| 用GPS和随机减量技术对悬索桥实时监测 |
| |
| 引用本文： | 徐良,过静珺. 用GPS和随机减量技术对悬索桥实时监测[J]. 清华大学学报(自然科学版), 2002, 42(6): 822-824 |
| |
| 作者姓名： | 徐良 过静珺 |
| |
| 作者单位： | 清华大学土木工程系,北京,100084 |
| |
| 基金项目： | 国家自然科学基金资助项目 ( 4 98710 6 5 ) |
| |
| 摘 要： | 为连续实时监测大跨桥梁的抗风、抗震重要参数——位移、转角和频率 ,通过比较几种桥梁传统的位移测量方法 ,提出利用 GPS实时监测悬索桥位移和转角的新方法。介绍了其测量系统和特点 ,在此基础上 ,利用基于随机减量的 FFT时域模态识别技术对虎门大桥进行实时模态分析 ,并同有限元数值分析结果和加速度计的实地测量结果相比较 ,得出 GPS技术与随机减量技术相结合可实现大桥连续实时监测的结论
|
| 关 键 词： | 悬索桥 实时监测 随机减量 GPS 模态识别 |
| 文章编号： | 1000-0054(2002)06-0822-03 |
| 修稿时间： | 2000-11-15 |
On-line monitoring of suspension bridges using the GPS and the random decrement technique |
| |
| XU Liang,GUO Jingjun. On-line monitoring of suspension bridges using the GPS and the random decrement technique[J]. Journal of Tsinghua University(Science and Technology), 2002, 42(6): 822-824 |
| |
| Authors: | XU Liang GUO Jingjun |
| |
| Abstract: | A new measurement method using the GPS was introduced for on-line monitoring of a long-span-bridge's wind-resistant and seism-resistant parameters. The GPS-based measurement system was described by comparing several displacement measure techniques. A time domain modal identification method was used with the GPS data for real time monitoring of the Humen suspension bridge. The results compared well with those obtained from 3-D FEM numerical analysis and field measurements using accelerometers. The results show that the GPS technique combined with the random decrement technique can be used for on-line monitoring of long span bridges. |
| |
| Keywords: | suspension bridge on-line monitoring random decrement GPS modal identification |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
