SHEAR BEHAVIOR OF JOINTS IN PRECAST UHPC SEGMENTS BRIDGES

Author(s): Shuaifei Xuan , Hui Zheng and Xuejiao Liang
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: 717-724
Total Pages: 8
Language : English

Abstract: The structural behavior of precast concrete segmental bridges largely depends on the
behavior of the joints between segments. To study the shear strength and behaviour of the
joints in UHPC-PSB, tests and FE analysis were conducted. Ten specimens were tested under
static shear loading conditions to investigate the limit states of UHPC keyed joints. The
parameters included flat and keyed joints, with epoxy and without, the level of prestressing.
Numerical models were also developed to predict the shear capacity of shear keys with
various values of normal pressure. The ultimate shear strength of keyed joint depends on the
concrete compressive strength. However, it is not proportional to concrete compressive
strength. An increase of normal pressure increases the shear capacity of the joint with the rate
of frictional coefficient and contact surfaces. A modified design model has been proposed
where the effects of concrete compressive strength have been taken into account. The shear
bearing capacity of the proposed model has provided better accuracy in comparison with the
existing formulas for segmental bridges.

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