Experimental Investigation of Progressive Collapse of Prestressed Concrete Frames after the Loss of Middle Column

Table 2

Mechanical properties of reinforcement and prestressing strands.

Items	Nominal diameters (mm)	Yield strength (MPa)	Ultimate strength (MPa)	Elastic modulus (MPa)	Elongation (%)
R8	8	371.0	550.2	2.1 × 10^5	10.8
D8	8	449.2	670.8	1.9 × 10^5	8.5
D12	12	429.1	583.9	2.0 × 10^5	12.2
D16	16	539.0	711.4	2.0 × 10^5	14.3
Prestressing strand	9.5	1812	1926	1.9 × 10^5	5.5