Material characteristics at elevated temperatures

Concrete

The compressive strength of concrete is calculated in accordance with 4.2.4.2:

Where is:	*f_c,Θ*	The compressive strength of concrete at temperature Θ
	*k_c*	The coefficient
	*f_ck*	The characteristic compressive cylinder strength of concrete at 28 days

The ratio f_c,Θ/f_ck for high stress concrete (HSC) corresponds to the table 6.1N.

The characteristic strength of reinforcement steel is calculated according to the chapter 4.2.4.3:

Where is:	*f_sy,Θ*	The strength of reinforcement steel at temperature Θ
	*k_s*	The coefficient
	*f_yk*	The characteristic yield strength of reinforcement