Preliminary Design of a Steel–UHPFRC Composite Truss Arch Bridge and Model Tests of K-Joints
The preliminary design and comparisons of major technical and economic indicators between a steel-ultrahigh-performance fiber-reinforced concrete (UHPFRC) composite truss (SUCT) arch bridge and a concrete-filled steel tubular (CFST) arch bridge with both spans of 375 m are carried out in this study. Compared with the CFST arch bridge, the SUCT arch bridge can improve the durability of the bridge and has advantages in terms of steel consumption, self-weight, carbon emission, and other indicators due to the use of UHPFRC with high compressive strength as the arch ribs to bear the large axial forces. Adoption of the cyclic construction method for the SUCT arch bridge with two closure processes results in a total cost basically equivalent to that of the CFST arch bridge. For the K-joints in the connection area of the UHPFRC arch ribs and steel web members, a new hybrid connection form of “perforated shear connectors (PBL) + headed studs” is proposed. Loading tests in three directions in plane, pull-out tests, and parameter analysis are carried out. The experimental results show that the new hybrid connector is reasonable for the K-joints, which has advantages of large stiffness, short force transmission path, and high efficiency, and can ensure the continuity of steel fibers. Moreover, the new hybrid connector displays good shear performance, pull-out performance, and high bearing capacity. Based on the results of parameter analysis, the sensitivity of the pull-out bearing capacity to the three variables is compressive stress in the arch rib, followed by the tensile and compressive strengths of UHPFRC.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/oclc/32947845
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Supplemental Notes:
- © 2022 American Society of Civil Engineers.
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Authors:
- He, Guang
- Shao, Xudong
- Chen, Yubao
- Ouyang, Ping
- Zhang, Dongbo
- Publication Date: 2022-10
Language
- English
Media Info
- Media Type: Web
- Features: References;
- Pagination: 04022090
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Serial:
- Journal of Bridge Engineering
- Volume: 27
- Issue Number: 10
- Publisher: American Society of Civil Engineers
- ISSN: 1084-0702
- Serial URL: http://ojps.aip.org/beo
Subject/Index Terms
- TRT Terms: Arch bridges; Bridge design; Steel fibers; Truss bridges; Ultra high performance concrete
- Subject Areas: Bridges and other structures; Highways; Materials;
Filing Info
- Accession Number: 01858805
- Record Type: Publication
- Files: TRIS, ASCE
- Created Date: Sep 26 2022 9:10AM