Experimental research on the behaviour of short headed stud in non-steam-cured UHPC under tensile and shear load

Author(s) : Q. Sun, J. Fan, X. Lu, Z. Wang
Paper category : Proceedings
Book title : UHPFRC 2017 Designing and Building with UHPFRC: New large-scale implementations, recent technical advances, experience and standards
Editor(s) : F. Toutlemonde & J. ResplendinoT.Ch.
Print-ISBN : 978-2-35158-166-7
e-ISBN : 978-2-35158-167-4
Publisher : RILEM Publications SARL
Publication year : 2017
Pages: 461 - 470
Total Pages : 10
Language : English

Abstract: In recent years, Ultra-High Performance Concrete (UHPC) is more and more widely applied in composite construction and steel structure strengthening due to its super high strength and ductility. However, the mechanical performance of the short headed stud in the interface between UHPC and steel plate hasn’t been clearly revealed, which is quite different from that in regular concrete. In this paper, a series of pure-tensile and push-out tests were conducted to investigate the ultimate bearing, crack propagation and failure mode of short headed studs in UHPC. The results showed that the capacity and ductility were both much higher than studs in regular concrete. Besides, current design methods largely underestimate the capacity of UHPC cone failure, thus an assumption of variable angle failure surface mechanism and a modified formula considering the steel fiber quantity were raised based on the experimental results. Finally, a load-slip function was calibrated through the push-out results, which could further be applied in finite element analysis as spring elements.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00