Finite Element Model Updating of Bridge Structures Based on Improved Response Surface Methods

Table 2

Comparison of parameter-updated results based on different model updating methods.

Parameters	True value (×10^4 MPa)	Traditional response surface method		Improved response surface method
		Updated (×10^4 MPa)	Error (%)	Updated (×10^4 MPa)	Error (%)
E5	2.592	2.617	0.984	2.591	0.019
E8	3.55	3.399	4.254	3.550	0
E9	3.195	2.987	6.510	3.218	0.719
E12	3.55	3.537	0.366	3.550	0
E15	2.982	3.370	13.011	2.973	0.302
Converged iterations (steps)		932		97