Nonlinear Analysis on Slabs Strengthened by Carbon Fiber Sheet Bonded with Inorganic Adhesive after Fire

Abstract:

To understand all-round mechanical performance of RC slabs strengthened by Carbon Fiber Sheet (CFS) bonding with the inorganic adhesive after fire, Conjugate Method is used to analyze the whole mechanical process from loading to failure. On the base of plane section assumption, Moment- Curvature curves are obtained by iterative computation program. Load-displacement curves of slabs at mid-span after fire are obtained by Conjugate Method, and furthermore, curve of moment-sheet stress relationship is obtained, stress of CFS is analyzed. The test and analysis results show that, for RC slabs strengthened by CFS bonded with an inorganic adhesive, maximum stress of composite sheet decreases with small amplitude compared with that at room temperature, and the strength of the sheet can be utilized to a great extent, even if temperature (about 200°C~300°C) an inorganic adhesive experienced outclasses softening temperatures of ordinary organic epoxy adhesives. Slabs strengthened by CFS bonded with inorganic adhesive perform good fire behavior.

• Periodical: Applied Mechanics and Materials (Volumes 256-259)
• Pages: 831-835
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.256-259.831
• Online since: December 2012
• Authors: Fu Xiong Wan*, Wen Zhong Zheng
• Keywords: Carbon Fiber Sheet, Conjugate Beam Method, Inorganic Adhesive, Nonlinear, RC Slab

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