Experimental and three-dimensional finite element method studies on pounding responses of bridge structures subjected to spatially varying ground motions
Pounding and unseating damages to bridge superstructures have been commonly observed in many previous major earthquakes. These damages can essentially attribute to the large closing or opening relative displacement between adjacent structures. This article carries out an experimental study on the po...
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| Format: | Journal Article |
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Multi-Science Publishing
2016
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| Online Access: | http://hdl.handle.net/20.500.11937/38608 |
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curtin-20.500.11937-38608 |
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curtin-20.500.11937-386082017-09-13T15:35:34Z Experimental and three-dimensional finite element method studies on pounding responses of bridge structures subjected to spatially varying ground motions Li-Xiang, H. Shrestha, Bipin Hao, Hong Bi, Kaiming Ren, Wei-Xin Pounding and unseating damages to bridge superstructures have been commonly observed in many previous major earthquakes. These damages can essentially attribute to the large closing or opening relative displacement between adjacent structures. This article carries out an experimental study on the pounding responses of adjacent bridge structures considering spatially varying ground motions using a shaking table array system. Two sets of large-scale (1:6) bridge models involving two bridge frames were constructed. The bridge models were subjected to the stochastically simulated ground motions in bi-direction based on the response spectra of Chinese Guideline for Seismic Design of Highway Bridge for three different site conditions, considering three coherency levels. Two types of boundary conditions, that is, the fixed foundation and rocking foundation, were applied to investigate the influence of the foundation type. In addition, a detailed three-dimensional finite element model was constructed to simulate an experimental case. The nonlinear material behavior including strain rate effects of concrete and steel reinforcement is included. The applicability and accuracy of the finite element model in simulating bridge pounding responses subjected to spatially varying ground motions are discussed. The experimental and numerical results demonstrate that non-uniform excitations and foundation rocking can affect the relative displacements and pounding responses significantly. 2016 Journal Article http://hdl.handle.net/20.500.11937/38608 10.1177/1369433216646009 Multi-Science Publishing fulltext |
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Digital Repository |
| institution_category |
Local University |
| institution |
Curtin University Malaysia |
| building |
Curtin Institutional Repository |
| collection |
Online Access |
| description |
Pounding and unseating damages to bridge superstructures have been commonly observed in many previous major earthquakes. These damages can essentially attribute to the large closing or opening relative displacement between adjacent structures. This article carries out an experimental study on the pounding responses of adjacent bridge structures considering spatially varying ground motions using a shaking table array system. Two sets of large-scale (1:6) bridge models involving two bridge frames were constructed. The bridge models were subjected to the stochastically simulated ground motions in bi-direction based on the response spectra of Chinese Guideline for Seismic Design of Highway Bridge for three different site conditions, considering three coherency levels. Two types of boundary conditions, that is, the fixed foundation and rocking foundation, were applied to investigate the influence of the foundation type. In addition, a detailed three-dimensional finite element model was constructed to simulate an experimental case. The nonlinear material behavior including strain rate effects of concrete and steel reinforcement is included. The applicability and accuracy of the finite element model in simulating bridge pounding responses subjected to spatially varying ground motions are discussed. The experimental and numerical results demonstrate that non-uniform excitations and foundation rocking can affect the relative displacements and pounding responses significantly. |
| format |
Journal Article |
| author |
Li-Xiang, H. Shrestha, Bipin Hao, Hong Bi, Kaiming Ren, Wei-Xin |
| spellingShingle |
Li-Xiang, H. Shrestha, Bipin Hao, Hong Bi, Kaiming Ren, Wei-Xin Experimental and three-dimensional finite element method studies on pounding responses of bridge structures subjected to spatially varying ground motions |
| author_facet |
Li-Xiang, H. Shrestha, Bipin Hao, Hong Bi, Kaiming Ren, Wei-Xin |
| author_sort |
Li-Xiang, H. |
| title |
Experimental and three-dimensional finite element method studies on pounding responses of bridge structures subjected to spatially varying ground motions |
| title_short |
Experimental and three-dimensional finite element method studies on pounding responses of bridge structures subjected to spatially varying ground motions |
| title_full |
Experimental and three-dimensional finite element method studies on pounding responses of bridge structures subjected to spatially varying ground motions |
| title_fullStr |
Experimental and three-dimensional finite element method studies on pounding responses of bridge structures subjected to spatially varying ground motions |
| title_full_unstemmed |
Experimental and three-dimensional finite element method studies on pounding responses of bridge structures subjected to spatially varying ground motions |
| title_sort |
experimental and three-dimensional finite element method studies on pounding responses of bridge structures subjected to spatially varying ground motions |
| publisher |
Multi-Science Publishing |
| publishDate |
2016 |
| url |
http://hdl.handle.net/20.500.11937/38608 |
| first_indexed |
2018-09-06T22:47:26Z |
| last_indexed |
2018-09-06T22:47:26Z |
| _version_ |
1610900095240241152 |