Study on Elastic Global Shear Buckling of Curved Girders with Corrugated Steel Webs: Theoretical Analysis and FE Modelling
| Autor: | Jitao Zhong, Kangjian Wang, Lin An, Hanshan Ding, Man Zhou, Mostafa Fahmi Hassanein |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Constitutive equation Shell (structure) 020101 civil engineering curved girder 02 engineering and technology Curvature Orthotropic material lcsh:Technology 0201 civil engineering lcsh:Chemistry 0203 mechanical engineering Girder global shear buckling General Materials Science lcsh:QH301-705.5 Instrumentation variational principle Fluid Flow and Transfer Processes corrugated steel web lcsh:T business.industry Process Chemistry and Technology General Engineering curvature radius Structural engineering lcsh:QC1-999 Finite element method Computer Science Applications Shear (sheet metal) 020303 mechanical engineering & transports lcsh:Biology (General) lcsh:QD1-999 Buckling lcsh:TA1-2040 Galerkin’s method lcsh:Engineering (General). Civil engineering (General) business lcsh:Physics |
| Zdroj: | Applied Sciences, Vol 8, Iss 12, p 2457 (2018) Applied Sciences Volume 8 Issue 12 |
| ISSN: | 2076-3417 |
| Popis: | Despite the construction of several curved prestressed concrete girder bridges with corrugated steel webs (CSWs) around the world their shear behavior has seldom been investigated. Accordingly, this paper substitutes the lack of available information on the global elastic shear buckling of a plane curved corrugated steel web (PCCSW) in a curved girder. This is based on the equilibrium equations and geometric equations in the elastic theory of classical shells, combined with the constitutive relation of orthotropic shells. Currently, the global elastic shear buckling process of the PCCSW in a curved girder is studied, for the first time in literature, with an equivalent orthotropic open circular cylindrical shell (OOCCS) model. The governing differential equation of global elastic shear buckling of the PCCSW, as well as its buckling strength, is derived by considering the orthotropic characteristics of a corrugated steel web, the rational trigonometric displacement modes, Galerkin&rsquo s method and variational principles. Additionally, the accuracy of the proposed theoretical formula is verified by comparison with finite element (FE) results. Moreover, the expressions of the inner or outer folded angle and radius of curvature are given by the cosine theorem of the trigonometric function and inverse trigonometric function. Subsequently, parametric analysis of the shear buckling behavior of the PCCSW is carried out by considering the cases where the radius of curvature is constant or variable. This parametric analysis highlights the effects of web dimensions, height-to-thickness ratio, aspect ratios of longitudinal and inclined panels, corrugation height, curvature radius and folded angles on the elastic shear buckling strength. As a result, this study provides a theoretical reference for the design and application of composite curved girders with CSWs. |
| Databáze: | OpenAIRE |
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