Highway Of High Pier And Long-span Continuous Bridge Resonance Research And Prevention Measures

This paper studies involving continuous system including continuous rigid frame bridge,continuous beam, continuous beam and rigid frame composite system three bridge, because ofits similar structure, so called continuous bridge. Long span continuous bridge because of itsstrong span ability, good seismic performance, design and construction are more mature, withthe economic advantages of good, in our country has a broad application, is often preferred,especially in the western hilly and gully region. But because of the practical needs, thecontinuous bridge span increasing, more and more fiber structure refinement, bridge structurefundamental frequency is more and more low, making the bridge resonance problem isbecoming more and more serious, its effect on the high pier and long-span continuous bridgeitself safety is more and more big. Highway of high pier and long-span continuous bridgeresonance problems caused by academic and engineering circles, research system and itseffect analysis of continuous bridge resonance has very important theory value andengineering value for the highway of high pier and long span.The Shaanxi province3high pier and long-span continuous bridge project in ShaanxiProvince,3high pier and long-span continuous bridge as the prototype of modeling of finiteelement analysis, the following work.（1）The determination method of bridge with high pier and long span bridge couplingresonance occurs.（2）The calculation module using the vehicle bridge coupling development two times, withthe help of ANSYS a detailed study of the multi vehicle speed train different excitationfrequency, different vehicle speed pier and girder section under different conditions ofmoving vehicle bridge coupling vibration displacement, dynamic deflection, dynamicacceleration, dynamic moment parameters such as response rule.（3）Comparison of resonance dynamic responses of highway bridge and "generalspecification for" static load specified (1+μ) static response value（4）The installation of viscous fluid damper (FVD) effect of continuous bridge vehiclebridge coupling resonance response of the system to the high pier and long span, proposesadding fluid viscous dampers (FVD) to reduce the new method of bridge resonance responseof high pier and long-span continuous system.