Shiwen Han , Gang Xiao , Wei Tan , Peirong Mai , Ao Zhou , Jing Yu , Jinping Ou
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引用次数: 0
Abstract
Due to steel corrosion and shortage of freshwater and river sand for marine infrastructure, combing fiber-reinforced polymer (FRP) bars and seawater sea-sand concrete (SSC) has garnered increasing attention. Nevertheless, applying this combination in column is prevented by brittle failure and inferior compressive performance of FRP bars, and inferior confinement efficiency of conventional pultruded FRP stirrups. Here, a novel hybrid reinforcing system composed of longitudinal steel-FRP composite bars (SFCBs) and closed-type FRP stirrups was adopted for SSC column to obtain comparable mechanical behavior to steel bars reinforced concrete column. To overcome the inapplicability of existing design method, a simplified equivalent design method was explored and verified for hybrid-RC column. Results demonstrate that, in comparison with longitudinal steel bars, equal-stiffness longitudinal SFCBs offer comparable contribution for column under compression. Linear elastic properties and high strength of closed-type FRP stirrups result in excellent confinement, significantly enhancing the ductility by 58–163%. The desirable mechanical contribution of longitudinal SFCBs and the excellent confinement provided by FRP stirrups provide the foundation for establishing the equivalent design method. Equivalent-designed hybrid-RC column exhibits equivalent or even better compression behavior than steel-RC column. This equivalent method offers simple and safe design strategies for SSC column with hybrid reinforcing system.
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.