Onsite Identification of Moving Vehicle Loads on Multispan Continuous Bridge Using Both Dictionary Expansion and Sparse RegularizationSource: Journal of Aerospace Engineering:;2021:;Volume ( 034 ):;issue: 003::page 04021018-1DOI: 10.1061/(ASCE)AS.1943-5525.0001258Publisher: ASCE
Abstract: Moving force identification (MFI) plays an important role in monitoring moving vehicle loads acting on a bridge, which has attracted great attention in recent years. Although many MFI methods have been proposed, their effectiveness in real bridges has not been carefully investigated. In this study, focusing on how to identify moving forces from structural responses in a real bridge, some important aspects are conducted and discussed in detail. The effectiveness of a MFI method based on dictionary expansion and sparse regularization is evaluated by a five-span continuous bridge in real engineering. First, a finite-element (FE) model is established to approximately describe the real bridge. Then, the FE model is updated based on the modal information obtained from structural responses, so the transfer matrices between moving forces and structural responses can be calculated. Meanwhile, data preprocessing is conducted and a suitable dictionary is designed to obtain reasonable MFI results. As a result, the MFI equation by adding reweighted l1-norm regularization is used for MFI. Finally, two trucks with known gross vehicle weights are adopted to evaluate its effectiveness. The MFI results show that this method can reasonably estimate the moving vehicle loads acting on bridge deck, and the identified moving forces are reasonable.
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contributor author | Huanlin Liu | |
contributor author | Cheng Li | |
contributor author | Ling Yu | |
contributor author | Yafei Wang | |
contributor author | Jiwei Zhong | |
date accessioned | 2022-02-01T00:24:14Z | |
date available | 2022-02-01T00:24:14Z | |
date issued | 5/1/2021 | |
identifier other | %28ASCE%29AS.1943-5525.0001258.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4271381 | |
description abstract | Moving force identification (MFI) plays an important role in monitoring moving vehicle loads acting on a bridge, which has attracted great attention in recent years. Although many MFI methods have been proposed, their effectiveness in real bridges has not been carefully investigated. In this study, focusing on how to identify moving forces from structural responses in a real bridge, some important aspects are conducted and discussed in detail. The effectiveness of a MFI method based on dictionary expansion and sparse regularization is evaluated by a five-span continuous bridge in real engineering. First, a finite-element (FE) model is established to approximately describe the real bridge. Then, the FE model is updated based on the modal information obtained from structural responses, so the transfer matrices between moving forces and structural responses can be calculated. Meanwhile, data preprocessing is conducted and a suitable dictionary is designed to obtain reasonable MFI results. As a result, the MFI equation by adding reweighted l1-norm regularization is used for MFI. Finally, two trucks with known gross vehicle weights are adopted to evaluate its effectiveness. The MFI results show that this method can reasonably estimate the moving vehicle loads acting on bridge deck, and the identified moving forces are reasonable. | |
publisher | ASCE | |
title | Onsite Identification of Moving Vehicle Loads on Multispan Continuous Bridge Using Both Dictionary Expansion and Sparse Regularization | |
type | Journal Paper | |
journal volume | 34 | |
journal issue | 3 | |
journal title | Journal of Aerospace Engineering | |
identifier doi | 10.1061/(ASCE)AS.1943-5525.0001258 | |
journal fristpage | 04021018-1 | |
journal lastpage | 04021018-11 | |
page | 11 | |
tree | Journal of Aerospace Engineering:;2021:;Volume ( 034 ):;issue: 003 | |
contenttype | Fulltext |