ABSTRACT
Recently damage identification method based on vehicle-bridge coupled vibrations attracted many researchers’ attention. The previous studies focus on the crack damage type, but the other kind of damages happened to actual bridge are rarely mentioned. The research on the effect of hinged joint damages on the vehicle-induced dynamic response of bridges will lay a foundation for the further damage identification research. In the present study, PC simply supported multi-slab girder bridges are studied. Typical hinged joint damages frequently occurring on this bridge type is considered in this study. Firstly an appropriate numerical simulation method and numerical model for this damage is proposed and verified according to the requirement of dynamic response analysis of bridge under vehicle. Secondly, a suitable multislab girder bridge finite element modelling strategy based on multi-scale is developed. A 3D vehicle-bridge dynamic interaction model is used to predict the dynamic response of bridge under vehicles. Secondly, effect of hinged joint damage on the dynamic behaviour of bridge under vehicles is numerically studied. Various vehicle acting modes and different damage combination cases are considered during the analysis. The distribution characteristics of the most unfavourable and high sensitivity dynamic response of the bridge are presented based on the analysis results. Finally, some suggestions on choosing damage index for damage identification are proposed. The finite element model of the bridge. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315207681/cd556cd4-4dcf-4efe-8e29-56fc67b8bfbd/content/fig250_1.tif"/> Acceleration amplitude ratio of each point in multi hinge joint damage. https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9781315207681/cd556cd4-4dcf-4efe-8e29-56fc67b8bfbd/content/fig250_2.tif"/> Condition setting of damage hinge joints.
Condition No.
Damage Depth (m)
Damage length (m)
Damage position
CASE 1
0.12
8
1#
CASE 2
0.12
8
1#2#
CASE 3
0.12
8
1#2#3#
CASE 4
0.12
8
1#2#3#4#
CASE 5
0.28
8
1#
CASE 6
0.28
8
1#2#
CASE 7
0.28
8
1#2#3#
CASE 8
0.28
8
1#2#3#4#
CASE 9
0.43
8
1#
CASE 10
0.43
8
1#2#
CASE 11
0.43
8
1#2#3#
CASE 12
0.43
8
1#2#3#4#
CASE 13
0.28
14
1#2#3#
CASE 14
0.28
20
1#2#3#
