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A platform for research: civil engineering, architecture and urbanism
Concrete protective arches reinforced with BFRP bars: Construction and quasi-static structural performances
Highlights BFRP and BFRP-steel bars were applied to reinforce concrete arches. Deformation, failure pattern and load of these reinforced arches were revealed. Long elastic deformation of BFRP bars endows concrete arch ductile deformation. A structural model coupled with bending-compression-shear effect was proposed.
Abstract To construct corrosion resistant protective underground arches in waterfront structural engineering, steel bars are replaced by basalt fiber reinforced polymer (BFRP) bars and hybrid BFRP-steel bars. Eight semi-circular arches reinforced with steel bars, BFRP bars and BFRP-steel bars were casted. Quasi-static compression experiments were performed to evaluate the structural performances of the arches, including the deformation types, the failure modes and the ultimate loading capacities. Although the composite bars are linear elasticity, the concrete arches reinforced with composite bars behave as elastic-plastic deformation. The arches have typical flexural failure mode when the failure is determined by the crushing of the compressed concrete. Meanwhile, some of them exhibit brittle failure when the vault of the arch is sheared to fracture. Compared with the steel bars reinforced arches (SBRAs), the BFRP bars reinforced arches (BBRAs) have comparable ductility and ultimate loading capacity. An analytical method of the structure, including the coupling effects of bending moment, axial force, and shear force, was proposed to predict the load capacity of the SBRAs and BBRAs. The results show that the new proposed analytical method can capture the experimental results with acceptable errors. According to the experiments and analytical results, the BBRAs with excellent corrosion resistance can be treated as a replacement of SBRAs in waterfront underground protective structures.
Concrete protective arches reinforced with BFRP bars: Construction and quasi-static structural performances
Highlights BFRP and BFRP-steel bars were applied to reinforce concrete arches. Deformation, failure pattern and load of these reinforced arches were revealed. Long elastic deformation of BFRP bars endows concrete arch ductile deformation. A structural model coupled with bending-compression-shear effect was proposed.
Abstract To construct corrosion resistant protective underground arches in waterfront structural engineering, steel bars are replaced by basalt fiber reinforced polymer (BFRP) bars and hybrid BFRP-steel bars. Eight semi-circular arches reinforced with steel bars, BFRP bars and BFRP-steel bars were casted. Quasi-static compression experiments were performed to evaluate the structural performances of the arches, including the deformation types, the failure modes and the ultimate loading capacities. Although the composite bars are linear elasticity, the concrete arches reinforced with composite bars behave as elastic-plastic deformation. The arches have typical flexural failure mode when the failure is determined by the crushing of the compressed concrete. Meanwhile, some of them exhibit brittle failure when the vault of the arch is sheared to fracture. Compared with the steel bars reinforced arches (SBRAs), the BFRP bars reinforced arches (BBRAs) have comparable ductility and ultimate loading capacity. An analytical method of the structure, including the coupling effects of bending moment, axial force, and shear force, was proposed to predict the load capacity of the SBRAs and BBRAs. The results show that the new proposed analytical method can capture the experimental results with acceptable errors. According to the experiments and analytical results, the BBRAs with excellent corrosion resistance can be treated as a replacement of SBRAs in waterfront underground protective structures.
Concrete protective arches reinforced with BFRP bars: Construction and quasi-static structural performances
Tang, Zexun (author) / Zhou, Yinzhi (author) / Feng, Jiang (author) / Liu, Yang (author) / He, Huguang (author) / Fan, Hualin (author)
2020-11-15
Article (Journal)
Electronic Resource
English
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