Temperature Effect on Mechanical Properties and Damage Identification of Concrete Structure

Table 5

First order natural frequency for intact concrete slab.

Temperature; (°C)	Slabs
	−20	201.66	201.66	196.77
0	192.38	196.77	193.85
20	189.94	192.38	186.53
40	184.28	189.91	182.99
60	178.22	187.01	173.83