摘要
针对目前减隔震技术在我国桥梁领域的推广应用,建立一座隔震桥梁,基于增量动力分析(IDA)方法研究了桥梁在单条地震动下的动态响应,得到了桥墩以及支座在地震动作用下的响应曲线(IDA曲线)。以桥墩位移延性系数和支座剪应变作为损伤指标,对IDA曲线进行损伤状态区间的划分。通过IDA曲线发现隔震桥梁具有良好的抗震性态,支座比桥墩更容易损伤。最后,将支座和桥墩综合考虑计算得到桥梁结构整体易损性(DS)。
Aiming at the popularization and application of the anti-seismic technology in our country＇s bridge field, this paper establishes a isolated bridge, based on incremental dynamic analysis （IDA） method and studies the dynamic response of the bridge under single ground motions, finally gets the response curve （IDA curve） of the pier and abutment under ground motions. Using the displacement ductility factor of the pier and abutment shear strain as the damage index, this paper divides the damage state interval of IDA curves. According to the IDA curves, we can find the isolated bridge has a good seismic performance, and the bearing is more easy to damage than the pier. Finally, we calculate the overall vulnerability damage state of the bridge by considering the stand and piers as a whole.
出处
《华南地震》
2014年第B04期66-70,共5页
South China Journal of Seismology
关键词
隔震桥梁
增量动力分析
地震
损伤指标
整体易损性
Isolated bridge
Incremental dynamic analysis
Earthquake
Damage index
Overall Vulnerability
