Post-Blast Axial Capacity of CFRP Strengthened RC Columns

Kadhom, Bessam; Almansour, Husham; Saatçioğlu, Murat

doi:10.1088/1757-899x/737/1/012042

Cited by 3 publications

(4 citation statements)

References 1 publication

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“…Li et al [25] 2017 Building column Field UHPC + HSRC 1:1 Fouché et al [26] 2017 Bridge column Field CFDST 1:4 Dua et al [27] 2018 Column Field RC 1:1 Dua et al [28] 2019 Column Field RC 1:1 Wang et al [29] 2020 Bridge column Field UHPCC-FST 1:4 Kadhom et al [30] 2020 Column Shock tube RC and RC + CFRP 1:2 Vapper and Lasn [31] 2020…”

Section: Author Year Structural Element Experiments Type Materials Scalementioning

confidence: 99%

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Blast Loaded Columns—State of the Art Review

Lukić¹,

Draganić²

2021

Applied Sciences

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The ever-present threat of terrorist attacks in recent decades gives way to research towards blast-resistant design of structures. Columns, as one of the main load-bearing elements in residential buildings and bridges, are becoming interesting targets in bombing attacks. Research of column blast load behavior leads toward increased safety by identifying shortcomings and problems of those elements and acting accordingly. Field tests and numerical simulations lead to the development of new blast load mitigation technics, either in the design process or as a retrofit and strengthening of existing elements. The article provides a state-of-the-art literature review of filed blast load tests and numerical simulations of a bridge and building columns.

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Section: Author Year Structural Element Experiments Type Materials Scalementioning

confidence: 99%

“…When the width dimension of the column subjected to the blast load is greater two and more times from depth, the damage index is lower. Kadhom et al [30] examined five half-scale RC columns. Three columns are strengthened with unidirectional and woven CFRP laminates while the other two remained unprotected.…”

Section: Building Columnsmentioning

confidence: 99%

Blast Loaded Columns—State of the Art Review

Lukić¹,

Draganić²

2021

Applied Sciences

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“…Transverse wrapping of reinforced columns with FRP sheets was found to enhance blast resistance through enhancements in post-peak strength and ductility due to confinement, elimination of concrete cover spalling, preventing instability failure of compression reinforcement, and mechanically anchoring longitudinal FRP sheets (Jacques et al, 2015; Lloyd 2015). Kadhom et al (2020) investigated the influence of fiber orientation on the blast behavior of retrofitted concrete columns and found that ±45° woven fibers exhibited superior performance and the most ductile response. Vapper and Lasn (2020) demonstrated that the effectiveness of longitudinal FRP retrofitting of columns is substantially reduced if transverse wraps are not provided to activate confinement and mechanical anchorage.…”

Section: Introductionmentioning

confidence: 99%

Blast retrofit of one-way reinforced concrete members using externally bonded FRP and FRP anchorage

Jacques

Saatçioğlu

2022

International Journal of Protective Structures

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This paper presents the results of nine as-built and carbon fiber reinforced polymer (CFRP) retrofitted reinforced concrete panels subjected to simulated blast loading using a pneumatically operated shock tube. The objective of the study was to characterize the blast response of CFRP retrofitted reinforced concrete panels, with and without supplemental mechanical anchorage applied to the CFRP. The results indicate that retrofitting can significantly increase the strength and stiffness of reinforced concrete flexure members and greatly enhance the displacement time-history response over non-retrofitted members. Debonding of the externally bonded CFRP was the failure mode for all retrofitted members. FRP anchors, designed to prevent or delay debonding failures through mechanical end-anchorage, were found to substantially enhance the performance of panels experiencing critical diagonal crack debonding. However, the FRP anchors were found to have no substantial effect on retrofit performance for the case plate-end interfacial debonding failures. In addition, the displacement time-histories for as-built and FRP retrofitted panel obtained through detail single degree of freedom analysis were found correlate well with those obtained experimentally. Finally, a discussion on the practical considerations of using externally bonded FRP retrofits to resist blast loads and recommendations for protective design are presented.

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“…Furthermore, it is important to establish a scientific method that can be used to evaluate the safety status after blast loading and to find an effective and economical way to increase the antiexplosion performances of buried petroleum pipelines. Carbon-fibre-reinforced polymer (CFRP) has a low weight, high strength, and good plasticity, and CFRP is often used to repair structural members such as beams, columns, panels, and walls [4][5][6][7][8][9][10][11]. Additionally, CFRP can improve the impact resistance of a reinforced object and reduce the damage in an oil-gas field [12,13].…”

Section: Introductionmentioning

confidence: 99%

Research on Damage Assessment of Buried Standard and Carbon‐Fibre‐Reinforced Polymer Petroleum Pipeline Subjected to Shallow Buried Blast Loading in Soil

Cui

Fang

et al. 2021

Shock and Vibration

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Buried petroleum pipelines may encounter threats from blast loading due to terrorist attacks, accidental explosions, and artificial blasting during in-progress construction. Carbon-fibre-reinforced polymer (CFRP) is often used for the repair and reinforcement of buried petroleum pipelines. It is meaningful and necessary to distinguish the different responses and establish an effective damage assessment method for standard petroleum pipelines and CFRP-supported petroleum pipelines buried in soil under blast loading. In this study, under fixed end constraints, experimental analysis and numerical simulations were combined to assess the damage of a standard petroleum pipeline and a CFRP petroleum pipeline buried in soil under blast loading. The results showed that, for a scaled distance of 0.19 m/kg1/3, plastic deformation occurred on the surfaces of the two pipelines facing the explosive. The antiexplosion performance of the CFRP pipeline was better than that of the standard pipeline, and the CFRP sheets had a positive effect on the protection of the buried petroleum pipeline during the buried blast loading. Furthermore, based on pressure-impulse damage theory and with consideration of the feasibility under real circumstances, two pressure-impulse damage evaluation curves for standard and CFRP pipelines facing explosive loads were established separately based on a new critical ratio of the dent depth and length. Finally, based on the two pressure-impulse damage evaluation curves and the new critical ratio, two pressure-impulse damage criteria for these two buried petroleum pipelines were defined. Moreover, with the two pressure-impulse damage evaluation curves, mathematical formulae for the two different buried petroleum pipelines were established to generate pressure-impulse diagrams. With the established formulae, the damage to the standard buried pipeline and the CFRP pipeline could be evaluated effectively. Damage to other similar standard pipelines or CFRP pipelines buried in soil with different design parameters due to shallow buried blast loading could also be evaluated using this method.

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Post-Blast Axial Capacity of CFRP Strengthened RC Columns

Cited by 3 publications

References 1 publication

Blast Loaded Columns—State of the Art Review

Blast Loaded Columns—State of the Art Review

Blast retrofit of one-way reinforced concrete members using externally bonded FRP and FRP anchorage

Research on Damage Assessment of Buried Standard and Carbon‐Fibre‐Reinforced Polymer Petroleum Pipeline Subjected to Shallow Buried Blast Loading in Soil

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