| Title |
An Experimental Study on the Mechanical Properties by Compressive Strength Areas at High Temperature |
| Authors |
Kim Heung-Youl ; Seo Chee-Ho ; Shin Hyun-Joon |
| Keywords |
High Strength Concrete ; Compressive Strength at High Temperature ; Modulus of Elasticity at High Temperature |
| Abstract |
The fire situation has been serious and fire losses are increasing with the construction of high rise buildings using high strength concrete. Thus, this research is to present experimental data on evaluation and prediction of fire safety of structural members using high strength concrete by proposing material models and strain constitutive models based on material properties, which has come to conclusions as follows: First of all, between 100 to 200℃, the high strength concrete show degradation at 100℃ and restoration at 200℃. The high strength concrete show elastic deformation at 20 ∼200℃. Second, between 300 to 400℃, the mechanical properties of the high strength concrete which are exposed to fire show 75∼95％ as compared to the original properties because the thermally expanded ingredients of concrete, aggregates and cement paste, etc. The high strength concrete show both elastic and plastic deformation at these temperatures. Finally, beyond 600℃, the high strength concrete shows 75 ∼80％ reduction in thermal properties as compared to the normal concrete in the range of 600 to 800℃ and it shows 10∼30％ as compared to the original properties. |