Investigation of U-bar joints between precast bridge decks loaded in combined bending and shear

•Mechanical properties of U-bar joints subjected to bending/shearing were studied.•T-shape joint influences on the crack resistances of concrete interfaces were studied.•A formula is proposed for the estimation of the bearing capacities of U-bar joints.•Analyses were based on experimental measuremen...

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Bibliographic Details
Published in:Structures (Oxford) 2020-10, Vol.27, p.37-45
Main Authors: Di, Jin, Han, Bin, Qin, Fengjiang
Format: Article
Language:English
Subjects:
Bearing capacity formula
Bridge engineering
Combined bending–shear load
T-shaped joint
U-bar connection
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Summary:•Mechanical properties of U-bar joints subjected to bending/shearing were studied.•T-shape joint influences on the crack resistances of concrete interfaces were studied.•A formula is proposed for the estimation of the bearing capacities of U-bar joints.•Analyses were based on experimental measurements and finite element simulations. This study proposes two types of U-bar joints: rectangular joints with stainless steel ties and T-shaped joints. The mechanical properties of four joint specimens subjected to combined bending and shear forces were studied experimentally and numerically. The T-shaped joint details effectively increased the cracking load and controlled the development of interface cracks. The bearing capacity of the four joint details were similar. Furthermore, a formula to estimate the bearing capacities of the T-shaped U-bar lap joint specimen is proposed, and its accuracy is verified.
ISSN:2352-0124
2352-0124
DOI:10.1016/j.istruc.2020.05.041