Compressive Behavior of FRP Grid-Reinforced UHPC Tubular Columns

Zeng, Jun-Jie; Long, Tianwei

doi:10.3390/polym14010125

Cited by 12 publications

(4 citation statements)

References 68 publications

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“…Advanced material solutions were developed for this goal, including fiber-reinforced polymers (FRPs) and composite materials for the blast protection of structural elements [69][70][71], retrofitting materials for enhanced blast performance [72] and high energy-absorbing materials [73]. Other advanced materials can be considered, including ultra-high-performance concrete under impact loading [74][75][76], hybrid-reinforced concrete [77] and reinforced concrete beams strengthened with carbon fiber-reinforced polymer [78]. The impact performance of precast segmental columns [79][80][81] and beams [82] was under extensive research, also at the experimental level [83][84][85].…”

Section: Introductionmentioning

confidence: 99%

Meta-Material Layout for the Blast Protection of Above-Ground Steel Pipes

Kontogeorgos

Fuggini

2023

Geotechnics

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The current study investigates the capacity of the proposed meta-material layout for the blast protection of above-ground steel pipes against explosions. The philosophy of the meta-material layout’s design is described adequately, and the 1D periodic structures’ theory is adopted for the analytical prediction of the layout’s band-gaps. The special characteristics of the blast loading are explained, and specific time-related parameters are calculated. The layout is tested numerically for nine explosion scenarios of various magnitude via the finite element program ABAQUS, and the CONWEP model is selected for the simulation of the explosions. The results demonstrate a significant reduction in the maximum displacements developed on the pipe’s spring line and crown within a blast loading. This study composes an extension of the author’s previous research on buried steel pipes and surface explosion, advancing now the applicability of the meta-material layouts for the cases of above-ground steel pipes towards explosions and blast hazards. The outer goal is the investigation and the further spreading of the beneficial exploitation of meta-materials concepts for the scope of the pipelines’ effective blast protection, readdressing that this way is a major hazard for this type of structure and a gap in the current literature.

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Section: Introductionmentioning

confidence: 99%

Meta-Material Layout for the Blast Protection of Above-Ground Steel Pipes

Kontogeorgos

Fuggini

2023

Geotechnics

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“…al. [62] [63], one was internally reinforced with an FRP grid, and the other was internally reinforced with novel FRP micro-bars. Based on the above literature review, it can be seen that, from the perspective of complementary advantages, the combination of FRP, ECC, and UHPC to form a new lightweight, high-strength, and high-durability composite structure has broad application prospects.…”

Section: Introductionmentioning

confidence: 99%

I-shaped ECC/UHPC composite beams reinforced with steel bars and BFRP sheets

Dong¹,

Ji²,

Liu³

et al. 2022

Sustain. Struct.

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This paper proposes a new type of small-sized I-shaped engineered cementitious composite (ECC)/ ultra-high performance concrete (UHPC) composite beam which has the potential to be suitable for corrosive environments. The lower tensile part of the beam was made of ECC material (2/3 of the height), and the top compressive part was made of UHPC material (1/3 of the height). Inner embedded steel bars and surface-bonded basalt fiber reinforced polymer (BFRP) sheets were adopted as the reinforcing materials in combination. A total of nine I-shaped beams were designed and tested under four-point bending test. The influence of parameters such as the ratio of the embedded tensile steel bars, the top UHPC flange, and the surface bonded tensile BFRP sheet on the behavior of the beams was investigated. The results showed that the I-shaped ECC/UHPC composite beams have excellent comprehensive performance, and thanks to the ultra-high durability of the component materials, they have ultra-high durability that ordinary I-steel beams do not have and thus have broad application prospects in corrosive environments. The shear resistance capacity of the thin-walled ECC web needs to be further improved, and UHPC is recommended for the web in the follow-up study.

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“…UHPC has the characteristics of high strength, high toughness, high ductility [ 3 ], crack resistance [ 4 ], impact resistance [ 5 ], and durability [ 6 ]. Components built with this material have lightweight, strong spanning ability [ 7 , 8 ] and have become a new type of building material with application prospects [ 9 ]. However, UHPC has a very low water–cement ratio.…”

Section: Introductionmentioning

confidence: 99%

Interfacial Shear Performance of Epoxy Adhesive Joints of Prefabricated Elements Made of Ultra-High-Performance Concrete

Zhang

Zou

et al. 2022

Polymers

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Application of ultra-high-performance concrete (UHPC) in joints can improve the impact resistance, crack resistance, and durability of structures. In this paper, the direct shear performance of ultra-high-performance concrete (UHPC) adhesive joints was experimentally studied. Twenty-four direct shear loading tests of UHPC adhesive joints were carried out considering different interface types and constraint states. The failure modes and load-slip curves of different interfaces were studied. Results indicated that passive confinement could enhance the strength and ductility of the interface; the average ultimate bearing capacity of the smooth, rough, grooved, and keyway specimens with passive restraint were, respectively, increased by 11.92%, 8.91%, 11.93%, and 17.766% compared with the unrestrained ones. The passive constraint force changes with the loading and finally tends to be stable. The epoxy adhesive has high reliability as a coating for the UHPC interface. The adhesive layer is not cracked before the failure of the specimen, which is also different from the common failure mode of adhesive joints. Failure of all specimens occurred in the UHPC layer, and the convex part of the groove interface shows the UHPC matrix peeling failure; the keyway interface is the shear damage of the key-tooth root, and the rest of the keyway showed UHPC surface peeling failure. According to the failure mode, the shear capacity of UHPC keyway adhesive joints under passive restraint is mainly provided by the shear resistance of key teeth, the friction force of the joint surface, and the bonding force of the UHPC surface. The friction coefficient was determined based on the test results, and the high-precision fitting formula between the shear strength of the UHPC surface and the passive constraint force was established. According to the Mohr stress circle theory, the proposed formula for direct shear strength of UHPC bonded joints under passive constraint was established. The average ratio of the proposed UHPC adhesive joint calculation formula to the test results was 0.99, and the standard deviation was 0.027.

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Compressive Behavior of FRP Grid-Reinforced UHPC Tubular Columns

Cited by 12 publications

References 68 publications

Meta-Material Layout for the Blast Protection of Above-Ground Steel Pipes

Meta-Material Layout for the Blast Protection of Above-Ground Steel Pipes

I-shaped ECC/UHPC composite beams reinforced with steel bars and BFRP sheets

Interfacial Shear Performance of Epoxy Adhesive Joints of Prefabricated Elements Made of Ultra-High-Performance Concrete

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