The bending performance of reinforced beam containing steel fiber, polyvinyl alcohol (PVA) fiber, and calcium carbonate whisker after high temperature was studied. With the introduction of steel-PVA-whisker hybrid fibers, the thermal bursting and cracking of the reinforced beams were alleviated significantly. The peak load of reinforced beam was significantly increased with the introduction of 1.5 vol% steel fiber and 0.5 vol% PVA fiber. While the introduction of whisker led to decreased peak load and shear failure pattern of the beams, due to the decomposition of whisker at high temperature. The microscopic mechanism of action of fiber and whisker is discussed. A prediction model for the shear bearing capacity of reinforced beams with hybrid fibers after high temperature was proposed, considering the action of multiscale fibers and high temperature.calcium carbonate whisker, calculation of bearing capacity, high temperature, polyvinyl alcohol fiber, reinforced beam, steel fiber Discussion on this paper must be submitted within two months of the print publication. The discussion will then be published in print, along with the authors' closure, if any, approximately nine months after the print publication.
This paper investigated into the application of fiber-enhanced asphalt mixture in surface layer of the large longitudinal slope pavement of Xi-Sang Highway. Asphalt mixture with and without polyester fiber were used. Focus is on resistance of deformation at high temperature and flexibility at low temperature. Fiber-enhanced asphalt mixture with dynamic stability above 7000 passes/mm indicated excellent rutting resistance. The high temperature dynamic modulus of fiber-enhanced asphalt mixture was much higher than conventional SBS modified asphalt mixture. Three-point blending test result indicated that the maximum flexural strain of fiber-enhance asphalt mixture reached 4180μm/m. It was concluded that fiber-enhanced asphalt mixture was suit to be used in surface layer of the large longitudinal slope pavement of Xi-Sang Highway.
This paper is mainly about the optimized configuration about highway passenger station.Firstly it expounds the introduction of the paper.Secondly it uses regression model and object designing model to have a configuration of transport lines. Then it has an empirical analysis which is based on the transport line from huai'an to nanjing and gets the schedule.At last it has an evaluation on the schedules.
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