A Bayesian Structural Modal Updating Method Based on Sparse Grid and Ensemble Kalman Filter

Table 1

Initial mass and stiffness of each storey.

	Storey mass (ton)	Storey stiffness in x direction (kN/mm)	Storey stiffness in y direction (kN/mm)
1st storey	4.75	20.85	5.48
2nd storey	6.64	9.23	3.29
3rd storey	7.95	8.37	4.21