Flexural behaviour of corroded RC beams exposed to fire
| Autor: | Faraz Tariq, Pradeep Bhargava |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Materials science
0211 other engineering and technologies 020101 civil engineering 02 engineering and technology Building and Construction Reinforced concrete 0201 civil engineering Corrosion Cathodic protection Flexural strength 021105 building & construction Architecture Composite material Safety Risk Reliability and Quality Beam (structure) Civil and Structural Engineering |
| Zdroj: | Structures. 33:1366-1375 |
| ISSN: | 2352-0124 |
| Popis: | Reinforced concrete structures located in coastal areas face durability-related concerns such as reinforcing steel's corrosion due to aggressive and humid environments. An accidental fire in such a scenario can lead to a severe loss of mechanical properties and load-carrying capacity. This paper examines the load–deflection response of short-span RC beams on account of exposure to combinations of corrosion-induced damage and exposure to elevated temperatures. The idea pertinent to this study is to simulate a fire in an old or aged structure located in a humid environment. The study involved flexure testing on normal strength reinforced concrete beams reinforced with SD TMT (Super Ductile thermo-mechanically treated) bars. The RC beam specimens were exposed to impressed current to achieve desired corrosion levels in terms of mass loss of 4% & 8% and subsequently to elevated temperatures (400 °C and 600 °C) under a steady state. The beams were tested in flexure, and the load–deflection response was observed. The results indicate a notable reduction in load–deflection behavior due to the two non-linear phenomena' superimposition. It was concluded that the exposure to combinations mentioned above of corrosion-induced damage and elevated temperatures caused significant loss of load–deflection response of RC beams. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect