Inelastic Analysis of Bare Steel Deck Diaphragms Using the Instantaneous Center Method.
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| Název: | Inelastic Analysis of Bare Steel Deck Diaphragms Using the Instantaneous Center Method. |
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| Autoři: | Koh, Hyeyoung, Sputo, Thomas, Blum, Hannah B. |
| Zdroj: | Journal of Structural Design & Construction Practice; May2025, Vol. 30 Issue 2, p1-6, 6p |
| Témata: | BOLTED joints, SPOT welding, ELECTRIC welding, YIELD strength (Engineering), ELASTIC analysis (Engineering) |
| Abstrakt: | Steel deck diaphragms are currently analyzed using elastic analysis, where the assumed strength limit is reached when the first fastener reaches its elastic strength limit. The objective of this study is to determine whether an alternative inelastic analysis method of bare steel deck diaphragms using the instantaneous center method (ICM) offers a feasible design approach, expanding its application from the use in bolted and welded connections. To implement the ICM, this study considered diaphragms that incorporate various types of fasteners such as arc spot welds and screws. Inelastic load–deformation relationships of these fasteners, required by the ICM, were obtained from the literature. Diaphragm strengths estimated using the ICM were then compared with diaphragm experimental results from published sources. In addition, this study developed computational notebooks for implementing the ICM for diaphragms. These computational notebooks, accompanied by annotated Python code and user-friendly execution instructions, are accessible via an open source repository. Users can readily utilize these notebooks online without the need for local software downloads, making this analysis method easily accessible to future practitioners. Although further refinement of the proposed approach is necessary, this paper presents the framework that can be further developed. Practical Applications: This paper presents how an instantaneous center method can be used to estimate the shear strength of steel deck diaphragms with different types of fasteners, including arc spot welds and screws. This method considers nonlinear behavior of these fasteners. A framework for implementing this approach was developed, incorporating fastener force–deformation relationships from the literature. The model was validated for bolted connections. Although further refinements are necessary to improve the model's accuracy against existing experimental results, the proposed approach shows promise for broader application to diaphragms with diverse fastener configurations. Moreover, this mechanics-based framework enables simplified diaphragm capacity estimation without requiring extensive computational work. To facilitate practical implementation, computational notebooks for estimating the shear strength of steel diaphragms were developed and made publicly available by the authors. Details on how to estimate the diaphragm shear strength using the notebooks are provided for practitioners. [ABSTRACT FROM AUTHOR] |
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| Databáze: | Complementary Index |
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