SiF 2018– The 10th International Conference on Structures in Fire FireSERT, Ulster University, Belfast, UK, June 6-8, 2018
NUMERICAL MODELING OF THERMAL BEHAVIOUR OF CFRP REINFORCED CONCRETE STRUCTURE EXPOSED TO ELEVATED TEMPERATURE Phi Long NGUYEN1, Xuan Hong VU2, Emmanuel FERRIER3 ABSTRACT In recent decades, Carbon Fiber Reinforced Polymer (CFRP) has been commonly used in civil engineering to reinforce concrete structure such as beams, columns and slabs for its good points in properties as well as simply installation process. There are two basic methods to apply the CFRP to concrete structure: externally bonding reinforcement method (EBR) and near surface mounted method (NSM). When a CFRP reinforced concrete structure is subjected to fire, all elements including substrate, CFRP, adhesive are simultaneously affected by elevated temperature and mechanical load. Recent numerical investigations indicated that the NSM seemed to be better than EBR for delaying the debonding at elevated temperature and thus allowing CFRP to be exploited more efficient regarding to severe thermal effects. This paper presents numerical investigations on thermal behaviour of concrete structure strengthened with pultruded CFRP using NSM and using high temperature adhesive. In this research, a double shear CFRP NSM reinforced concrete specimen has been prepared and tested with thermo-mechanical testing condition. A 3D finite element model has been then developed using ANSYS MECHANICAL APDL software to analyze the heat transfer solution to compare with the experimental results. The numerical results, which show good response in comparison with the obtained experiment, are then developed to apply for predicting the thermo-mechanical performance of CFRP reinforced concrete specimen under elevated temperature and fire-temperature with reliability. Keywords: Polymer Reinforced by Carbon Fibres (CFRP); CFRP reinforced concrete structure; Near Surface Mounted reinforcement (NSM); Externally Bonding Reinforcement (EBR); adhesive; elevated temperature; numerical modelling.
1
PhD Candidate, Université de LYON, Université Claude Bernard LYON 1; Laboratoire des Matériaux Composites pour la Construction LMC2;. e-mail:
[email protected]; Lecturer, Ho Chi Minh City University of Transport, Faculty of Construction Engineering, Campus 1: Number 2, D3 Street, Ward 25, Binh Thanh Disctrict, Ho Chi Minh City, Vietnam. e-mail:
[email protected] 2 Associated Professor, Université de LYON, Université Claude Bernard LYON 1; Laboratoire des Matériaux Composites pour la Construction LMC2, France. e-mail:
[email protected] 3 Professor and Director, Université de LYON, Université Claude Bernard LYON 1; Laboratoire des Matériaux Composites pour la Construction LMC2, France. e-mail:
[email protected]
