Chord axial compressive behavior of hybrid FRP-concrete-steel double-skin tubular member T-joints

Lin，Guan1; Zeng，Junjie2,3; Li，Jiaxing3; Chen，G. M.4

2024-03-01

10.1016/j.tws.2023.111535

Thin-Walled Structures   影响因子和分区

0263-8231

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.

Axial compression Brace Chord Double skin tubular members (DSTM) Finite element modelling T-joints

SCI ; EI

英语

第一

ENGINEERING

2-s2.0-85181810145

Scopus

1.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
2.STEM,University of South Australia,Australia
3.School of Civil and Transportation Engineering,Guangdong University of Technology,Guangzhou,510006,China
4.State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou,510641,China

Lin，Guan,Zeng，Junjie,Li，Jiaxing,et al. Chord axial compressive behavior of hybrid FRP-concrete-steel double-skin tubular member T-joints[J]. Thin-Walled Structures,2024,196.

Lin，Guan,Zeng，Junjie,Li，Jiaxing,&Chen，G. M..(2024).Chord axial compressive behavior of hybrid FRP-concrete-steel double-skin tubular member T-joints.Thin-Walled Structures,196.

Lin，Guan,et al."Chord axial compressive behavior of hybrid FRP-concrete-steel double-skin tubular member T-joints".Thin-Walled Structures 196(2024).