PUSH-OUT TEST OF LARGE STUD SHEAR CONNECTORS EMBEDDED IN UHPC

Author(s): Jianan Qi, Jingquan Wang and Qi Wang
Paper category: Proceedings
Book title: Proceedings of the 2nd International Conference on UHPC Materials and Structures (UHPC2018-China)
Editor(s): Caijun Shi and Baochun Chen
ISBN: 978-2-35158-219-0
e-ISBN: 978-2-35158-220-6
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 665-673
Total Pages: 9
Language : English

Abstract: The static behavior of large stud shear connectors embedded in ultra-high performance
concrete (UHPC) was investigated via an experimental study. A total of 18 push-out test
specimens were tested with various parameters including stud diameter, stud aspect ratio,
concrete strength, and concrete slab thickness. Two types of headed studs with the diameter of
22mm and 30mm were used. Test results showed that extensive splitting cracks propagated on
the concrete slab for the normal strength concrete specimen whereas no appreciable cracks
were found for the UHPC specimen with 30 mm studs. This phenomenon indicates that
UHPC matches well with large studs. The shear strength, shear stiffness and ductility of a
30mm stud are approximately 15%, 45% and 60% higher than that of a 22mm stud,
respectively. Stud aspect ratio and concrete slab thickness showed no obvious influence on
the static behavior of the test specimens and short stud shear connectors with an aspect ratio
of 2.3 could develop full strength in UHPC slabs.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00