论文部分内容阅读
用时程分析法分析了采用板式橡胶支座的双层高架桥的地震反应,双层高架桥在地震作用下顺桥向的地震反应小于横桥向的地震反应。在采用了板式橡胶支座的双层高架桥中,桥梁横向地震反应的减震率要比桥梁顺桥向的减震率有效,在双层高架桥中使用板式橡胶支座,桥梁减震率效果明显。然而值得注意的是,顺桥向墩柱的弯矩却呈增大趋势,这样的现象在高架桥的设计计算当中值得注意。通过分析可知,普通公路桥梁采用板式橡胶支座具有一定的减震率,横桥向减震率比较明显。
The seismic response of double-decked viaduct with rubber bearing plate is analyzed by time-history analysis. The seismic responses of double-decked viaduct under seismic action are less than that of transverse seismic response. In the double-deck viaduct with rubber bearing plate, the damping rate of lateral seismic response of bridge is more effective than that of the bridge along the bridge direction, and the plate rubber bearing is used in double-deck viaduct, the damping effect of the bridge is obvious . However, it is noteworthy that the bending moment toward the pier along the bridge has been increasing, which is worth noting in the design and calculation of the viaduct. Through the analysis we can see that common highway bridge plate rubber bearing has a certain degree of shock absorption, horizontal bridge damping more obvious.