Research Article
Health Assessment of Large Two Dimensional Structures Using Limited Information: Recent Advances
Table 1
Stiffness parameter (EI/L) identification for defect-free frame using GILS-EKF-UI.
(a) Stage 1: Identification of substructure |
| Member | Identified (EI/L) values in (kN-m) | Nominal/Theoretical | Identified | Error (%) |
| | | | |
| k1 | 13476 | 13479 | 0.024 | k4 | 14553 | 14556 | 0.021 | k11 | 14553 | 14567 | 0.093 | k15 | 13476 | 13489 | 0.094 | k18 | 14553 | 14567 | 0.093 |
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(b) Stage 2: Identification of whole frame |
| Member | Nominal/Theoretical | Identified (EI/L) values in (kN-m) for the whole frame | 15 DDOFs | 18 DDOFs | 21 DDOFs | 24 DDOFs | Identified | Identified | Identified | Identified | Error (%) |
| | | | | | | |
| | 13476 | 11549 | 14249 | 13473 | 13545 |
0.51
| | 13476 | 6384 | 15241 | 13244 | 13681 |
1.52
| | 13476 | 24229 | 8321 | 13779 | 13497 |
0.16
| | 13476 | 2930 | 10149 | 11680 | 13109 |
−2.73
| | 13476 | 50270 | 15249 | 11170 | 13519 |
0.32
| | 13476 | 40685 | 17062 | 16639 | 13458 |
−0.14
| | 13476 | 12047 | 10015 | 11737 | 13153 |
−2.40
| | 13476 | 6082 | 10387 | 10303 | 13705 |
1.70
| | 13476 | 14577 | 17322 | 18879 | 13808 |
2.46
| | 14553 | 27805 | 16037 | 14514 | 14601 |
0.33
| | 14553 | 10595 | 15485 | 14410 | 14542 |
−0.08
| | 14553 | 11857 | 12273 | 14693 | 14547 |
−0.04
| | 14553 | 13325 | 24412 | 14333 | 14432 |
−0.83
| | 14553 | 11798 | 10859 | 12672 | 14192 |
−2.48
| | 14553 | 9602 | 10497 | 11716 | 14552 |
−0.01
| | 14553 | 14115 | 18201 | 14494 | 14903 |
2.41
| | 14553 | 22920 | 21218 | 21784 | 14547 |
−0.04
| | 14553 | 17465 | 10272 | 12572 | 14375 |
−1.22
| | 14553 | 10073 | 11568 | 11671 | 14312 |
−1.66
| | 14553 | 9499 | 19770 | 13730 | 14351 |
−1.39
| | 14553 | 28112 | 17496 | 20806 | 15177 | 4.29 |
| | |
| w | | 1000 | 1000 | 1000 | 1000 |
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