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A platform for research: civil engineering, architecture and urbanism
Chord axial compressive behavior of hybrid FRP-concrete-steel double-skin tubular member T-joints
https://orcid.org/0000-0003-0893-6623
Highlights Compressive behavior of DSTCs with a brace is comprehensively explored. DSTM T-joints exhibite a ductile behavior provided that the joint region is appropriately strengthened. The compressive behavior of the chord with a brace-to-chord diameter ratio of 0.5 is hardly affected by the brace. The existing model can well predict the axial load-strain curves, nonetheless further validation is needed.
Abstract Hybrid fiber reinforced polymer (FRP)-concrete-steel double-skin tubular members (DSTMs) are a promising form of structural members with superior mechanical performance and durability, which have great potential for application in ocean structures. Such hybrid DSTMs consist of three components: an inner steel tube, an outer FRP tube, and concrete filled between the two tubes. Despite a significant number of studies demonstrating the excellent performance of hybrid DSTMs, no studies have been concerned with the joints of these members. The lack of a reliable design method for DSTM joints is certainly a huge obstacle to their wide application in practice. Against the above background, a research project has been proposed to understand the static behavior of circular DSTM T-joints through a combined experimental, modeling, and theoretical study. This paper presents the results of an experimental program on the axial compressive behavior of the chord in DSTM T-joints. The effects of various important factors, such as FRP tube thickness, steel tube thickness, brace-to-chord diameter ratio, void ratio, and concrete strength, on the performance of the DSTM T-joints were examined in detail. The test results demonstrated that the DSTM T-joints exhibited a ductile behavior provided that the joint region was appropriately strengthened and the presence of a brace did not significantly affect the compressive behavior of the chord in the joints with a brace-to-chord diameter ratio of 0.5. Finally, a simple method was proposed to predict the axial load-axial strain behavior of the DSTM T-joints.
Chord axial compressive behavior of hybrid FRP-concrete-steel double-skin tubular member T-joints
https://orcid.org/0000-0003-0893-6623
Highlights Compressive behavior of DSTCs with a brace is comprehensively explored. DSTM T-joints exhibite a ductile behavior provided that the joint region is appropriately strengthened. The compressive behavior of the chord with a brace-to-chord diameter ratio of 0.5 is hardly affected by the brace. The existing model can well predict the axial load-strain curves, nonetheless further validation is needed.
Abstract Hybrid fiber reinforced polymer (FRP)-concrete-steel double-skin tubular members (DSTMs) are a promising form of structural members with superior mechanical performance and durability, which have great potential for application in ocean structures. Such hybrid DSTMs consist of three components: an inner steel tube, an outer FRP tube, and concrete filled between the two tubes. Despite a significant number of studies demonstrating the excellent performance of hybrid DSTMs, no studies have been concerned with the joints of these members. The lack of a reliable design method for DSTM joints is certainly a huge obstacle to their wide application in practice. Against the above background, a research project has been proposed to understand the static behavior of circular DSTM T-joints through a combined experimental, modeling, and theoretical study. This paper presents the results of an experimental program on the axial compressive behavior of the chord in DSTM T-joints. The effects of various important factors, such as FRP tube thickness, steel tube thickness, brace-to-chord diameter ratio, void ratio, and concrete strength, on the performance of the DSTM T-joints were examined in detail. The test results demonstrated that the DSTM T-joints exhibited a ductile behavior provided that the joint region was appropriately strengthened and the presence of a brace did not significantly affect the compressive behavior of the chord in the joints with a brace-to-chord diameter ratio of 0.5. Finally, a simple method was proposed to predict the axial load-axial strain behavior of the DSTM T-joints.
Chord axial compressive behavior of hybrid FRP-concrete-steel double-skin tubular member T-joints
https://orcid.org/0000-0003-0893-6623
Highlights Compressive behavior of DSTCs with a brace is comprehensively explored. DSTM T-joints exhibite a ductile behavior provided that the joint region is appropriately strengthened. The compressive behavior of the chord with a brace-to-chord diameter ratio of 0.5 is hardly affected by the brace. The existing model can well predict the axial load-strain curves, nonetheless further validation is needed.
Abstract Hybrid fiber reinforced polymer (FRP)-concrete-steel double-skin tubular members (DSTMs) are a promising form of structural members with superior mechanical performance and durability, which have great potential for application in ocean structures. Such hybrid DSTMs consist of three components: an inner steel tube, an outer FRP tube, and concrete filled between the two tubes. Despite a significant number of studies demonstrating the excellent performance of hybrid DSTMs, no studies have been concerned with the joints of these members. The lack of a reliable design method for DSTM joints is certainly a huge obstacle to their wide application in practice. Against the above background, a research project has been proposed to understand the static behavior of circular DSTM T-joints through a combined experimental, modeling, and theoretical study. This paper presents the results of an experimental program on the axial compressive behavior of the chord in DSTM T-joints. The effects of various important factors, such as FRP tube thickness, steel tube thickness, brace-to-chord diameter ratio, void ratio, and concrete strength, on the performance of the DSTM T-joints were examined in detail. The test results demonstrated that the DSTM T-joints exhibited a ductile behavior provided that the joint region was appropriately strengthened and the presence of a brace did not significantly affect the compressive behavior of the chord in the joints with a brace-to-chord diameter ratio of 0.5. Finally, a simple method was proposed to predict the axial load-axial strain behavior of the DSTM T-joints.
Chord axial compressive behavior of hybrid FRP-concrete-steel double-skin tubular member T-joints
Lin, Guan (author) / Zeng, Junjie (author) / Li, Jiaxing (author) / Chen, G.M. (author)
Thin-Walled Structures ; 196
2023-12-22
Article (Journal)
Electronic Resource
English
Chord axial compressive behavior of hybrid FRP-concrete-steel double-skin tubular member T-joints
| Elsevier | 2024
| Elsevier | 2024
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