Wrapping and anchoring effects on CFRP strengthened reinforced concrete arches subjected to blast loads

This paper studies the effectiveness of bonding carbon fiber reinforced polymer (CFRP) with additional wraps or anchors to strengthen reinforced concrete (RC) arches resisting blast loads, which is of great significance to optimize the CFRP strengthening methods. To improve the anti‐explosion behavior, RC arches are bonded with CFRP sheets in longitudinal and transverse directions, and anti‐explosion behaviors were investigated through experiments. The performance of strengthened arches is discussed in terms of damage degrees in contrast to the un‐strengthened arch. Under explosive loading, the resistance of composite arches to spalling, shearing, and bending is much better than that of control arch. The results show that the anti‐explosion effect of wrapping or anchoring, which can prevent CFRP debonding or peeling‐off, is much better than only bonding CFRP in the longitudinal direction. Besides, simplified analysis models are proposed to assess the blast‐resistant capacity of CFRP strengthened RC arches, which show good agreement with the experiment.

[1]  Jing Zhong,et al.  Effects of Combined Usage of Supplementary Cementitious Materials on the Thermal Properties and Microstructure of High-Performance Concrete at High Temperatures , 2020, Materials.

[2]  M. Khedmati,et al.  Assessment of performance criteria of reinforced concrete beams retrofitted with FRP fabrics subjected to extreme impulsive loading , 2020 .

[3]  A. Pattanaik,et al.  Effect of environmental aging conditions on the properties of fly ash filled epoxy composites , 2020, Advanced Composite Materials.

[4]  Jiuk Shin,et al.  Retrofit scheme of FRP jacketing system for blast damage mitigation of non-ductile RC building frames , 2019, Composite Structures.

[5]  J. Gonzalez-Libreros,et al.  Experimental behaviour of damaged masonry arches strengthened with steel fiber reinforced mortar (SFRM) , 2019, Composites Part B: Engineering.

[6]  Jun-hai Zhao,et al.  Research on Dynamic Response of Concrete-Filled Steel Tube Columns Confined with FRP under Blast Loading , 2019, Shock and Vibration.

[7]  M. Dehestani,et al.  Experimental study on fracture behavior of notched self‐consolidating concrete beam strengthened with off‐axis CFRP sheet , 2019, Structural Concrete.

[8]  Hailong Chen,et al.  Blast responses and damage evaluation of CFRP tubular arches , 2019, Construction and Building Materials.

[9]  Hailong Chen,et al.  Failure mechanisms of CFRP-wrapped protective concrete arches under static and blast loadings: Experimental research , 2018, Composite Structures.

[10]  Hailong Chen,et al.  Load carrying capacity of CFRP retrofitted broken concrete arch , 2017 .

[11]  Mario De Stefano,et al.  Intrados strengthening of brick masonry arches with different FRCM composites: Experimental and analytical investigations , 2016 .

[12]  G. Milani,et al.  Fast and reliable non-linear heterogeneous FE approach for the analysis of FRP-reinforced masonry arches , 2016 .

[13]  Martina Drdlová,et al.  Blast resistance characteristics of concrete with different types of fibre reinforcement , 2015 .

[14]  Hailong Chen,et al.  CFRP strengthening reinforced concrete arches: Strengthening methods and experimental studies , 2015 .

[15]  Yu Zhang,et al.  Derivation of a General Reflection Coefficient of Blast-Loaded Buried Structures , 2015 .

[16]  Oded Rabinovitch,et al.  Strengthening of Reinforced Concrete Arches with Externally Bonded Composite Materials: Testing and Analysis , 2015 .

[17]  Hailong Chen,et al.  Experimental behaviors of CFRP cloth strengthened buried arch structure subjected to subsurface localized explosion , 2014 .

[18]  Donald O. Dusenberry,et al.  Handbook for Blast-Resistant Design of Buildings , 2010 .

[19]  Jian fei Chen,et al.  Blast resistance of FRP composites and polymer strengthened concrete and masonry structures - A state-of-the-art review , 2007 .

[20]  Abhiroop Goswami,et al.  Are FRPs the Way Forward for the Blast Retrofitting of Reinforced Concrete Structures? , 2019, Lecture Notes in Civil Engineering.

[21]  Moncef L. Nehdi,et al.  Critical overview of blast resistance of different concrete types , 2014 .