A new reliability analysis approach for the flexural capacity of postfire reinforced concrete beams retrofitted with CFRPs. Issue 8 (13th August 2019)

• Record Type: Journal Article
• Authors: Cai, Bin; Zhang, Bo; Fu, Feng
• Is Part Of: Proceedings of ICE. Volume 172:Issue 8(2019:Aug.)
• Page Start: 1
• Page End: 40
• Publication Date: 2019-08-13
• Subjects: Concrete structures -- Composite structures -- Fire engineering -- CFRP -- Reliability -- Monte Carlo method; Civil engineering -- Periodicals; Structural engineering -- Periodicals; 624
• DOI: 10.1680/jstbu.19.00037
• Languages: English
• ISSNs: 0965-0911

Abstract

Abstract : This study proposed a new reliability analysis approach for the flexural capacity of postfire reinforced concrete (RC) beams retrofitted with carbon fiber reinforced polymers/plastics (CFRPs). In this approach, the thermal parameters of RC beams were determined first to enable heat transfer analysis in ABAQUS. Based on the thermal response obtained from the heat transfer analysis, a section method is used to calculate the postfire residual flexural capacity of RC beams. The reliability analysis of the beams retrofitted with CFRPs is subsequently performed using the Monte Carlo method. The effects of fire exposure time, concrete cover thickness, and CFRP usage on the reliability of the flexural capacity of RC beams after fire exposure were studied. This new approach was found to be accurate and effective. It provides an effective reliable model for the evaluation of the mechanical properties of post-fire RC beams strengthened with CFRPs.