RETRACTED: Application of Improved Combined Deterministic-Stochastic Subspace Algorithm in Bridge Modal Parameter Identification

Figure 9

Modal shape of the first five orders (MIDAS). (a) Vertical bending mode of the first order (f₁ = 1.14 Hz). (b) Vertical bending of the second order (f₂ = 2.51 Hz). (c) Vertical bending of the third order (f₃ = 3.77 Hz). (d) Vertical bending of the fourth order (f₄ = 4.63 Hz). (e) Vertical bending of the fifth order (f₅ = 8.83 Hz).

(a)

(b)

(c)

(d)

(e)