Bridge Seismic Damage Assessment Model Applying Artificial Neural Networks and the Random Forest Algorithm

Table 7

The data of the 40 bridges and the comparison of the true value and prediction results by the ANN model for the Tangshan earthquake in 1976 (the arch bridges are specially marked and the girder bridges are not marked. “Intensity” means the practical intensity).

	Structural type	Bridge pier	Foundation	Bearing	Intensity	ANN	True value
1	Simply supported	Bent	Deep	Other	X	Seriously	Moderately
2	Simply supported	Masonary solid	Deep	Other	X	Seriously	Moderately
3	Simply supported	Masonary solid	Deep	Other	X	Seriously	Moderately
4	Simply supported	Thin-wall	Deep	Other	X	Seriously	Seriously
5	Continuous	Bent	Deep	Other	IX	Seriously	Moderately
6	Simply supported	Masonary solid	Deep	Other	IX	Moderately	Moderately
7	Simply supported	Bent	Deep	Other	IX	Moderately	Moderately
8	Continuous	Bent	Deep	Other	IX	Moderately	Moderately
9	Continuous	Bent	Deep	Other	VIII	Moderately	Moderately
10	Continuous	Bent	Deep	Other	VIII	Seriously	Seriously
11	Continuous	Bent	Deep	Other	VIII	Moderately	Moderately
12	Continuous	Bent	Deep	Other	VIII	Moderately	Moderately
13	Continuous	Bent	Deep	Other	VIII	Moderately	Moderately
14	Simply supported	Bent	Deep	Other	VIII	Moderately	Moderately
15	Simply supported	Bent	Deep	Other	VIII	Moderately	Moderately
16	Continuous	Bent	Deep	Other	VIII	Moderately	Moderately
17	Continuous	Bent	Deep	Other	VIII	Moderately	Moderately
18	Continuous	Bent	Deep	Other	VIII	Seriously	Seriously
19	Continuous	Masonary solid	Deep	Other	VIII	Moderately	Moderately
20	Simply supported	Masonary solid	Deep	Other	VIII	Moderately	Moderately
21	Simply supported	Masonary solid	Deep	Other	VIII	Moderately	Moderately
22	Continuous	Bent	Deep	Other	VIII	Slightly	Slightly
23	Simply supported	Bent	Deep	Other	VII	Slightly	Moderately
24	Simply supported	Bent	Deep	Other	VII	Slightly	No
25	Simply supported	Bent	Deep	Other	VII	Slightly	No
26	Simply supported	Bent	Deep	Other	VII	Moderately	Moderately
27	Simply supported	Bent	Deep	Other	VII	Moderately	Moderately
28	Simply supported	Bent	Deep	Other	VII	Slightly	Slightly
29	Continuous	Bent	Deep	Other	VII	Slightly	Slightly
30	Simply supported	Bent	Deep	Other	VII	Slightly	Slightly
31	Continuous	Bent	Deep	Other	VII	Slightly	Slightly
32	Simply supported	Bent	Deep	Other	VII	Slightly	Moderately
33	Continuous	Bent	Deep	Other	VII	Slightly	Slightly
34	Simply supported	Bent	Deep	Other	VII	No	No
35	Continuous	Bent	Deep	Other	VII	Slightly	No
36	Deck type (arch)	No	Deep	No	VIII	Slightly	Slightly
37	Deck type (arch)	No	Deep	No	VIII	Slightly	Moderately
38	Deck type (arch)	Bent	Deep	No	VIII	Slightly	Slightly
39	Deck type (arch)	No	Deep	No	VIII	Slightly	Moderately
40	Deck type (arch)	No	Deep	No	VIII	Slightly	Slightly