Influence of Steel-concrete Reinforcing Ring on Dynamic Characteristics of Exposed Steel Corrugated Arch Culvert
The dynamic characteristics of steel corrugated arch culvert with steel-concrete reinforcing rings are analyzed by hammering test and numerical simulation.Firstly,the longitudinal,transverse and local vibration transmission characteristics are tested based on hammering test.Then,a finite element model is used to calculate structural vibration response and its reliability is verified.The influence of the structure with or without reinforcing ribs,the spacing of reinforcing ribs,and the filling of concrete with reinforcing ribs is then numerically analyzed.Results show that the particle damping method is effective in controlling vibration and noise within a wide frequency range.The integrity and overall stiffness of the structure are significantly improved by the reinforcing rings.The vibration isolation capability is significantly improved.Compared with the cases with or without the reinforcing rings,the acceleration frequency response attenuation at the same distance from the measuring point is increased by about 30dB.Both the hollow steel reinforcing ring and the steel-concrete reinforcing ring play a positive role in vibration attenuation,the vibration isolation effect of the steel-concrete reinforcing ring is significantly better than that of the hollow steel reinforcing ring.
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