The article presents the analysis of complex stress states in the concrete structure of grain silos, caused by non-centric emptying. The authors present a combination of loads from the pressure of bulk solid on the silo chamber according to Eurocode 1, Part 4 [11], which should be taken into account when emptying on large eccentricities in action assessment class 3 (AAC3) silos. For the example of a cylindrical wheat silo with a height of 25 m and a diameter of 10 m, the researchers carried out an analysis regarding the impact of the size of the eccentric discharge outlet on the distributions of forces and bending moments in a reinforced concrete wall.
This paper presents the results of experimental and theoretical analyses concerning thermal and moisture effects on a model cylindrical silo. The experimental studies were conducted on a thin‐walled cylindrical silo model bin of diameter 800 mm and total depth 2500 mm, filled with mustard seeds. For the purposes of modeling thermal changes in the particles, the external surface of the model silo bin was exposed to heating by electrical wires and then allowed to cool naturally, before filling the bin. The experimental results were compared with the numerical simulation results performed on the basis of equations of coupled heat and moisture transfer in the particulate solid and concrete wall, with the use of experimentally determined bulk solid properties.
The article discusses the possibility of utilization of both waste from CHP plants (Combined heat and power plants), i.e. fly ash, and PET plastic waste (polyethylene terephthalate), through processing into lightweight aggregate used to construct reinforced concrete beam elements to protect the natural environment. Properties of the utilized lightweight artificial aggregates are presented. Selected results of experimental tests in the area of load-bearing capacity and deformability of reinforced concrete beams made in the model scale are presented. An analysis of tests showed that beam elements made with artificial aggregate, despite its lower resistance to crushing, do not differ in terms of their load-bearing capacity compared to reinforced concrete beams made with recycled aggregate, with better flexural strength properties in certain cases.
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