Numerical simulation study on impact load resistance of super long reinforced concrete slabs with high cold and large temperature difference
It studies the numerical simulation of the impact load resistance of ultra long reinforced concrete slabs under high cold and large temperature difference conditions.The results show that the system energy is greatly affected by the impact speed,followed by the in-fluence of preload,and the least affected by the reinforcement ratio.When the impact speed is within the range of 3.0 m/s to 10.5 m/s,the system energy changes by from 2.09%to 1.41%.When the speed increases from 0 m/s to 3.0 m/s and the preload increases from 0 kN/m2 to 2.5 kN/m2,the vertical displacement of the plate center increases from 3.20 mm to 3.46 mm,an increase of 8.12%.When the speed increas-es from 3.0 m/s to 5.5 m/s,the vertical displacement of the plate center increases from 12.97 mm to 13.75 mm,with an increase of 6.01%.When the impact speed increases to 10.5 m/s,the displacement time history curve shows that the vertical displacement of the plate center increases from 56.12 mm to 56.62 mm,with an increase of 0.89%.When applying preload to reinforced concrete slabs,as the preload in-creases,the vertical displacement of the slab center increases after impact,but the amplitude of the increase is small.The preload has a small impact on the vertical displacement of the slab center.When the impact speed increases from 3.0 m/s to 5.5 m/s under the same other conditions,the vertical displacement of the plate center increases by 299.42%.When the impact speed increases from 5.5 m/s to 10.5 m/s,the vertical displacement of the plate center increases by 319.29%.The vertical displacement of the plate center is most affected by the im-pact speed,and is less affected by the pre imposed load and reinforcement ratio.
high cold and large temperature differencereinforced concrete slabnumerical simulationimpact resistance load
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