Effect of Temperature Variation on Modal Frequency of Reinforced Concrete Slab and Beam in Cold Regions

Table 5

between modal frequencies and temperatures.

Structure	Temperature	Mode
		1	2	3	4
Slab	Air temperature	0.778	0.715	0.804	0.702
	Surface temperature	0.874	0.856	0.901	0.863
	Mean temperature	0.911	0.903	0.925	0.915
Beam	Air temperature	0.784	0.679	0.820	0.667
	Surface temperature	0.886	0.801	0.855	0.752
	Mean temperature	0.913	0.853	0.909	0.834