【摘要】 结合一座大跨度连续刚构桥实例,分析了在地震作用下该种桥梁的地震反应,通过改造桥梁形式,减小结构地震力.分析表明,刚构桥的基本周期较短,地震力较大;改造成采用减隔震支座的连续梁桥后,墩柱的地震力明显下降,桩基的轴力也下降明显,但是对于桩基的弯矩减小不大,但是整体上改造后对抗震有利.更多还原

【Abstract】 in this paper,combining with the department of a large span continuous rigid frame bridge as an example,analyzed this kind of the seismic response of the bridge under seismic action,through the bridge form,reduce the earthquake force of the structure. Through the analysis found that bridge the basic cycle is shorter,seismic force is bigger; Modified into isolation bearing is continuous girder bridge,significantly lower pier earthquake force,axial force of pile foundation also decreased significantly,but for the pile bending moment of the decrease is not big,but good for seismic after overall transformation.更多还原