摘要
Abstract
In the long-span continuous rigid frame bridge with high piers,the approach part often uses the common con-tinuous beam bridge.Compared with the long-span continuous rigid frame bridge with high piers,the natural vibration frequency of the ordinary continuous beam bridge is relatively high,resulting in a large difference in the dynamic performance of the adjacent bridges,and the connection may be seriously damaged under the earthquake.In view of the above problems,this paper establishes a finite element model of the high-pier long-span continuous rigid frame bridge,considers the continuous beam approach bridge connected with it,carries out elastic-plastic dynamic analysis of the main bridge,approach bridge and transition pier,and fo-cuses on the seismic performance of the adjacent bridge connection.The analysis shows that due to the huge difference in the dynamic characteristics of adjacent bridges,the deformation amplitude and phase of adjacent bridge links under seismic action are significantly different,and the deformation amplitude of high pier long-span continuous rigid frame bridge under seismic action is far greater than that of continuous bridge,the main beam of adjacent bridge links may be impacted,and the bearing on transition pier may also be seriously dam-aged.关键词
抗震/主桥/引桥/连续刚构桥/地震响应Key words
anti-seismic/main bridge/approach bridge/continuous rigid frame bridge/seismic response分类
交通工程
