high temperature, initial slopes of concrete at 465℃ and 610℃ were steeper than at 100～400℃ when 20 and 40 percent of ultimate compressive strength were loaded. |