Modeling of Temperature Effect on Modal Frequency of Concrete Beam Based on Field Monitoring Data

Figure 11

Histograms of the modal frequencies before and after the elimination of temperature effects. (a1) 1st modal frequency before eliminating temperature effect; (a2) 2nd modal frequency before eliminating temperature effect; (a3) 3rd mode modal frequency before eliminating temperature effect; (a4) 4th modal frequency before eliminating temperature effect; (b1) 1st modal frequency after eliminating temperature effect; (b2) 2nd modal frequency after eliminating temperature effect; (b3) 3rd modal frequency after eliminating temperature effect; (b4) 4th modal frequency after eliminating temperature effect.