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A platform for research: civil engineering, architecture and urbanism
Compressive behaviour of concrete-filled multi-cell GFRP pultruded square columns reinforced with lattice-webs
Highlights Novel concrete-filled multi-cell GFRP pultruded columns reinforced with lattice-webs (ML-CFPTs) were proposed. Axial compressive behaviour including confinement effectiveness and interface bonding properties was studied. Multi-cell structures improved the confinement effectiveness of square pultruded tubes, and the application of lattice-webs greatly improved the ductility and load-bearing capacity of composite columns. An analytical expression and a design-oriented model were adopted to predict the hoop rupture strain and stress–strain of the composite columns.
Abstract Experimental studies have generally confirmed the good mechanical performance of the pultruded tubes, while brittle buckling failure and low confining efficiency are still the problems to be addressed. Against this background, a concrete-filled multi-cell glass fibre-reinforced polymer (GFRP) pultruded column reinforced with lattice-webs (ML-CFPT) was proposed, and an experimental study on the compressive behaviour of square ML-CFPTs was presented in this paper. A total of 18 specimens including 6 control specimens and 12 multi-cell columns with/without lattice-webs were tested, with the studied parameters covering the thicknesses of face sheets and lattice-webs. The test results revealed that multi-cell structures improved the brittle failure manner of the pultruded tubes, and applications of lattice-webs delayed the local buckling of pultruded tubes thus exhibiting better confinement effectiveness. Furthermore, a simple design-oriented model on the basis of test results was proposed to predict the bilinear ascending stress–strain curve of the confined concrete in ML-CFPTcs, and the results were consistent with the test data.
Compressive behaviour of concrete-filled multi-cell GFRP pultruded square columns reinforced with lattice-webs
Highlights Novel concrete-filled multi-cell GFRP pultruded columns reinforced with lattice-webs (ML-CFPTs) were proposed. Axial compressive behaviour including confinement effectiveness and interface bonding properties was studied. Multi-cell structures improved the confinement effectiveness of square pultruded tubes, and the application of lattice-webs greatly improved the ductility and load-bearing capacity of composite columns. An analytical expression and a design-oriented model were adopted to predict the hoop rupture strain and stress–strain of the composite columns.
Abstract Experimental studies have generally confirmed the good mechanical performance of the pultruded tubes, while brittle buckling failure and low confining efficiency are still the problems to be addressed. Against this background, a concrete-filled multi-cell glass fibre-reinforced polymer (GFRP) pultruded column reinforced with lattice-webs (ML-CFPT) was proposed, and an experimental study on the compressive behaviour of square ML-CFPTs was presented in this paper. A total of 18 specimens including 6 control specimens and 12 multi-cell columns with/without lattice-webs were tested, with the studied parameters covering the thicknesses of face sheets and lattice-webs. The test results revealed that multi-cell structures improved the brittle failure manner of the pultruded tubes, and applications of lattice-webs delayed the local buckling of pultruded tubes thus exhibiting better confinement effectiveness. Furthermore, a simple design-oriented model on the basis of test results was proposed to predict the bilinear ascending stress–strain curve of the confined concrete in ML-CFPTcs, and the results were consistent with the test data.
Compressive behaviour of concrete-filled multi-cell GFRP pultruded square columns reinforced with lattice-webs
Yang, Laiyun (author) / Fang, Hai (author) / Xie, Honglei (author) / Li, Benben (author)
Engineering Structures ; 279
2022-12-31
Article (Journal)
Electronic Resource
English
Axial compressive behaviour of GFRP tube reinforced concrete columns
| Elsevier | 2015
Axial compressive behaviour of GFRP tube reinforced concrete columns
| Online Contents | 2015