| 多跨系杆拱桥吊杆疲劳性能研究 |
| Fatigue Analysis of Tied Arch Bridge Suspenders |
| 投稿时间：2009-10-27 |
| 中文关键词:拱桥 吊杆 疲劳 蒙特卡罗方法 累计损伤 |
| 英文关键词:arch bridge suspender fatigue Monte Carlo method accumulative damage |
| 基金项目:交通部西部交通建设科技资助项目（2008 318 494 52） |
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| 中文摘要: |
| 以某三跨系杆拱桥为例，提出了一种拱桥吊杆的疲劳分析方法。对桥梁结构建立有限元模型求得各吊杆的索力影响线。依据交通量调查和交通量各参数的统计资料，将车辆概括为几种典型车型并计算其各参数的概率密度函数。基于蒙特卡罗方法模拟产生了通过桥梁的双向多车道车流作为疲劳荷载。针对典型吊杆的影响线加载模拟车流，得到杆件应力历程，用雨流法统计应力历程可以得到应力幅值谱。按照线性累积损伤理论和总交通量预测结果,计算得到各吊杆的在指定时间的累计损伤。 |
| 英文摘要: |
| With the background of a three span tied arch bridge, one fatigue analysis method of suspenders of arch bridge used for highway traffic is presented. The influence lines of suspenders are calculated from the finite element model of the bridge. According to the traffic flow surveys and statistical parameters of the traffic flow, several vehicle models are summarized, whose probability density function can be calculated. The bi dimensional multi line road vehicle traffic flows are generated based on Monte Carlo method. The stress time history of suspenders is obtained through the loads of traffic flow added on the influence line of the suspenders, and the stress spectrum is computed through the rain flow method. Finally, the cumulative damage of critical suspenders is calculated in accordance with the linear cumulative damage theory. |
| 吴冲,杨国涛,张磊.多跨系杆拱桥吊杆疲劳性能研究[J].石家庄铁道大学学报(自然科学版),2009,(4):24-27. |
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