Analysis of the shear lag effect of cantilever box girder
Keywords:
cantilever box girder, shear lag effect, minimum potential energy, variation method, shearlag coefficientAbstract
The theoretical method for solving the shear lag effect of cantilever box girder is applicable through exerting the principle of minimum potential energy and combining the variation method, from which the computation expressions of longitudinal displacement function and maximum angle displacement difference function are deduced. The computational formulas of the shear lag coefficient, additional bending moment and deflection are also deduced under condition that the cantilever box girder is acting both on the concentrated force load and uniformly distributed load. The simulated analysis model is built using a finite element method. The analysis indicates that if the external load produces a constant shear flow within the section of the cantilever beam, only the positive shear lag effect will be produced ;but if such load produces a varying or reverse shear flow within the section of the cantilever beam, the negative shear lag effect will be produced. As the magnitude of the shear lag coefficient is proportional to the wide-span ratio, the structural deflection will be increased either by a positive or negative shear lag effect. . The theoretical analysis is consistent with the analysis conclusion of the finite element method.Downloads
Published
Issue
Section
License
Engineering review uses the Creative Commons Attribution-NonCommercial-NoDerivatives (CC-BY-NC-ND) 4.0 International License, which governs the use, publishing and distribution of articles by authors, publishers and the wider general public.
The authors are allowed to post a digital file of the published article, or the link to the published article (Enginering Review web page) may be made publicly available on websites or repositories, such as the Author’s personal website, preprint servers, university networks or primary employer’s institutional websites, third party institutional or subject-based repositories, and conference websites that feature presentations by the Author(s) based on the published article, under the condition that the article is posted in its unaltered Engineering Review form, exclusively for non-commercial purposes.
The journal Engineering Review’s publishing procedure is performed in accordance with the publishing ethics statements, defined within the Publishing Ethics Resource Kit. The Ethics statement is available in the document Ethics Policies.