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- W3136343347 abstract "The rate-sensitive properties of ultra-high performance concrete (UHPC) subjected to flexural and direct tensile loads were investigated. Dynamic flexural tests were performed by means of a drop hammer impact machine, whereas a servo-hydraulic system was utilized to conduct direct tension tests. The absorbed energy of the UHPC specimens under flexure increased from 0.74 to 4.49 J as the input energy varied from 6.7 to 67 J. The load-bearing capacity and maximum flexural deformation exhibited identical trends as the input energy increased. The high-speed tensile properties, including strength, ductility, and energy dissipation capacity, improved upon increasing the strain rate up to 100 s-1. A nonuniform distribution of the deformation of UHPC specimens under high-speed tension was observed by identifying the zones of strain localization (near crack), uniform strain (far field), and shear lag (transition zone in between) using digital image correlation. The full-field data of displacement, strain, and strain rates were obtained and quantitatively evaluated. The results indicated that multiple mechanisms were involved in the rate-dependent behavior of the UHPC specimens." @default.
- W3136343347 created "2021-03-29" @default.
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- W3136343347 date "2021-07-01" @default.
- W3136343347 modified "2023-10-13" @default.
- W3136343347 title "Tensile and Flexural Behavior of Ultra-High Performance Concrete (UHPC) under Impact Loading" @default.
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- W3136343347 doi "https://doi.org/10.1016/j.ijimpeng.2021.103866" @default.
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