Assessment of Shear Connection through Composite Beam Modeling
| Autor: | Jeffrey S. West, Scott Walbridge, Matthew Sjaarda |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
business.industry Mechanical Engineering 0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Structural engineering Welding Finite element method Composite beams 0201 civil engineering Connection (mathematics) law.invention Shear (sheet metal) Composite construction Cable gland law Precast concrete 021105 building & construction business Civil and Structural Engineering |
| Zdroj: | Transportation Research Record: Journal of the Transportation Research Board. 2672:177-185 |
| ISSN: | 2169-4052 0361-1981 |
| Popis: | Steel-concrete composite construction is used extensively in bridges across North America. The welded shear stud is the standard connector used today, but other connectors, such as the through-bolt connector, may have advantages for precast construction or applications where better fatigue resistance or deconstructability is desired. The standard method of assessing the performance of a shear connector is through the use of push tests. However, the load-slip curves that result from these tests do not accurately predict load-slip behavior at the shear interface of the beams and girders they are meant to simulate. In this paper, a model is presented that predicts composite beam behavior using elastic material properties and nonlinear shear connector load-slip curves. The finite element (FE) model features link connector elements between a steel beam and concrete slab that can be programmed to simulate different connector types. Although the model can be used with push test load-slip curves as inputs, it is shown that a much better prediction can be made using force-deformation data from experimental beam tests or FE analysis. Results are discussed for stud connectors and through-bolt connectors, and it is shown that while through-bolts allow more interfacial slip and overall deflection, material stresses and composite interaction are not affected as much as might be expected. The outcome of this work is a comparison tool which can be used to assess the viability of current and future shear connection alternatives with the goal of achieving an economical and structurally sound shear connector. |
| Databáze: | OpenAIRE |
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