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Pro129

EXPERIMENTAL STUDY ON A FULL-SCALE 30M SPAN UHPC BOX GIRDER



Author(s): Baochun Chen, Xilun Ma, Jialiang Zhou and Douglas Paul Gauvreau
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: 69-84
Total Pages: 16
Language : English


Abstract: The first highway ultra-high performance concrete (UHPC) girder bridge in China is an
overpass bridge, which has a span arrangement of 4×30m with a total length of 127 m. Taking
this bridge as the prototype, structure design of the 30m UHPC continuous girder is optimized.
Following the optimized structure, a 30 m UHPC box girder was fabricated. It was simply-
supported and tested under two concentrated force at the mid-span. In the test, counterweight
blocks of truck cranes were employed for loading and acquired successfully. Using ABAQUS
software, a FEM is established and verified by the test results. From the test and FEM analysis,
the whole loading process of the girder can be divided into five stages, i.e., elastic phase,
cracking phase, reinforcement yielding phase, prestressed strand yielding phase and decline
phase. Test results show that the optimized girder meets the design requirements of
serviceability limit state and ultimate limit state. The computed and tested ultimate loads are
1837 kN and 1815 kN, respectively, much larger than the design ultimate load 697 kN. The
plane-section assumption of the girder is verified by the test. Finally, the tested results of cracks
are described, they distributed mainly on the mid-span region of 1000 cm. The crack of the
girder developed continuously in number, width and length with the increase of the load.


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


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