| Since the introduction of high-speed rail technology in China, China’s high-speedrail industry is rapid development, according to the latest data of China’s high-speed railmileage is more than ten thousand, accounted for first in the world. Such a longhigh-speed rail mileage will across many mountains and rivers, roads, so high-speedrailway bridge erection is an unavoidable problem.According to the350km/h high-speed rail standards under the optimized analysisisolation beating of bridge seismic response of straight and curve bridges cross.1. First outlined the bridge seismic isolation technology, design principle anddetails of the isolation technology principle, system composition and railway bridgeseismic isolation system.2. According to the national standard350km/h high-speed rail cross, using finiteelement software ANSYS to establish the bridge model, and define the boundaryconditions.3. Ground motion input selection, the design is applicable for two sites, eightdegree seismic, seismic input for3D, then according to the seismic condition, carries onthe adjustment to the ground motion, the comprehensive comparison and analysis of thedomestic and foreign many ground motion time history, the final selection of theEL-Centro wave, Wenchuan seismic wave and artificial seismic wave as the study of theseismic input.4. The use of bridge ANSYS model established, simulation analysis. To simulatethe pot rubber bearing, lead rubber bearing and sliding friction viscoelastic damperbearing combination, in three different earthquake wave: EL-Centro, Wenchuan seismicwave and artificial seismic wave, bearing itself as well as the bridge span moment andpier bottom value.5. Isolation bearing of bridge and the parameters of friction damper optimization,the bridge is still in high-speed rail standard span, were the lead rubber bearing,combination, plate type laminated rubber bearing and friction damper plate typelaminated rubber bearings and viscous dampers combination applied research. |
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