Publicación
Artículo científico (article).
Analytical observability method for the structural system identification of wide-flange box girder bridges with the effect of shear lag
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- Sun, Yuan
- Xu, Yaren
- Lozano Galant, José Antonio
- Wang, Xiaoming
- Turmo Coderque, José|||0000-0001-5001-2438
In the field of bridge structural system identification (SSI), Bernoulli beam element models are often used to solve inverse problems. More rarely, Timoshenko beam element models can be calibrated. However, these models account for only the general shear effects, whereas other shear effects, such as shear lag, are not accounted for. However, as wide-flange box girder bridges become prevalent due to design demands, neglecting shear lag may introduce significant errors in predicting the mechanical parameters of the system and, hence, reduce the accuracy. In this paper, for the first time, the shear lag's effect on the vertical deflections is taken into account in an inverse problem. A parametric SSI, the observability method (OM), is updated to address the identification of thin-walled box girder bridges with wide flanges, including the shear lag effects. The structural analytical equations are used to connect the spatial shear effects with the beam-unidimensional-element model to be applied in the inverse analysis, which is referred to as the analytical observability method (AOM-SSI). This updated version of the OM is established and validated to identify the mechanical parameters of a structural test. The identified mechanical parameters show much better agreement with the expected results than those obtained with previous methods., This work was supported by BIA2017-86811-C2-1-R Spanish Ministry of Economy and Competitiveness, Spain. It was also supported by the Innovation Group Project, Natural Science Foundation of Hubei, China (Grant No. 2020CFA047) and the National Natural Science Foundation of China (Grant No.52178104)., Peer Reviewed
DOI: http://hdl.handle.net/2117/356213, https://dx.doi.org/10.1016/j.autcon.2021.103879
UPCommons. Portal del coneixement obert de la UPC
oai:upcommons.upc.edu:2117/356213
HANDLE: http://hdl.handle.net/2117/356213, https://dx.doi.org/10.1016/j.autcon.2021.103879
UPCommons. Portal del coneixement obert de la UPC
oai:upcommons.upc.edu:2117/356213
Ver en: http://hdl.handle.net/2117/356213, https://dx.doi.org/10.1016/j.autcon.2021.103879
UPCommons. Portal del coneixement obert de la UPC
oai:upcommons.upc.edu:2117/356213
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