The FRP-concrete-steel double-skin tubular members (DSTMs) have attracted worldwide research due to their excellent mechanical performance. However, the limitation of these DSTMs lies in the low strength and crack resistance of normal concrete. To further improve their mechanical performance and durability, a solution by replacing the normal concrete in DSTMs with ultra-high performance concrete (UHPC) is proposed. This research focused on the shear behavior of headed stud shear connectors in DSTMs, a crucial component in their overall performance. Through rigorous testing of sixteen push-out specimens, the effects of parameters including the compressive strength of concrete/UHPC, the steel fiber volume ratio in UHPC, and the diameter and layout of headed studs on the interfacial shear behavior of DSTMs were investigated. The test results not only proved that the application of UHPC in DSTMs resulted in a different failure mode and a higher interfacial shear performance, but also revealed that the investigated parameters obviously effected the interfacial shear load-slip responses of DSTM push-out specimens. Subsequently, the shear capacities of push-out specimens predicted by four of the existing theoretical models were compared with the test results. The comparison results indicated that a more accurate model for predicting the interfacial shear capacities of headed stud shear connectors in FRP-UHPC-steel DSTM is needed in future research.
AASHTO (2012) AASHTO LRFD Bridge Design Specifications. Washington, D.C: American Association of State Highway and Transportation Officials.
2.
ASTM D3039/D3039M-17 (2014) Standard Test Method for Tensile Properties of Polymer Matrix Composite Materials. West Conshohocken. PA: American Society of Testing Materials.
3.
ASTM E8 (2016) Standard Test Methods for Tension Testing of Metallic Materials. West Conshohocken, PA: American Society of Testing Materials.
4.
CaoJHShaoXDDengL, et al. (2017) Static and fatigue behavior of short-headed studs embedded in a thin ultrahigh-performance concrete layer. Journal of Bridge Engineering22(5): 04017005.
5.
CollingsD (2005) Steel Concrete Composite Bridges. London, England: Thomas Telford.
6.
DengZCHuangSXueHQ (2024) Experimental study on shear behavior of short studs in Steel-UHPC light composite structure. Journal of Tianjin University (Science and Technology)57(1): 42–52, (in Chinese).
7.
DingJNZhuJSKangJF, et al. (2021) Experimental study on grouped stud shear connectors in precast steel-UHPC composite bridge. Engineering Structures242: 112479.
8.
DingJNZhuJSShiT (2023) Performance of grouped stud connectors in precast steel-UHPC composite bridges under combined shear and tension loads. Engineering Structures277: 115470.
9.
DoinghausPGoralskiCWillN (2003) Design rules for composite structures with high performance steel and high performance concrete. In: Proceedings of the International Conference United Engineering Foundation on High Performance Materials in Bridges. Reston, VA: ASCE, 139–149.
10.
DuanMJZouXXBaoY, et al. (2022) Experimental investigation of headed studs in steel-ultra-high performance concrete (UHPC) composite sections. Engineering Structures270: 114875.
11.
ECS Eurocode-4 (2004) Design of Composite Steel and Concrete Structures. European Committee for Standardization. Brussels, Belgium: European Committee for Standardization.
12.
GaoXLWangJYYanJB (2020) Experimental studies of headed stud shear connectors in UHPC Steel composite slabs. Structural Engineering and Mechanics74(5): 657–670.
13.
GB-50017 (2003) Code for Design of Steel Structure. Beijing, China: China Planning Press. (in Chinese).
14.
GB/T-2975 (2018) Steel Mechanical Properties and Process Performance Test Sampling Regulations. Beijing, China: Standards Press of China. (in Chinese).
15.
GB/T-50081 (2019) Standard for Test Methods of Concrete Physical and Mechanical Properties. Beijing, China: China Architecture & Building Press. (in Chinese).
16.
HollawayLCTengJG (2008) Strengthening and Rehabilitation of Civil Infrastructures Using Fibre-Reinforced Polymer (FRP) Composites. Cambridge, England: Woodhead Publishing.
17.
HuYQYinHGDingXM, et al. (2020) Shear behavior of large stud shear connectors embedded in ultra-high-performance concrete. Advances in Structural Engineering23(16): 3401–3414.
18.
HungCEl-TawilSChaoS (2021) A review of developments and challenges for UHPC in structural engineering: behavior, analysis, and design. Journal of Structural Engineering147(9): 03121001.
JohnsonRP (1994) Composite Structures of Steel and Concrete, Volume 1: Beams, Slabs, Columns, and Frames for Buildings. Oxford, England: Blackwell Scientific Publication.
21.
KangSTLeeYParkYD, et al. (2010) Tensile fracture properties of an Ultra High Performance Fiber Reinforced Concrete (UHPFRC) with steel fiber. Composite Structures92(1): 61–71.
22.
KimJSParkSHJohC, et al. (2013) Push-out test on shear connectors embedded in UHPC. Applied Mechanics and Materials351-352: 50–54.
23.
KimJSKwarkJJohC, et al. (2015) Headed stud shear connector for thin ultrahigh-performance concrete bridge deck. Journal of Constructional Steel Research108: 23–30.
24.
KruszewskiDWilleKZaghiAE (2018) Push-out behavior of headed shear studs welded on thin plates and embedded in UHPC. Engineering Structures173: 429–441.
25.
LaiZCWengXYYangXQ, et al. (2024) Shear behavior and design of headed studs embedded in steel-UHPC composite structures. Structures59: 105788.
26.
LiMShaoXDCaoJH, et al. (2021) Performance of experimental and theoretical analysis on shear short headed studs embedded in UHPC. China Journal of Highway and Transport34(8): 191–204, (in Chinese).
27.
LiCChenBCHuWX, et al. (2023a) Calculation of shear bearing capacity, slip and stiffness of headed studs in steel-UHPC composite slab. Engineering Mechanics40(6): 110–121, (in Chinese).
28.
LiYHWangSDZhaoGF, et al. (2023b) Shear behavior of short studs in steel-thin ultrahigh-performance concrete composite structures. Case Studies in Construction Materials19: e02423.
29.
LiuYMZhangQHMengWN, et al. (2019) Transverse fatigue behaviour of steel-UHPC composite deck with large-size U-ribs. Engineering Structures180: 388–399.
30.
MagureanuCSosaINegrutiuC, et al. (2012) Mechanical properties and durability of ultra-high-performance concrete. ACI Materials Journal109(2): 177–184.
31.
MoXDZengWQLiaoJJ, et al. (2022) Flexural behavior of hybrid FRP-concrete-steel double-skin tubular beams with PBL shear connectors. Engineering Structures254: 113840.
32.
NieJG (2011) Steel-concrete Composite Bridges. Beijing, China: China Communications Press. (in Chinese).
33.
OehlersDJBradfordMA (1999) Elementary Behaviour of Composite Steel and Concrete Structural Members. Oxford, England: Butterworth-Heinemann.
34.
QiJNHuYQWangJQ, et al. (2019) Behavior and strength of headed stud shear connectors in ultra-high performance concrete of composite bridges. Frontiers of Structural and Civil Engineering13(5): 1138–1149.
35.
RussellHGGraybealBA (2013) Ultra-high Performance Concrete: A State-Of-The-Art Report for the Bridge Community. Federal Highway Administration. Publication No. FHWA-HRT-13-060.
36.
SemendaryAAStefaniukHLYamoutD, et al. (2022) Static performance of stud shear connectors and UHPC in deck-to-girder composite connection. Engineering Structures255: 113917.
37.
SunQLLuXYNieX, et al. (2017) Experimental research on tensile and shear behaviour of the interface between non-steam-cured UHPC and steel plate structure. Engineering Mechanics34(9): 167–174, (in Chinese).
38.
T/CBMF37/T/CCPA7 (2018) Fundamental Characteristics and Test Methods of Ultra-high Performance Concrete. Beijing, China: China Building Material Industry Publishing House. (in Chinese).
39.
TengJGYuTWongYL (2004) Behavior of hybrid FRP concrete-steel tubular columns. In: Proceedings of 2nd International Conference on FRP Composites in Civil Engineering, Adelaide, Australia. Hoboken, NJ: Taylor & Francis, 811–818.
40.
TengJGYuTWongYL, et al. (2007) Hybrid FRP concrete-steel tubular columns: concept and behavior. Construction and Building Materials21(4): 846–854.
41.
TengJGYuTFernandoD (2012) Strengthening of steel structures with fiber-reinforced polymer composites. Journal of Constructional Steel Research78: 131–143.
42.
WangJYGuoJYJiaLJ, et al. (2017) Push-out tests of demountable headed stud shear connectors in steel-UHPC composite structures. Composite Structures170: 69–79.
43.
WangJQXuQZYaoYM, et al. (2018) Static behavior of grouped large headed stud-UHPC shear connectors in composite structures. Composite Structures206: 202–214.
44.
WangJQQiJNTongT, et al. (2019) Static behavior of large stud shear connectors in steel-UHPC composite structures. Engineering Structures178: 534–542.
45.
WeiCZhangQHZhouYL, et al. (2022) Static and fatigue behaviors of short stud connectors embedded in ultra-high performance concrete. Engineering Structures273: 114888.
46.
WuFWFengYPDaiJ, et al. (2022) Study on mechanical properties of stud shear connectors in steel-UHPC composite structures. Engineering Mechanics39(2): 222–234, (in Chinese).
47.
XiaoRCSongCLSunB, et al. (2022) Design and experimental study of a replaceable steel UHPC composite bridge deck. Structures40: 1107–1120.
48.
XuMWilleK (2015) Fracture energy of UHP-FRC under direct tensile loading applied at low strain rates. Composites Part B80: 116–125.
49.
XuCXiaoHYangCY (2022a) Analysis of shear behavior of short group studs in ultra-high performance concrete composite bridge deck. Journal of Central South University (Science and Technology)53(11): 4359–4371, (in Chinese).
50.
XuQZSebastianWLuKW, et al. (2022b) Development and performance of innovative steel wedge block-crossed inclined stud-UHPC connections for composite bridge. Journal of Structural Engineering148(9): 04022128.
51.
XueJQBriseghellaBHuangFY, et al. (2020) Review of ultra-high performance concrete and its application in bridge engineering. Construction and Building Material260: 119844.
52.
YooDYLeeJHYoonYS (2013) Effect of fiber content on mechanical and fracture properties of ultra high performance fiber reinforced cementitious composites. Composite Structures106: 742–753.
53.
YuTWongYLTengJG, et al. (2006) Flexural behavior of hybrid FRP-concrete-steel double-skin tubular members. Journal of Composites for Construction10(5): 443–452.
54.
ZhaoJL (2017) Behaviour and Modelling of Largescale Hybrid FRP-Concrete-Steel Double-Skin Tubular Beams with Shear Connectors. PhD Thesis. Hong Kong, China: The Hong Kong Polytechnic University.
55.
ZhaoJLTengJGYuT, et al. (2016) Behavior of large-scale hybrid FRP-concrete steel concrete steel double-skin tubular beams with shear connectors. Journal of Composites for Construction20(5): 4016015.
56.
ZhaoQHuangGMXuC, et al. (2021) Push-out behavior of short headed stud connectors in steel-ultra high performance concrete composite deck. KSCE Journal of Civil Engineering25(7): 2640–2650.
57.
ZhouMLuWSongJ, et al. (2018) Application of ultra-high performance concrete in bridge engineering. Construction and Building Materials186: 1256–1267.
