地震作用下斜交桥桥面旋转研究进展

Recent Development in Deck Rotation of Skewed Bridge Under Ground Motions

中文关键词:斜交桥  地震响应  桥面旋转  横向挡块  支座

英文关键词:skewed bridge  seismic response  deck rotation  transverse retainers  bearings

中文摘要:

      在历次破坏性地震中，斜交桥遭到严重损坏，其桥面普遍存在绕竖轴转动的现象。桥面的转动增大了上部结构的横向位移和挡块、支座以及桥墩破坏发生的几率。针对地震作用下斜交桥存在的桥面旋转现象，对其发生的机理，结构参数、支座和横向挡块对桥面旋转的影响，斜交桥限位措施等研究进行回顾和总结，并对目前在斜交桥桥面旋转研究方面亟待解决的问题进行展望。

英文摘要:

      In past destructive earthquakes, skewed bridges were seriously damaged, and the deck of skewed bridges rotated generally about the vertical axis. The deck’s rotation not only increases the transverse displacement of superstructure but also increases the failure probability of shear keys, bearings and piers. Based on the phenomenon of skewed bridges deck’s rotating under earthquake action, the occurrence mechanism of the deck rotation, the influence of structure parameter, bearings and shear keys on the skewed bridges deck’s rotation responses, limit displacement measures of skewed bridges and so on are reviewed and summarized systematically. Finally, the problems urgently to be solved in skewed bridges deck’s rotation research are presented.