TY - JOUR
T1 - Bending performance of splice connections for assembly of tubular section FRP members
T2 - experimental and numerical study
AU - Qiu, Chengyu
AU - Bai, Yu
AU - Zhang, Lei
AU - Jin, Li
PY - 2019/10
Y1 - 2019/10
N2 - This paper presents experimental and numerical investigations of the bending performance of innovative splice connections developed for tubular section FRP members. Each of the splice connections consists of a steel bolted flange joint between two tubular steel-FRP bonded sleeve joints. Three connection specimens with different bolt configurations or bond lengths are prepared and tested under four-point bending. Finite element (FE) models are developed featuring a mixed-mode bilinear traction-separation relation for the adhesive bond, the Tsai-Wu failure criterion for the FRP, and yielding of the steel components. The contact behavior and bolt pretensioning are also modeled in detail. All of the connection specimens exhibit excellent ductility through yielding of the steel flange-plate before ultimate failure. The FE modeling, validated by the experimental failure mode, moment-rotation behavior, and strain response, provides insight into the adhesive stress distribution and the yielding mechanism of the steel flange-plates. According to Eurocode 3 for steel structures, the connection specimens are all classified as semirigid and partial-strength connections. The results also show that under flexural loading, the splice connections, which have ductility indices between 5.7 and 8.4, are able to impart ductility to a structure made of brittle FRP members.
AB - This paper presents experimental and numerical investigations of the bending performance of innovative splice connections developed for tubular section FRP members. Each of the splice connections consists of a steel bolted flange joint between two tubular steel-FRP bonded sleeve joints. Three connection specimens with different bolt configurations or bond lengths are prepared and tested under four-point bending. Finite element (FE) models are developed featuring a mixed-mode bilinear traction-separation relation for the adhesive bond, the Tsai-Wu failure criterion for the FRP, and yielding of the steel components. The contact behavior and bolt pretensioning are also modeled in detail. All of the connection specimens exhibit excellent ductility through yielding of the steel flange-plate before ultimate failure. The FE modeling, validated by the experimental failure mode, moment-rotation behavior, and strain response, provides insight into the adhesive stress distribution and the yielding mechanism of the steel flange-plates. According to Eurocode 3 for steel structures, the connection specimens are all classified as semirigid and partial-strength connections. The results also show that under flexural loading, the splice connections, which have ductility indices between 5.7 and 8.4, are able to impart ductility to a structure made of brittle FRP members.
KW - Bolted flange joint
KW - Bonded sleeve joint
KW - Ductility
KW - Fiber reinforced polymer (FRP)
KW - Splice connection
KW - Tubular section member
UR - http://www.scopus.com/inward/record.url?scp=85070290919&partnerID=8YFLogxK
U2 - 10.1061/(ASCE)CC.1943-5614.0000964
DO - 10.1061/(ASCE)CC.1943-5614.0000964
M3 - Article
AN - SCOPUS:85070290919
SN - 1090-0268
VL - 23
JO - Journal of Composites for Construction
JF - Journal of Composites for Construction
IS - 5
M1 - 04019040
ER -