Zhiyuan Chen , Xin Wang , Lining Ding , Kaidi Jiang , Fusheng Niu , Hua Wang , Zhishen Wu
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引用次数: 0
Abstract
The novel ultra high performance concrete (UHPC) reinforced with macro basalt fibers (MBFs), which has better performance of fiber distribution, electrochemical corrosion resistance and chloride resistance after cracking compared to UHPC with steel fibers, conforms to reinforce or repair marine structures. The interfacial performance between UHPC with MBFs and normal concrete (NC) urgently needs to be studied. Six kinds of UHPC, which were reinforced with MBFs, steel fibers and polypropylene (PP) fibers with various contents, were designed. A Double-sided direct shear test was conducted to study the effects of fibers in UHPC on the interfacial performance between UHPC and NC with different interface treatments. According to the test results, the interfacial shear strength (IFSS) between UHPC and NC increased and gradually approached the upper limit with the increasing fiber-UHPC bonding strength, content, aspect ratio and modulus of fibers. The interfaces processing method had a more significant influence on the IFSS compared to the fibers in UHPC. The group with two grooves had the highest IFSS of 6.57 MPa, representing a 242 % increase compared to the group with smooth interfaces. Semi empirical formulas fully considering the effects of fibers in UHPC were proposed based on tests results and cohesion, and it showed a reliable calculation accuracy with the prediction errors of most groups which were less than 15 %.
期刊介绍:
Engineering Structures provides a forum for a broad blend of scientific and technical papers to reflect the evolving needs of the structural engineering and structural mechanics communities. Particularly welcome are contributions dealing with applications of structural engineering and mechanics principles in all areas of technology. The journal aspires to a broad and integrated coverage of the effects of dynamic loadings and of the modelling techniques whereby the structural response to these loadings may be computed.
The scope of Engineering Structures encompasses, but is not restricted to, the following areas: infrastructure engineering; earthquake engineering; structure-fluid-soil interaction; wind engineering; fire engineering; blast engineering; structural reliability/stability; life assessment/integrity; structural health monitoring; multi-hazard engineering; structural dynamics; optimization; expert systems; experimental modelling; performance-based design; multiscale analysis; value engineering.
Topics of interest include: tall buildings; innovative structures; environmentally responsive structures; bridges; stadiums; commercial and public buildings; transmission towers; television and telecommunication masts; foldable structures; cooling towers; plates and shells; suspension structures; protective structures; smart structures; nuclear reactors; dams; pressure vessels; pipelines; tunnels.
Engineering Structures also publishes review articles, short communications and discussions, book reviews, and a diary on international events related to any aspect of structural engineering.