Concrete edge failure of single headed stud anchors exposed to fire and loaded in shear: Experimental and numerical study
| Autor: | Goran Periškić, Kaipei Tian, Jan Hofmann, Joško Ožbolt |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Load capacity
Materials science business.industry Numerical analysis Constitutive equation 0211 other engineering and technologies General Physics and Astronomy 020101 civil engineering 02 engineering and technology General Chemistry Eurocode Structural engineering Finite element method 0201 civil engineering Shear (geology) 021105 building & construction General Materials Science Safety Risk Reliability and Quality business Shear capacity Parametric statistics |
| Zdroj: | Fire Safety Journal. 100:32-44 |
| ISSN: | 0379-7112 |
| DOI: | 10.1016/j.firesaf.2018.07.001 |
| Popis: | In the present study the results of experimental tests and numerical simulations on single headed stud anchors cast in concrete member and loaded in shear against concrete edge are presented and discussed. The anchors were exposed up to 90 min of fire and loaded in shear under hot and cold conditions up to failure. The temperature distribution, load-displacement curves and failure patterns were recorded. The numerical simulations were conducted using a thermo-mechanical model that was implemented into a three-dimensional finite element (3D FE) code. The constitutive law for concrete was the temperature dependent microplane model. The results of numerical analysis, including the temperature history profile, load-displacement response and the failure load, were verified by the experimental results. Subsequently, a parametric study was carried out. The experimental and numerical results show that the shear capacity of headed stud anchors is strongly affected by the fire exposure. Especially the cooling process leads to severe loss of load capacity. It is shown that the design formula according to Eurocode 2, Part 4 (Annex D) for concrete edge failure at 90 min of fire is rather conservative for the loading in the hot state, however, it overestimates the resistance for the cold state. |
| Databáze: | OpenAIRE |
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